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

Abstract

The embodiment of the present invention discloses a method and a device for carrying a MAC CE of a data packet, which are used to solve the problems of long time delay and large system overhead in the data transmission process. When data transmission is performed in the embodiment of the present invention, first the SDAP protocol sublayer in the sending device sends the data packets to be sent to the MAC protocol sublayer in the sending device; then the MAC protocol sublayer in the sending device receives the data packets according to the The MAC CE is formed from the data packets of the device, and the MAC PDU is formed according to the MAC CE; finally, the MAC protocol sublayer in the sending device sends the MAC PDU through the air interface. In this method, the MAC protocol sublayer in the sending device forms a MAC CE according to the received data packets, so that the MAC CE carries the data packets, thereby realizing the transmission of the data packets on the control channel, which better saves system resources and reduces the delay and system overhead.

Description

A method and device for carrying a MAC CE of a data packet

technical field

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

Background technique

Data transfer refers to the process of transferring data between a data source and a data sink over one or more links in accordance with appropriate procedures. Also refers to the operation of sending data from one place to another by means of a signal on a channel. With the introduction of the 5G concept, the current requirements for data transmission are getting higher and higher. The traditional network design is mainly to meet the needs of broadband mobile Internet, that is, to provide users with a high-bandwidth and high-speed Internet experience. However, compared with traditional networks, 5G has more terminals and higher energy-saving requirements for terminals. It mainly transmits and receives small packets, especially for URLLC (Ultra highreliable low latency communication), mMTC (massive communication) MachineType of Communication (Machine Type of Communication, large-scale machine type communication) is a bursty small packet service, and it is even more necessary to reduce delay and system overhead.

However, the traditional transmission method can only realize the sending of short message data packets on the control channel at the core network layer, and this function has not yet been implemented in the access network. At the same time, there is no transmission mode suitable for small-packet services in traditional data transmission methods. If traditional data transmission methods are used to transmit small-packet services, the network signaling overhead will be much larger than the size of the data payload transmission itself, and even some small-packet services Unable to transfer. Therefore, in the face of URRL, mMTC, such as bursty small-packet services, often has a long delay and high overhead.

To sum up, at present, the time delay in the data transmission process is relatively long, and the system overhead is relatively large.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method and device for carrying a MAC CE (MAC Control Element, media access layer control unit) of a data packet, so as to solve the problems of long delay and large system overhead during data transmission.

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

First, the SDAP (Simple DFS Access Protocol, Simple Distributed File Transfer System Access Protocol) layer in the sending device sends the data packets to be sent to the MAC (Medium Access Control, Media Access Control) sublayer in the sending device; The MAC protocol sublayer in the sending device forms a MAC CE according to the received data packet, and forms a MAC PDU (Medium Access Control Protocol Data Unit, Media Access Control Protocol Data Unit) according to the MAC CE; finally, the sending device The MAC protocol sublayer in the MAC PDU sends the MAC PDU through the air interface.

In the above method, the MAC protocol sublayer in the sending device forms a MAC CE according to the received data packet, so that the MAC CE carries the data packet, so that the data packet is sent on the control channel, and the data packet is sent on the control channel. The data packet bearing and channel establishment delay can be saved, therefore, the above method can better save system resources and reduce the delay and system overhead.

In a possible implementation manner, the SDAP protocol sublayer in the sending device transparently transmits the data packets to be sent to the MAC protocol sublayer in the sending device; or the SDAP protocol sublayer in the sending device The data packets to be sent are directly sent to the MAC protocol sublayer in the sending device.

The above method adopts two methods: transparent transmission mode and direct connection mode, so that the SDAP protocol sublayer sends the data to be sent to the MAC protocol sublayer, and the most suitable method can be selected according to the actual situation, which is more convenient and flexible. This method can better reduce the delay and system overhead.

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

In the above method, the PDCP protocol sublayer in the sending device transparently transmits the data packet to the RLC protocol sublayer in the sending device through the DRB in the PDCP protocol sublayer, and the RLC protocol sublayer in the sending device In the process of transparently transmitting the data packet to the MAC 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 sending device. At the same time, when the PDCP protocol sublayer in the sending device establishes the DRB, the relevant parameters do not need to be calculated, and the default blank value is directly used, thereby better reducing the delay and system overhead.

In a possible implementation manner, the MAC protocol sublayer in the sending device places the index information used to represent the transmission data in the subheader (subheader file) of the MAC PDU.

In the above method, the MAC protocol sublayer places the index information used to represent 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 during the data reception process.

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

In the above method, the MAC PDU is divided into two lengths, one is fixed length and the other is non-fixed length, which has stronger applicability, and by adding indication information in the subheader of the MAC PDU, it is used to indicate that the MAC PDU is Non-fixed length, better distinguish between fixed length and non-fixed length.

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

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

The above method, through the MAC protocol sublayer in the sending device, forms a MAC CE according to the received data packet, so that the MAC CE carries the data packet, thereby realizing the transmission of the data packet on the control channel, and better saving the data packet. Bearing, reducing the delay and system overhead.

In a possible implementation manner, the receiving device determines whether the subheader of the MAC PDU has index information for indicating the transmission data; if so, it is determined that the MAC CE carries a data packet; otherwise, it is determined that the MAC CE does not have index information. carry packets.

In the above method, the MAC protocol sublayer places the index information used to represent 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 during the data reception process.

In a possible implementation manner, the MAC protocol sublayer in the receiving device transparently transmits the data packets to be sent to the SDAP protocol sublayer in the receiving device; or the MAC protocol sublayer in the receiving device The data packets to be sent are directly sent to the SDAP protocol sublayer in the receiving device.

