CN116266931A - Method, device, communication equipment and storage medium for data packet serial connection - Google Patents

Abstract

The embodiment of the invention discloses a data packet concatenation method, device, communication equipment and storage medium. The method includes: the terminal device receives first indication information, and the first indication information is used to indicate whether to enable Packet Data Convergence Protocol (PDCP) data packet concatenation; the PDCP data packet concatenation means that before the PDCP entity adds a header, the At least two PDCP Service Data Units (SDUs) are concatenated.

Description

A method, device, communication device and storage medium for concatenation of data packets

technical field

The present invention relates to the technical field of communication, in particular to a method, device, communication device and storage medium for concatenating data packets.

Background technique

For 4K video streams and file downloads transmitted over a Transmission Control Protocol (TCP, Transmission Control Protocol) connection, a user equipment (UE, User Equipment) may simultaneously generate many TCP feedback acknowledgment (ACK) packets. These packets only carry TCP ACK information, and the packet size is between 25-60 bytes. Considering that the Packet Data Convergence Protocol (PDCP, Packet Data Convergence Protocol) layer respectively performs user plane integrity protection and encryption operations on these small data packets, the processing efficiency is low. At the same time, for each small data packet, layer 2 (L2, Layer2) needs to add various headers to it, and these headers need about 6 bytes (for example, the PDCP header occupies 2-3 bytes, and the radio link control (RLC) , Radio Link Control) packet header occupies 2-3 bytes, medium access control (MAC, Medium AccessControl) packet header occupies 2 bytes), accounting for 19% of the entire packet size (assuming each packet is 25 bytes)/9% (assuming 60 bytes per packet).

Contents of the invention

In order to solve the existing technical problems, the embodiments of the present invention provide a data packet concatenation method, device, communication device and storage medium.

In order to achieve the above object, the technical solution of the embodiment of the present invention is achieved in this way:

In the first aspect, the embodiment of the present invention provides a method for concatenating data packets, the method comprising:

The terminal device receives first indication information, and the first indication information is used to indicate whether to enable PDCP data packet concatenation; the PDCP data packet concatenation refers to at least two PDCP service data units (SDU, Service Data Unit) in series.

In the above solution, the terminal device receiving the first indication information includes: the terminal device receiving first configuration information sent by the network device, the first configuration information including the first indication information;

The first configuration information further includes: the size of an indication field in the PDCP message header used to indicate the length of the data packet; and/or, an option used to indicate the concatenation rule of the data packet.

In the above solution, the first indication information further includes at least one of the following information:

The size of the indication field used to indicate the length of the data packet in the PDCP message header;

Option to indicate packet concatenation rules.

In the above solution, the terminal device receives the first configuration information sent by the network device, including:

The terminal device receives the first configuration information sent by the network device through high-layer signaling.

In the above solution, the terminal device receives the first indication information, including:

The PDCP entity of the terminal device receives the first indication information sent by the MAC entity.

In the above solution, the first indication information is also used to indicate the activated option for indicating the data packet concatenation rule, and the option for indicating the data packet concatenation rule is configured by the network device, or the terminal device pre-configured Defined, or stipulated by the agreement.

In the above solution, the method further includes: the PDCP entity of the terminal device receives at least one of the following information sent by the MAC entity:

predicted transport block size;

Predicted uplink resource allocation size;

Predicted channel quality.

In the above solution, the option for indicating the data packet concatenation rule includes one of the following:

option to indicate concatenated packet size;

option to indicate the number of concatenated packets;

Options for different concatenated packet sizes or number of concatenated packets for different predicted transport block sizes;

For different predicted uplink resource allocation sizes, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers;

For different predicted channel qualities, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers.

In the above solution, the method further includes: the PDCP entity of the terminal device sends PDCP data based on the first indication information, and when the first indication information indicates that PDCP data packet concatenation is enabled, the PDCP data in the PDCP data Concatenated PDCP packets are included.

In the above solution, at least one reserved bit in the packet header of the PDCP data is used to indicate whether to enable PDCP data packet concatenation.

In the above solution, at least two reserved bits in the packet header of the PDCP data are used to indicate the enabled option for indicating the concatenation rules of PDCP data packets.

In the above solution, the packet header of the PDCP data further includes at least one first indication field, and the at least one first indication field is used to indicate the size of each received upper layer data packet or each compressed The size of the upper layer packet.