The above method adopts two methods: transparent transmission mode and direct connection mode, so that the SDAP protocol sublayer sends the data to be sent to the MAC protocol sublayer, and the most suitable method can be selected according to the actual situation, which is more convenient and flexible. This method can better reduce the delay and system overhead.

In a possible implementation manner, the MAC protocol sublayer in the receiving device sends the data packet to be sent to the RLC protocol sublayer in the receiving device; the RLC protocol sublayer in the receiving device receives The received data packet is directly sent to the PDCP protocol sublayer in the sending device; the PDCP protocol sublayer in the sending device directly sends the received data packet to the SDAP protocol sublayer in the sending device Floor.

In the above method, the RLC protocol sublayer in the receiving device transparently transmits the data packet to the PDCP protocol sublayer in the transmitting device; the PDCP protocol sublayer in the transmitting device transparently transmits the data packet In the process of sending to the SDAP protocol sublayer in the sending device, because the transparent transmission mode is adopted, the PDCP protocol sublayer in the receiving device does not need to process the data packets. When the PDCP protocol sublayer establishes the DRB, the relevant parameters do not need to be calculated, and the default blank value is directly used, thereby better reducing the delay and system overhead.

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

The processor is used 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; the MAC protocol sublayer in the sending device forms a MAC according to the received data packet CE, and builds a MAC PDU according to the MAC CE; the MAC protocol sublayer in the sending device sends the MAC PDU through the air interface.

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

The processor is used for the MAC protocol sublayer in the receiving device to receive the MAC PDU through the air interface; after the MAC protocol sublayer in the receiving device determines that the MAC CE in the MAC PDU carries a data packet, the data packet is Send to the SDAP protocol sublayer in the receiving device; the SDAP protocol sublayer in the receiving device processes the received data packet, and sends the processed data packet to the upper layer.

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

At least one processing unit and at least one storage unit, wherein the storage unit stores program codes, which, when executed by the processing unit, cause the processing unit to perform the functions of the embodiments of the first aspect .

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

At least one processing unit and at least one storage unit, wherein the storage unit stores program codes, and when the program codes are executed by the processing unit, the processing unit is made to perform the functions of the embodiments of the second aspect above .

In a seventh aspect, a computer-storable medium having stored thereon a computer program that, when executed by a processor, implements the steps of the above method.

In an eighth aspect, the present application further provides a computer storage medium on which a computer program is stored, and when the program is executed by a processor, implements the steps of any one of the methods described in the first aspect to the second aspect.

In addition, for the technical effects brought by any one of the implementation manners of the third aspect to the eighth aspect, reference may be made to the technical effects brought about by different implementation manners in the first aspect to the second aspect, which will not be repeated here.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some of the embodiments of the present invention. In the embodiment, for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

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

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

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

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

5 is a schematic diagram of adding indication information when the MAC PDU is of a non-fixed length according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a sending device using a transparent transmission mode for sending according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a sending device using a direct connection mode for sending according to an embodiment of the present invention;

8 is a schematic diagram of an embodiment of the present invention analysing and obtaining a data packet carried by a MAC CE;

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

FIG. 10 is a schematic diagram of sending by a receiving device in a transparent transmission mode according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a receiving device sending in a direct connection mode according to an embodiment of the present invention;

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

13 is a schematic structural diagram of a second type of MAC CE device carrying data packets according to an embodiment of the present invention;

14 is a schematic structural diagram of a third type of MAC CE device carrying data packets according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of a fourth type of MAC CE device carrying data packets according to an embodiment of the present invention;

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

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

18 is a schematic diagram of a second method for carrying a MAC CE of a data packet according to an embodiment of the present invention;

FIG. 19 is a schematic flowchart of a method for carrying a MAC CE of a data packet according to an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention. not all examples. Based on the embodiments in the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work fall within the protection scope of the embodiments of the present invention.

The following is an explanation of some words that appear in the text:

(1) The term "plurality" in the embodiments of the present application refers to two or more than two, and other quantifiers are similar.

(2) "and/or", which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, can indicate: A alone exists, A and B exist simultaneously, and B exists alone. Happening. The character "/" generally indicates that the associated objects are an "or" relationship.

(3) The "terminal" referred to in the embodiments of the present invention refers to a terminal capable of supporting the method and technology of the MAC CE bearing the data packet.

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

(5) The "SDAP" referred to in the embodiments of the present invention refers to the service discovery application specification defined for the investigation of services. It is responsible for searching for known or specific businesses, as well as some general business searches and browsing.

(7) The "MAC PDU" referred to in the embodiments of the present invention refers to the MAC layer protocol data unit, which is composed of character strings arranged in bytes (8 bits). When reading multiple strings, follow the order from left to right and top to bottom. An SDU is assembled into a MAC PDU in ascending bit order starting from the first bit.

(8) The “transparent transmission mode” referred to in the embodiments of the present invention refers to transparent transmission, which means that in communication, regardless of the content of the transmitted service, it is only responsible for transmitting the content of transmission from the source address to the destination address, but not to the service content. make any changes to the data content.

(9) The "MAC protocol sublayer" referred to in the embodiments of the present invention refers to a method for providing access to a shared medium.

(10) The “PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol)” referred to in the embodiments of the present invention is an abbreviation for the 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 for radio bearers set up by the wireless network service subsystem for lossless.

(11) "RLC (Radio Link Control, Radio Link Control)" referred to in the embodiments of the present invention refers to a radio link control layer protocol in a wireless communication system. In the WCDMA system, the RLC protocol sublayer is located above the MAC layer, providing segmentation and retransmission services for users and control data.

(12) The "LCID (Logical Channel ID, logical channel number)" referred to in the embodiments of the present invention refers to the function of setting or returning an integer used to designate a local or a certain area property.

(13) "DRX (Discontinuous Reception, discontinuous reception)" referred to in the embodiment of the present invention is used for resource control of server virtualization.

(14) The "BSR (Buffer Status Report, buffer status report)" referred to in the embodiment of the present invention refers to the buffer status reporting process used to provide the serving eNB with information about how much data the UE has in the uplink buffer and needs to be sent .

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

The sending device 100 is used to send the data packet that needs to be sent to the MAC protocol sublayer in the sending device through the SDAP protocol sublayer; form a MAC CE according to the received data packet through the MAC protocol sublayer, and form according to the MAC CE MACPDU; send the MAC PDU through the air interface through the MAC protocol sublayer;

The receiving device 101 is used for the MAC protocol sublayer to receive the MAC PDU through the air interface; after determining that the MAC CE in the MAC PDU carries the data packet, the MAC protocol sublayer sends the data packet to the SDAP protocol sublayer in the receiving device ; Process the received data packets through the SDAP protocol sublayer, and send the processed data packets to the upper layer.

In the embodiment of the present invention, in the process of data transmission, firstly, the SDAP protocol sublayer in the sending device sends the data packets to be sent to the MAC protocol sublayer in the sending device, and the MAC protocol sublayer in the sending device is based on the The received data packet forms a MAC CE, and forms a MAC PDU according to the MAC CE; the MAC protocol sublayer in the sending device sends the MAC PDU through the air interface, and then the MAC protocol sublayer in the receiving device receives through the air interface. MAC PDU. 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. Finally, SDAP in the receiving device sends the data packet to the SDAP protocol sublayer in the receiving device. The protocol sublayer processes the received data packets, and sends the processed data packets to the upper layer, so as to realize the transmission of data packets on the control channel, which can better save the bearing of the data packets, and reduce the delay and the system. overhead.

Through the above method, the MAC protocol sublayer in the sending device forms the MAC CE according to the received data packets, so that the MAC CE carries the data packets, so that the data packets are sent on the control channel, and the data packets are sent on the control channel. The data packet bearing and channel establishment delay can be saved, therefore, the above method can better save system resources and reduce the delay and system overhead.

Wherein, as shown in FIG. 2 , the transmitting 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 performing uplink data transmission, the sending device is a terminal, and the receiving device is a base station; when performing downlink data transmission, the sending device is a base station, and the receiving device is a terminal.

The embodiment of the present invention mainly realizes that the data packet is carried by the MAC CE for data transmission. Therefore, a new MAC CE needs to be defined first.

The MAC protocol sublayer in the sending device places the index information used to represent the transmission data in the subheader of the MAC PDU.

In the embodiment of the present invention, the MAC CE type index (Index) of the uplink and downlink bearing data packets is respectively defined in the MAC CE table of the MAC protocol. The specific value of the index can be uniformly planned according to the agreement.

For example, as shown in FIG. 3 , the embodiment of the present invention exemplifies the MAC CE type index of the uplink bearer data packet defined in the MAC CE Table. It can be seen that the index corresponding to the Data Packet (data packet) is AAAAAA. At the same time, as shown in FIG. 4 , the embodiment of the present invention exemplifies the MAC CE type index of the downlink bearer data packet defined in the MAC CE Table, from which it can be seen that the index corresponding to the Data Packet (data packet) is AAAAAA.

It should be noted that the methods listed above are only examples, and any method that can define the MAC CE type index of the uplink and downlink bearing data packets is applicable to the embodiment of the present invention.

Wherein, after defining a new MAC CE, the MAC protocol sublayer in the sending device also needs to form a MAC PDU according to the MAC CE.

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

Wherein, if the MAC PDU is of non-fixed length, the MAC protocol sublayer in the sending device adds information for indicating that the MAC PDU is of non-fixed length in the subheader of the MAC PDU.

As shown in FIG. 5 , assuming that the indication information that identifies the non-fixed length is set to be L, then when the MAC PDU is of non-fixed length, when the subheader in the MAC PDU is of fixed length relative to the MAC PDU, the subheader in the MAC PDU is of fixed length. Added indication information L to indicate that the MAC PDU is of non-fixed length.

Among them, after the MAC CE is successfully used to carry the data packet, in the process of data transmission, the transmission device and the receiving device need to cooperate to perform data transmission. The embodiments of the present invention operate in different methods according to different devices. The following introduced separately.

1. Sending equipment.

Specifically, the SDAP protocol sublayer in the sending device sends the data packet to be sent to the MAC protocol sublayer in the sending device; the MAC protocol sublayer in the sending device forms a MAC CE according to the received data packet, and according to The MAC CE forms a MAC PDU; the MAC protocol sublayer in the sending device sends the MAC PDU through an air interface.

There are many ways for the SDAP protocol sublayer in the sending device to send the data packets to be sent to the MAC protocol sublayer in the sending device, and two are listed below.

Sending mode 1: Send in transparent transmission mode.

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

The transparent transmission refers to transparent transmission, which means that in the process of transparently transmitting the data packets to be sent by the SDAP protocol sublayer in the sending device to the MAC protocol sublayer in the sending device, incorrect Make any changes to the business data content.