In the above solution, when the terminal device is switched from the first network device to the second network device, the method further includes:

The terminal device sends a first PDCP status report to the second network device, and the sequence number field in the first PDCP status report is filled with sequence numbers of data packets not received in the first network device.

In the above solution, the method further includes: the terminal device receiving a second PDCP status report sent by the second network device, and the sequence number field in the second PDCP status report is filled in the first network device The sequence number of the packet that was not received.

In the above solution, the method further includes: the terminal device sending capability information to the network device, where the capability information includes at least one of the following information:

Whether the terminal device supports the PDCP packet concatenation function;

Whether the terminal device supports the uplink PDCP packet concatenation function;

Whether the terminal device supports the downlink PDCP packet concatenation function.

In the second aspect, the embodiment of the present invention also provides a method for concatenating data packets, the method comprising:

The network device sends first indication information to the terminal device, where the first indication information is used to indicate whether to enable PDCP data packet concatenation; the PDCP data packet concatenation refers to concatenation of at least two PDCP SDUs before the PDCP entity adds a header.

In the above solution, the network device sending the first indication information to the terminal device includes: the network device sending first configuration information to the terminal device, the first configuration information including the first indication information;

The first configuration information further includes: the size of an indication field in the PDCP message header used to indicate the length of the data packet; and/or, an option used to indicate the concatenation rule of the data packet.

In the above solution, the first indication information further includes at least one of the following information:

The size of the indication field used to indicate the length of the data packet in the PDCP message header;

Option to indicate packet concatenation rules.

In the above solution, the option for indicating the data packet concatenation rule includes one of the following:

option to indicate concatenated packet size;

option to indicate the number of concatenated packets;

Options for different concatenated packet sizes or number of concatenated packets for different predicted transport block sizes;

For different predicted uplink resource allocation sizes, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers;

For different predicted channel qualities, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers.

In the above solution, the network device sends the first configuration information to the terminal device, including:

The network device sends the first configuration information to the terminal device through high-level signaling.

In the above scheme, the method further includes: the network device receiving the data sent by the terminal device, and when the first indication information indicates that PDCP data packet concatenation is enabled, the PDCP data corresponding to the data includes concatenation PDCP packets.

In the above solution, at least one reserved bit in the packet header of the PDCP data is used to indicate whether to enable PDCP data packet concatenation.

In the above solution, at least two reserved bits in the packet header of the PDCP data are used to indicate the enabled option for indicating the concatenation rules of PDCP data packets.

In the above solution, the packet header of the PDCP data further includes at least one first indication field, and the at least one first indication field is used to indicate the size of each received upper layer data packet or each compressed The size of the upper layer packet.

In the above solution, when the terminal device is switched from the first network device to the second network device, the method further includes: when the network device is the first network device, the The first network device sends the first configuration information to the second network device.

In the above solution, when the terminal device is switched from the first network device to the second network device, the method further includes: when the network device is the second network device, the The second network device sends the first configuration information to the first network device.

In the above scheme, the method further includes: the second network device receiving the first PDCP status report sent by the terminal device, and the sequence number field in the first PDCP status report is filled in the first network device The sequence number of the packet that was not received.

In the above solution, the method further includes: the second network device sending a second PDCP status report to the terminal device, and the sequence number field in the second PDCP status report is filled in the The sequence number of the received packet.

In the above solution, the method further includes: the network device receiving capability information sent by the terminal device, where the capability information includes at least one of the following information:

Whether the terminal device supports the PDCP packet concatenation function;

Whether the terminal device supports the uplink PDCP packet concatenation function;

Whether the terminal device supports the downlink PDCP packet concatenation function.

In the third aspect, the embodiment of the present invention also provides an apparatus for concatenating data packets, the apparatus is applied to terminal equipment; the apparatus includes a first receiving unit for receiving first indication information, and the first indication The information is used to indicate whether to enable PDCP data packet concatenation; the PDCP data packet concatenation refers to concatenation of at least two PDCP SDUs before the PDCP entity adds a packet header.

In the fourth aspect, the embodiment of the present invention also provides a device for concatenating data packets, the device is applied to network equipment; the device includes a second sending unit, configured to send the first indication information to the terminal device, the The first indication information is used to indicate whether to enable PDCP data packet concatenation; the PDCP data packet concatenation means to concatenate at least two PDCP SDUs before the PDCP entity adds a packet header.

In the fifth aspect, the embodiments of the present invention also provide a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the method described in the first aspect or the second aspect of the embodiments of the present invention is implemented. step.