First, the SDAP protocol sublayer in the sending device sends the data packets to be sent to the PDCP protocol sublayer in the sending device; then, the PDCP protocol sublayer in the sending device sends the received PDCP SDU directly It is sent to the RLC protocol sublayer in the form of PDCP PDU; finally, the function capable of transmitting DRB data packets is added to the RLC protocol sublayer in the sending device, and the received RLC SDU is directly sent to the MAC in the form of PDCP PDU Protocol sublayer.

As shown in FIG. 6 , when establishing SDAP, the sending device configures all the lower layers of SDAP to be bearer in transparent transmission mode, up to the MAC layer.

For example, when the SDAP protocol sublayer in the sending device receives the data packet and sends it to the MAC protocol sublayer in the sending device, because all the lower layers of SDAP are configured to be carried in transparent transmission mode, and the sending device The RLC protocol sublayer can transmit data packets in the transparent transmission mode. Therefore, after the SDAP protocol sublayer in the sending device sends the data packets to be sent to the PDCP protocol sublayer in the sending device, the sending The PDCP protocol sublayer in the device does not perform any processing on the data packet, and the parameters of the DRB established on the PDCP protocol sublayer in the sending device do not need any calculation, that is, the default blank value can be used, And the DRB transparently transmits the data packet to the RLC protocol sublayer in the sending device, and finally, the RLC protocol sublayer in the sending device adds a function capable of transmitting DRB data packets, and will receive the data packets. The RLC SDUs are directly sent to the MAC protocol sublayer in the form of PDCP PDUs.

Through the above method, during transmission, because the PDCP protocol sublayer in the sending device and the RLC protocol sublayer in the sending device do not perform any processing on the data packet, and the PDCP protocol in the sending device The sublayer does not need to perform calculations when establishing the DRB, thereby better reducing the system overhead and delay.

Sending method 2: Send in 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 transmit, it does not establish the DRB.

Wherein, in the traditional data transmission mode, each time data transmission is performed, a DRB is automatically established before data transmission for data transmission, and the DRB is automatically deleted after the data transmission is completed.

In the embodiment of the present invention, in order to better reduce the time delay and system overhead, when the data packet is carried by the MAC CE for data transmission, the DRB is not automatically established, and at the same time, the SDAP protocol sublayer and the MAC protocol sublayer are directly connected.

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

2. Receiving equipment.

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

Wherein, the MAC protocol sublayer in the receiving device performs data transmission in different ways according to different carriers that carry the data packets, and two are listed below.

1. The MAC CE carries data packets.

For example, after determining that the MAC CE in the MAC PDU carries the 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 transparent transmission mode. The SDAP protocol sublayer in the receiving device sends the data packet, and the SDAP protocol sublayer in the receiving device processes the received data packet, and sends the processed data packet to the upper layer.

2. MAC CE does not carry data packets.

For example, after determining that the MAC CE in the MAC PDU does not carry data packets, the MAC protocol sublayer in the receiving device establishes a normal mode DRB in the PDCP protocol sublayer in the receiving device, and then the receiving device The MAC protocol sublayer in the device transmits the data packet to be sent 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 performs the received data packet processing. process, and send the processed packet to the upper layer.

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

Specifically, the receiving device determines whether the subheader of the MAC PDU has index information for indicating transmission data; if so, determines that the MAC CE carries a data packet, otherwise, determines that the MAC CE does not carry a 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. If the parsed MAC PDU as shown in Figure 8 contains index information used to represent the transmission data, such as AAAAA, then determine the MAC PDU. The MAC CE carries data packets. If the MAC PDU parsed as shown in FIG. 9 does not contain index information for indicating transmission data, it is determined that the MAC CE does not carry a data packet.

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

Receive mode 1: Send in 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, which refers to the process of transparently transmitting the received data packets to the SDAP protocol sublayer in the receiving device by the MAC protocol sublayer in the receiving device. Make any changes to the business data content.

First, the MAC protocol sublayer in the receiving device sends the data packets to be sent to the RLC protocol sublayer in the receiving device; then, the RLC protocol sublayer in the receiving device adds the ability to transmit DRB data packets function, and directly send the received data packet to the PDCP protocol sublayer in the sending device; finally, the PDCP protocol sublayer in the sending device directly sends the received data packet to the PDCP protocol sublayer. SDAP protocol sublayer in the sending device.

As shown in FIG. 10 , for example, the MAC protocol sublayer in the receiving device receives the MAC PDU through an air interface, and the MAC protocol sublayer in the receiving device parses the MAC PDU to obtain a MAC CE, and determines that the MAC CE carries data After the packet, when the data packet in the MAC CE is sent to the SDAP protocol sublayer in the receiving device, because the transparent transmission mode is adopted, the MAC protocol sublayer in the receiving device sends the data packet to be sent to the SDAP protocol sublayer. The RLC protocol sublayer in the sending device and the RLC protocol sublayer in the receiving device add a function capable of transmitting DRB data packets, and directly send the received data packets to the PDCP in the sending device When the protocol sublayer is used, the PDCP protocol sublayer in the receiving device does not perform any processing on the data packet, and the parameters of the DRB established on the PDCP protocol sublayer in the receiving device do not need any calculation. The default blank value may be used, and finally, the DRB transparently transmits the data packet to the MAC protocol sublayer in the sending device.

Through the above method, during transmission, because the PDCP protocol sublayer in the receiving device and the RLC protocol sublayer in the sending device do not perform any processing on the data packet, and the PDCP protocol in the receiving device The sublayer does not need to perform calculations when establishing the DRB, thereby better reducing the system overhead and delay.

Receive mode 2: use direct connection mode to send.

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 the air interface, the MAC protocol sublayer in the receiving device parses the MAC PDU, obtains the MAC CE, and determines the MAC CE After the data packet is carried, when the data packet in the MAC CE is sent to the SDAP protocol sublayer in the receiving device, because the direct connection mode is adopted, the MAC protocol sublayer in the receiving device directly communicates with the receiving device. Therefore, the MAC protocol sublayer in the receiving device directly sends the data packets to be sent to the SDAP protocol sublayer in the receiving device, and because the intermediate data transmission is reduced in the data transmission. The transmission step is therefore better to reduce the overhead of the system and shorten the delay.

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

The processor 1200 is used to send the data packet to be sent to the MAC protocol sublayer in the sending device through the SDAP protocol sublayer; form a MAC CE according to the received data packet through the MAC protocol sublayer, and according to the MAC protocol sublayer The CE builds up the MAC PDU; the MAC PDU is sent by the transceiver through the air interface through the MAC protocol sublayer.

Optionally, the processor 1200 is specifically used for:

Transparently transmit the data packets to be sent to the MAC protocol sublayer in the sending device through the SDAP protocol sublayer; or directly send the data packets to be sent to the MAC protocol sublayer in the sending device through the SDAP protocol sublayer .

Optionally, the processor 1200 is specifically used for:

Send the data packets to be sent to the PDCP protocol sublayer in the sending device through the SDAP protocol sublayer; directly send the received PDCP SDU in the form of PDCP PDU to the RLC protocol sublayer through the PDCP protocol sublayer; The protocol sublayer directly sends the received RLC SDU to the MAC protocol sublayer in the form of RLC PDU.

Optionally, the processor 1200 is specifically used for:

The index information used to represent the transmission data is placed in the subheader of the MAC PDU through the MAC protocol sublayer.

Optionally, the processor 1200 is further configured to:

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

As shown in FIG. 13 , the present invention provides a device for carrying a MAC CE of a data packet, and the device includes:

At least one processing unit 1300 and at least one storage unit 1301, wherein the storage unit stores program codes, and when the program codes are executed by the processing unit, the processing unit is made to perform the following processes:

Send the data packet to be sent to the MAC protocol sublayer in the sending device through the SDAP protocol sublayer; form a MAC CE according to the received data packet through the MAC protocol sublayer, and form a MAC PDU according to the MAC CE; through the MAC protocol The sublayer sends the MAC PDU over the air interface through the transceiver.

Optionally, the processing unit 1300 is specifically configured to:

Transparently transmit the data packets to be sent to the MAC protocol sublayer in the sending device through the SDAP protocol sublayer; or

The data packets to be sent are directly sent to the MAC protocol sublayer in the sending device through the SDAP protocol sublayer.

Optionally, the processing unit 1300 is specifically configured to:

Send the data packets to be sent to the PDCP protocol sublayer in the sending device through the SDAP protocol sublayer; directly send the received PDCP SDU in the form of PDCP PDU to the RLC protocol sublayer through the PDCP protocol sublayer; The protocol sublayer directly sends the received RLC SDU to the MAC protocol sublayer in the form of RLC PDU.

Optionally, the processing unit 1300 is specifically configured to:

The index information used to represent the transmission data is placed in the subheader of the MAC PDU through the MAC protocol sublayer.

Optionally, the processing unit 1300 is further configured to:

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

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

The processor: used for receiving the MAC PDU through the air interface by the transceiver through the MAC protocol sublayer; after determining that the MAC CE in the MAC PDU carries the data packet through the MAC protocol sublayer, the data packet is sent to the receiving device. SDAP protocol sublayer sends; the received data packet is processed through the SDAP protocol sublayer, and the processed data packet is sent to the upper layer.

Optionally, the processor 1400 is specifically configured to judge whether the MAC CE carries a data packet in the following manner:

Determine whether the subheader of the MAC PDU has index information for indicating transmission data; if so, determine that the MAC CE carries a data packet, otherwise, determine that the MAC CE does not carry a data packet.

Optionally, the processor 1400 is specifically configured to:

Transparently transmit the data packets to be sent to the SDAP protocol sublayer in the receiving device through the MAC protocol sublayer; or directly send the data packets to be sent to the SDAP protocol sublayer in the receiving device through the MAC protocol sublayer .

Optionally, the processor 1400 is specifically configured to:

Send the data packet to be sent to the RLC protocol sublayer in the receiving device through the MAC protocol sublayer; directly send the received data packet to the PDCP protocol sublayer in the sending device through the RLC protocol sublayer ; Send the received data packet directly to the SDAP protocol sublayer in the sending device through the PDCP protocol sublayer.

As shown in FIG. 15 , the present invention provides a device for carrying a MAC CE of a data packet, and the device includes:

At least one processing unit 1500 and at least one storage unit 1501, wherein the storage unit stores program codes, and when the program codes are executed by the processing unit, the processing unit executes the following processes:

The transceiver receives the MAC PDU through the air interface through the MAC protocol sublayer; after determining that the MAC CE in the MAC PDU carries the data packet, the MAC protocol sublayer sends the data packet to the SDAP protocol sublayer in the receiving device; The SDAP protocol sublayer processes the received data packets, and sends the processed data packets to the upper layer.

Optionally, the processing unit 1500 is specifically configured to judge whether the MAC CE carries a data packet in the following manner:

The MAC protocol sublayer is used to determine whether the subheader of the MAC PDU has index information for indicating transmission data; if so, it is determined that the MAC CE carries a data packet, otherwise, it is determined that the MAC CE does not carry a data packet.