In the sixth aspect, the embodiment of the present invention also provides a communication device, including a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor implements the implementation of the present invention when executing the program. For example, the steps of the method described in the aforementioned first aspect or second aspect.

The embodiment of the present invention provides a data packet concatenation method, device, communication device, and storage medium. The method includes: the terminal device receives first indication information, and the first indication information is used to indicate whether to enable PDCP data packet concatenation; The aforementioned concatenation of PDCP data packets refers to concatenation of at least two PDCP SDUs before the PDCP entity adds a packet header. By adopting the technical solution of the embodiment of the present invention, by cascading PDCP SDUs, the overhead of the packet header is reduced, and the processing efficiency of L2 can also be improved.

Description of drawings

FIG. 1 is a first schematic flow diagram of a method for concatenating data packets according to an embodiment of the present invention;

2 is a schematic diagram of an indication from a MAC entity to a PDCP entity in a method for concatenating data packets according to an embodiment of the present invention;

3a to 3d are schematic diagrams of the format of data packets in the method for concatenating data packets according to an embodiment of the present invention;

4 is a schematic diagram of a PDCP status report format in a method for concatenating data packets according to an embodiment of the present invention;

FIG. 5 is a second schematic flow diagram of a method for concatenating data packets according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an interaction flow of a method for concatenating data packets according to an embodiment of the present invention;

FIG. 7 is a first schematic diagram of the composition and structure of a device for connecting data packets in series according to an embodiment of the present invention;

FIG. 8 is a second structural diagram of a device for connecting data packets in series according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a hardware composition structure of a communication device according to an embodiment of the present invention.

Detailed ways

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

The technical solution of the embodiment of the present invention can be applied to various communication systems, for example: Global System of Mobile communication (GSM, Global System of Mobile communication) system, Long Term Evolution (LTE, Long Term Evolution) system or 5G system, etc. Optionally, the 5G system or the 5G network may also be called a New Radio (NR, New Radio) system or an NR network.

Exemplarily, the communication system to which the embodiment of the present invention is applied may include a network device and a terminal device (also referred to as a terminal, a communication terminal, etc.); the network device may be a device that communicates with the terminal device. Wherein, the network device can provide communication coverage within a certain area, and can communicate with terminals located in the area. Optionally, the network device may be a base station in each communication system, such as an evolved base station (eNB, Evolutional Node B) in an LTE system, or a base station (gNB) in a 5G system or an NR system.

It should be understood that a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device. Communication equipment may include network equipment and terminals with communication functions, and the network equipment and terminal equipment may be the specific equipment described above, which will not be repeated here; communication equipment may also include other equipment in the communication system, such as network controllers , mobility management entity and other network entities, which are not limited in this embodiment of the present invention.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein, for example, can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The embodiment of the present invention provides a data packet concatenation method, which is applied to a terminal device. Fig. 1 is a schematic flow diagram one of a method for concatenating data packets according to an embodiment of the present invention; as shown in Fig. 1 , the method includes:

Step 101: The terminal device receives first indication information, and the first indication information is used to indicate whether to enable PDCP data packet concatenation; the PDCP data packet concatenation refers to concatenation of at least two PDCP SDUs before the PDCP entity adds a header.

In the embodiment of the present invention, based on the indication of the first indication information, the terminal device can enable the PDCP data packet concatenation function, and then perform concatenation of at least two PDCP SDUs before the PDCP entity adds the header, and reduce the PDCP SDU concatenation by concatenating the PDCP SDUs. The overhead of the packet header is reduced, and the processing efficiency of L2 can also be improved.

In some optional embodiments, the receiving the first indication information by the terminal device includes: receiving, by the terminal device, first configuration information sent by a network device, where the first configuration information includes the first indication information.

In this embodiment, the first indication information is issued by the network device, and the network device may specifically send the first indication information to the terminal device through the first configuration information, that is, the first configuration information carries or Include the first indication information.

Optionally, the terminal device receiving the first configuration information sent by the network device includes: the terminal device receiving the first configuration information sent by the network device through high-level signaling.

Exemplarily, the high-level signaling may be, for example, radio resource control (RRC, Radio Resource Control) signaling, that is, the network device may send the first configuration information to the terminal device through the RRC signaling, and the first configuration information carries Or include the first indication information. Of course, the high-level signaling in this embodiment is not limited to RRC signaling, and other types of high-level signaling are also within the protection scope of the embodiment of the present invention.

Optionally, the first configuration information further includes: the size of an indication field in the PDCP packet header used to indicate the length of the data packet; and/or, an option used to indicate the concatenation rule of the data packet.