Optionally, the processing unit 1500 is specifically configured to:

Transparently transmit the data packets to be sent to the SDAP protocol sublayer in the receiving device through the MAC protocol sublayer; or directly send the data packets to be sent to the SDAP protocol sublayer in the receiving device through the MAC protocol sublayer .

Optionally, the processing unit 1500 is specifically configured to:

Send the data packet to be sent to the RLC protocol sublayer in the receiving device through the MAC protocol sublayer; directly send the received data packet to the PDCP protocol sublayer in the sending device through the RLC protocol sublayer ; Send the received data packet directly to the SDAP protocol sublayer in the sending device through the PDCP protocol sublayer.

Based on the same concept, an embodiment of the present invention provides another terminal that carries a MAC CE of a data packet. As shown in FIG. 16 , the terminal 1600 includes: a radio frequency (Radio Frequency, RF) circuit 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, a wireless fidelity (Wireless Fidelity, WiFi) module 1690 and other components. Those skilled in the art can understand that the structure of the terminal shown in FIG. 16 does not constitute a limitation on the terminal, and the terminal provided in this embodiment of the present application may include more or less components than those shown in the figure, or combine some components, Or a different component arrangement.

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

The RF circuit 1610 can be used for data reception and transmission during communication or conversation. In particular, after receiving the downlink data of the base station, the RF circuit 1610 sends it to the processor 930 for processing; in addition, it sends the uplink data to be sent to the base station. Generally, the RF circuit 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 circuit 1610 can also communicate with the network and other terminals through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile Communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division) Multiple Access, CDMA), Wideband Code Division Multiple Access (Wideband Code Division Multiple Access, WCDMA), Long Term Evolution (Long Term Evolution, LTE), email, Short Messaging Service (Short Messaging Service, SMS) and the like.

The WiFi technology belongs to the short-distance wireless transmission technology, and the terminal 1600 can access the data network through an access point (Access Point, AP) to which the WiFi module 1690 can be connected. The WiFi module 1690 can be used for data reception and transmission during communication.

The terminal 1600 can be physically connected with other terminals through the communication interface 1690 . Optionally, the communication interface 1690 is connected with the communication interface of the other terminal through a cable, so as to realize data transmission between the terminal 900 and the other terminal.

In this embodiment of the present application, the terminal 1600 can implement communication services and send information to other contacts. Therefore, the terminal 1600 needs to have a data transmission function, that is, the terminal 1600 needs to include a communication module. Although FIG. 16 shows communication modules such as the RF circuit 1610 , the WiFi module 1690 , and the communication interface 1690 , it should be understood that the terminal 1600 has at least one of the above components or other components for A communication module (such as a Bluetooth module) that implements communication 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 The interface 1690 may further 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, it can realize Some or all of the processes in FIG. 17 in the embodiment of the present invention.

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

In addition, the memory 1640 may include high-speed random access memory, and may also include 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 configured to receive numeric or character information input by a user, and generate key signal input 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 .

Wherein, the touch panel 1651, also called a touch screen, can collect the user's touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc. on the touch panel 1651 or on the touch panel 1651). operation near the touch panel 1651 ), and drive the corresponding connection device according to the preset program. Optionally, the touch panel 1651 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the touch controller. to the processor 1630, and can receive and execute commands sent by the processor 1630. In addition, the touch panel 1651 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.

Optionally, the other input terminals 1652 may include, but are not limited to, one or more of physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, joysticks, and the like.

The display unit 1660 may be used to display information input by the user or information provided to the user and various menus of the terminal 1600 . The display unit 1660 is the display system of the terminal 1600, and is used for presenting an interface and realizing human-computer interaction.

The display unit 1660 may include a display panel 1661 . Optionally, the display panel 1661 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (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 it, it transmits it to the processor 1630 to determine the type of the touch event, Then the processor 1630 provides corresponding visual output on the display panel 1661 according to the type of touch event.

Although in FIG. 16 , the touch panel 1651 and the display panel 1661 are used as two independent components to realize the input and input functions of the terminal 1600, but in some embodiments, the touch panel 1661 may be The control panel 1651 is integrated with the display panel 1661 to realize the input and output functions of the terminal 1600 .

The processor 1630 is the control center of the terminal 1600, uses various interfaces and lines to connect various components, runs or executes the software programs and/or modules stored in the memory 1640, and invokes the software programs and/or modules stored in the memory 1640. 1640, perform various functions of the terminal 1600 and process data, thereby realizing 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 the operating system, user interface, and application programs, and the like, and the modem processor mainly handles wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 1630.

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

The terminal 1600 also includes a power source 1620 (eg, 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 as to implement functions such as managing charging, discharging, and power consumption through the power management system.

Although not shown, the terminal 1600 may further include at least one sensor, an audio circuit, and the like, which will not be repeated here.

The memory 1640 may store the same program codes as the storage unit 1601 , and when the program codes are executed by the processor 1630 , the processor 1630 can realize all the functions of the processing unit 1600 .

Embodiments of the present invention further provide a non-volatile readable storage medium, including program code, when the program code is run on a computing device, the program code is used to cause the computing device to execute a MAC carrying a data packet The steps of the method of CE.

Based on the same inventive concept, an embodiment of the present invention also provides a method for carrying a MAC CE of a data packet, because the device corresponding to the method is a device that carries the MAC CE of a data packet in the embodiment of the present invention, and the method solves the problem. The principle is similar to that of the device, so the implementation of the method can refer to the implementation of the system, and the repetition will not be repeated.