Wherein, the size of the indication field used to indicate the length of the data packet in the PDCP packet header included in the first configuration information refers to the size of the received upper layer data packet or the size of the compressed upper layer data packet. Exemplarily, when the PDCP entity receives an upper layer data packet (without data packet concatenation), and intends to concatenate the upper layer data packet according to the first indication information in the first configuration information, the indication for indicating the length of the data packet The field size indicates the size of each received upper-layer data packet, or the PDCP entity compresses and encrypts the header of the received upper-layer data packet, then the indication field size used to indicate the length of the data packet indicates the compressed upper-layer The size of the packet.

In some optional embodiments, the first indication information further includes at least one of the following information: the size of the indication field in the PDCP packet header used to indicate the length of the data packet; an option used to indicate the concatenation rule of the data packet.

Wherein, the size of the indication field used to indicate the length of the data packet in the PDCP packet header included in the first indication information refers to the size of the received upper layer data packet or the size of the compressed upper layer data packet. Exemplarily, when the PDCP entity receives an upper-layer data packet (without data packet concatenation), and intends to concatenate the upper-layer data packet according to the first indication information, the size of the indication field used to indicate the length of the data packet indicates that the received The size of each upper-layer data packet, or the PDCP entity compresses and encrypts the header of the received upper-layer data packet, then the size of the indication field used to indicate the length of the data packet indicates the size of the compressed upper-layer data packet.

Optionally, the option for indicating the data packet concatenation rule includes one of the following:

option to indicate concatenated packet size;

option to indicate the number of concatenated packets;

Options for different concatenated packet sizes or number of concatenated packets for different predicted transport block sizes;

For different predicted uplink resource allocation sizes, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers;

For different predicted channel qualities, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers.

In this embodiment, the option for indicating a data packet concatenation rule may specifically be a PDCP data packet concatenation rule. As a first example, the option used to indicate the size of the concatenated data packet can be, for example, 500 bytes, 1000 bytes or 1500 bytes, that is, the PDCP data packet concatenation is performed according to the above-mentioned 500 bytes, 1000 bytes or 1500 bytes , the size of the concatenated PDCP data packet is not greater than 500 bytes, 1000 bytes or 1500 bytes; of course, this embodiment is not limited to the size of the concatenated data packet listed above, and may also be other numbers of bytes. As a second example, the option used to indicate the number of concatenated data packets, for example, can be 2, 5 or 10, etc., indicating the number of concatenated PDCP data packets. Of course, this embodiment is not limited to the concatenated data listed above. The number of packets, and can also be other concatenated packet quantities. As a third example, for different predicted transport block sizes, there are corresponding options for different concatenated data packet sizes or the number of concatenated data packets, for example, for a certain type of predicted transport block size (for example, the predicted transport block size is in a certain interval , or does not exceed a certain threshold), configure the corresponding concatenated data packet size or the number of concatenated data packets. As a fourth example, for different predicted uplink resource allocation sizes, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers, for example, for a certain type of uplink resource allocation size (for example, the uplink resource allocation size is in a certain interval, or not exceeding a certain threshold), configure the corresponding concatenated data packet size or the number of concatenated data packets. As a fifth example, for different predicted channel qualities, there are corresponding options for different concatenated data packet sizes or the number of concatenated data packets. For example, if the predicted channel quality is higher than the threshold 1 and lower than the threshold 2, then configure the corresponding concatenated data The number of packets is the specified number, or the size of the corresponding concatenated data packet is configured to be the specified bit.

In some other optional embodiments, the terminal device receiving the first indication information includes: a PDCP entity of the terminal device receiving the first indication information sent by a MAC entity.

In this embodiment, the first indication information received by the PDCP entity of the terminal device is sent by the MAC entity. Exemplarily, the MAC entity of the terminal device has artificial intelligence (AI, Artificial Intelligence) capability, or has a decision-making or control capability, and can decide whether to enable PDCP data packet concatenation based on the current situation, that is, the terminal device's The PDCP entity receives the first indication information sent by the MAC entity.

In some optional embodiments of the present invention, the first indication information is also used to indicate the activated option for indicating the data packet concatenation rule, and the option for indicating the data packet concatenation rule is configured by the network device, Either it is predefined by the terminal device, or it is specified by a protocol.