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

Step 1700, the SDAP protocol sublayer in the sending device sends the data packet that needs to be sent to the MAC protocol sublayer in the sending device;

Step 1701: The MAC protocol sublayer in the sending device forms a MAC CE according to the received data packet, and forms a MAC PDU according to the MAC CE;

Step 1702: The MAC protocol sublayer in the sending device sends the MAC PDU through the air interface.

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

The SDAP protocol sublayer in the sending device transparently transmits the data packets to be sent to the MAC protocol sublayer in the sending device through the DRB; or

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.

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

The MAC protocol sublayer in the sending device places the index information used to represent the transmission data in the subheader of the MAC PDU.

Optionally, the MAC protocol sublayer in the sending device forms a MAC PDU according to the MAC CE, further comprising:

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

Based on the same inventive concept, an embodiment of the present invention also provides a method for carrying a MAC CE of a data packet, because the device corresponding to the method is a device that carries the MAC CE of a data packet in the embodiment of the present invention, and the method solves the problem. The principle is similar to that of the device, so the implementation of the method can refer to the implementation of the system, and the repetition will not be repeated.

As shown in FIG. 18 , an embodiment of the present invention further provides a method for carrying a MAC CE of a data packet, and the method includes:

Step 1800, the MAC protocol sublayer in the receiving device receives the MAC PDU through the 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 sublayer in the receiving device processes the received data packet, and sends the processed data packet to the upper layer.

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

The MAC protocol sublayer in the receiving device judges whether the subheader of the MAC PDU has index information for indicating the transmission data; if so, it is determined that the MAC CE carries a data packet, otherwise, it is determined that the MAC CE does not carry a data packet .

Optionally, the MAC protocol sublayer in the receiving device sends the data packet to the SDAP protocol sublayer in the receiving device, including:

The MAC protocol sublayer in the receiving device transparently transmits the data packets to be sent to the SDAP protocol sublayer in the receiving device through the DRB; or

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.

In the above-mentioned embodiments of the present application, the methods provided by the embodiments of the present application are introduced from the perspective of the terminal and the base station as execution subjects. In order to implement the functions in the methods provided in the above embodiments of the present application, the terminal and the base station may include hardware structures and/or software modules, and implement the above functions in the form of hardware structures, software modules, or hardware structures plus software modules. Whether one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

As shown in FIG. 19, an embodiment of the present invention provides a method for carrying a MAC CE of a data packet, wherein a terminal is selected as a transmitting device, a base station is a receiving device, and a transparent transmission mode is selected for transmission and reception for illustration, which specifically includes the following step:

Step 1900, the SDAP protocol sublayer in the sending device sends the data packet that needs 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 sublayer in the sending device sends the MAC PDU through the air interface;

Step 1903: the MAC protocol sublayer in the receiving device receives the MAC PDU through the air interface;

Step 1904: The MAC protocol sublayer in the receiving device judges whether there is index information used to represent the transmission data in the subheader of the MAC PDU, if so, go to step 1905, if not, go to step 1906;

Step 1905: The MAC protocol sublayer in the receiving device determines that the MAC CE carries a data packet, and executes Step 1907;

Step 1906: The MAC protocol sublayer in the receiving device determines that the MAC CE does not carry a data packet, and executes Step 1908;

Step 1907: The MAC protocol sublayer in the receiving device transparently transmits the data packet to be sent to the SDAP protocol sublayer in the receiving device through the DRB, and step 1909 is executed;

Step 1908: The MAC protocol sublayer in the receiving device transmits the data packet to be sent to the SDAP protocol sublayer in the receiving device through the DRB layer in the normal mode, and step 1909 is performed;

Step 1909: The SDAP protocol sublayer in the receiving device processes the received data packet, and sends the processed data packet to the upper layer.

The present application is described above with reference to block diagrams and/or flowchart illustrations illustrating methods, apparatus (systems) and/or computer program products according to embodiments of the present application. It will be understood that a block of the block diagrams and/or flowchart illustrations, and combinations of blocks of the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a general purpose computer, a processor of a special purpose computer and/or other programmable data processing apparatus to produce a machine such that the instructions executed via the computer processor and/or other programmable data processing apparatus create a Methods of implementing the functions/acts specified in the block diagrams and/or flowchart blocks.

Accordingly, the present application may also be implemented in hardware and/or software (including firmware, resident software, microcode, etc.). Still further, 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 an instruction execution system or Used in conjunction with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or transmit a program for use by, or in connection with, an instruction execution system, apparatus, or device. device or equipment use.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these 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 these modifications and variations.

Claims (20)

1. A method for a medium access layer control unit MAC CE carrying a data packet, wherein the method comprises: The service data adaptation protocol SDAP protocol sublayer in the sending device sends the data packet to be sent to the media access control MAC protocol sublayer in the sending device; The MAC protocol sublayer in the sending device forms a MAC CE according to the received data packet, and forms a medium access control protocol data unit MAC PDU according to the MAC CE; The MAC protocol sublayer in the sending device sends the MAC PDU through the air interface. 2. The method of claim 1, wherein the SDAP protocol sublayer in the sending device sends the data packet that needs to be sent to the MAC protocol sublayer in the sending device, comprising: The SDAP protocol sublayer in the sending device transparently transmits the data packets to be sent to the MAC protocol sublayer in the sending device; or 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. 3. The method according to claim 2, wherein the SDAP protocol sublayer in the sending device transparently transmits the data packets to be sent to the MAC protocol sublayer in the sending device, comprising: The SDAP protocol sublayer in the sending device sends the 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 device directly sends the received PDCP SDU to the radio link control RLC protocol sublayer in the form of PDCP PDU; The RLC protocol sublayer in the sending device directly sends the received RLC SDU to the MAC protocol sublayer in the form of an RLC PDU. 4. The method according to claim 1 or 2, wherein the MAC protocol sublayer in the sending device forms a MAC PDU according to the MAC CE, comprising: The MAC protocol sublayer in the sending device places the index information used to represent the transmission data in the subheader file subheader of the MAC PDU. 5. The method of claim 4, wherein the MAC protocol sublayer in the sending device forms a MAC PDU according to the MACCE, further comprising: If the MAC PDU is of non-fixed length, the MAC protocol sublayer in the sending device adds information for indicating that the MAC PDU is of non-fixed length in the subheader of the MAC PDU. 6. A method for carrying the MAC CE of a data packet, wherein the method comprises: The MAC protocol sublayer in the receiving device receives the MAC PDU through the air interface; 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; The SDAP protocol sublayer in the receiving device processes the received data packets, and sends the processed data packets to the upper layer. 7. The method of claim 6, wherein the MAC protocol sublayer in the receiving device judges whether the MAC CE carries a data packet by the following methods: The MAC protocol sublayer in the receiving device judges whether the subheader of the MAC PDU has index information for representing the transmission data; If so, it is determined that the MAC CE carries a data packet, otherwise, it is determined that the MAC CE does not carry a data packet. 8. The method of claim 6, wherein the MAC protocol sublayer in the receiving device sends the data packet to the SDAP protocol sublayer in the receiving device, comprising: The MAC protocol sublayer in the receiving device transparently transmits the data packets to be sent to the SDAP protocol sublayer in the receiving device; or 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. 9. The method of claim 8, wherein the MAC protocol sublayer in the receiving device transparently transmits the data packets to be sent to the SDAP protocol sublayer in the receiving device, comprising: The MAC protocol sublayer in the receiving device sends the data packet to be sent to the RLC protocol sublayer in the receiving device; The RLC protocol sublayer in the receiving device directly sends the received data packet to the PDCP protocol sublayer in the transmitting device; The PDCP protocol sublayer in the sending device directly sends the received data packet to the SDAP protocol sublayer in the sending device. 10. A device for carrying a MAC CE of a data packet, comprising: 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 device through the SDAP protocol sublayer; forming a MAC CE according to the received data packet through the MAC protocol sublayer, and according to the MAC CE A MAC PDU is formed; the MAC PDU is sent by the air interface through the transceiver through the MAC protocol sublayer. 11. The device of claim 10, wherein the processor is specifically configured to: Transparently transmit the data packets to be sent to the MAC protocol sublayer in the sending device through the SDAP protocol sublayer; or directly send the data packets to be sent to the MAC protocol sublayer in the sending device through the SDAP protocol sublayer . 12. The device of claim 11, wherein the processor is specifically configured to: Send the data packets to be sent to the PDCP protocol sublayer in the sending device through the SDAP protocol sublayer; directly send the received PDCP SDU in the form of PDCP PDU to the RLC protocol sublayer through the PDCP protocol sublayer; The protocol sublayer directly sends the received RLC SDU to the MAC protocol sublayer in the form of RLC PDU. 13. The device according to claim 10 or 11, wherein the processor is specifically configured to: The index information used to represent the transmission data is placed in the subheader of the MAC PDU through the MAC protocol sublayer. 14. The apparatus of claim 13, wherein the processor is further configured to: If the MAC PDU is of non-fixed length, the MAC protocol sublayer adds information for indicating that the MAC PDU is of non-fixed length in the subheader of the MAC PDU. 15. A device for carrying a MAC CE of a data packet, comprising: a processor and a transceiver: The processor is configured to receive the MAC PDU by the transceiver through the air interface through the MAC protocol sublayer; after determining that the MAC CE in the MAC PDU carries the data packet, the MAC protocol sublayer sends the data packet to the receiving device. SDAP protocol sublayer sends; the received data packet is processed through the SDAP protocol sublayer, and the processed data packet is sent to the upper layer. 16. The device according to claim 15, wherein the processor is specifically configured to judge whether the MAC CE carries a data packet in the following manner: The MAC protocol sublayer is used to determine whether the subheader of the MAC PDU has index information for indicating transmission data; if so, it is determined that the MAC CE carries a data packet, otherwise, it is determined that the MAC CE does not carry a data packet. 17. The device of claim 15, wherein the processor is specifically configured to: Transparently transmit the data packets to be sent to the SDAP protocol sublayer in the receiving device through the MAC protocol sublayer; or directly send the data packets to be sent to the SDAP protocol sublayer in the receiving device through the MAC protocol sublayer . 18. The device of claim 17, wherein the processor is specifically configured to: Send the data packet to be sent to the RLC protocol sublayer in the receiving device through the MAC protocol sublayer; directly send the received data packet to the PDCP protocol sublayer in the sending device through the RLC protocol sublayer ; Send the received data packet directly to the SDAP protocol sublayer in the sending device through the PDCP protocol sublayer. 19. A device for carrying a MAC CE of a data packet, characterized in that the device comprises: at least one processing unit and at least one storage unit, wherein the storage unit stores a program code, and when the program code is stored by the When the processing unit executes, the processing unit is caused to execute the steps of any one of the methods of claims 1 to 5 or the steps of any of the methods of claims 6 to 9. 20. A computer-storable medium on which a computer program is stored, characterized in that, when the program is executed by a processor, the steps of the method according to any one of claims 1 to 5 or any one of claims 6 to 9 are implemented. steps of the method described.

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