In this embodiment, the first indication information is also used to indicate the activated option for indicating the data packet concatenation rule, and the option for indicating the data packet concatenation rule includes one of the following: for indicating the concatenation data packet Size options; options for indicating the number of concatenated data packets; for different predicted transport block sizes, corresponding to different concatenated data packet sizes or options for concatenated data packets; for different predicted uplink resource allocation sizes, corresponding to different The option of the size of the concatenated data packet or the number of concatenated data packets; for different predicted channel qualities, corresponding options of different concatenated data packet sizes or the number of concatenated data packets.

In some optional embodiments of the present invention, the method further includes: the PDCP entity of the terminal device receives at least one of the following information sent by the MAC entity:

predicted transport block size;

Predicted uplink resource allocation size;

Predicted channel quality.

Exemplarily, as shown in FIG. 2, the MAC entity of the terminal device may send to the PDCP entity the above-mentioned first indication information for indicating whether to enable PDCP packet concatenation, and may also send a predicted transport block (TB, Transport Block) size , at least one piece of information among predicted uplink resource allocation size and predicted channel quality.

Optionally, before the PDCP entity of the terminal device receives the at least one type of information sent by the MAC entity, and/or before the PDCP entity of the terminal device receives the first indication information sent by the MAC entity The method further includes: the PDCP entity of the terminal device sends indication information to the MAC entity, where the indication information is used to indicate the PDCP packet size that the PDCP entity can concatenate.

Wherein, for example, the predicted uplink resource allocation size may include, for example, the predicted uplink time domain resource allocation size and/or the predicted uplink frequency domain resource allocation size, and the uplink time domain resource may be any The time domain resources and the uplink frequency domain resources may be any frequency domain resources involved in uplink transmission, which are not limited in this embodiment.

Wherein, for example, the predicted channel quality may specifically be the value of a predicted channel quality indicator (CQI, Channel Quality Indicator). Of course, the predicted channel quality in this embodiment is not limited to this, and other values can reflect Parameters of channel quality may also be within the protection scope of the embodiments of the present invention.

In some optional embodiments of the present invention, the method further includes: the terminal device sending capability information to the network device, where the capability information includes at least one of the following information:

Whether the terminal device supports the PDCP packet concatenation function;

Whether the terminal device supports the uplink PDCP packet concatenation function;

Whether the terminal device supports the downlink PDCP packet concatenation function.

In some optional embodiments of the present invention, the method further includes: the PDCP entity of the terminal device sends PDCP data based on the first indication information, and when the first indication information indicates that PDCP data packet concatenation is enabled Next, the PDCP data includes concatenated PDCP data packets.

In this embodiment, when the first indication information indicates that PDCP data packet concatenation is enabled, the PDCP entity of the terminal device concatenates the PDCP data packets, that is, at least two PDCP SDUs are concatenated, and the concatenated A packet header is added to the PDCP SDU for transmission; compared with the solution of adding a packet header to each PDCP data packet (PDCP SDU), the technical solution of this embodiment reduces the overhead of the packet header and can also improve L2 processing efficiency.

In some optional embodiments, at least one reserved bit in the packet header of the PDCP data is used to indicate whether to enable concatenation of PDCP data packets.

In this embodiment, at least one reserved bit in the packet header of the PDCP data is used to indicate whether to enable PDCP data packet concatenation to inform the receiving side whether the current PDCP data packet has been concatenated. If concatenated, the receiving side performs processing according to a conventional processing method; if it is indicated that the PDCP data packets are concatenated, the receiving side decomposes the concatenated PDCP data packets according to the instruction, and obtains the decomposed data packets.

Exemplarily, refer to a reserved bit in FIG. 3a and FIG. 3b for "serial indication". For example, when the "concatenation indication" bit is 1, it indicates that the PDCP data packet concatenation is enabled; correspondingly, when the "concatenation indication" position is 0, it indicates that the PDCP data packet concatenation is not enabled. Or vice versa, when the "connection indication" bit is 0, it indicates that the PDCP data packet concatenation is enabled; correspondingly, when the "connection indication" bit is 1, it indicates that the PDCP data packet concatenation is not enabled.

In some optional embodiments, at least two reserved bits in the packet header of the PDCP data are used to indicate the enabled option for indicating the data packet concatenation rule.

Exemplarily, referring to Fig. 3c and Fig. 3d, the two reserved bits are used to indicate the enabled option for indicating the data packet concatenation rule, that is, to indicate the "concatenation option ID". For example, when the "Concatenation Option ID" is set to 00, it indicates the size of the concatenation data packet; when the "Concatenation Option ID" is set to 01, it indicates the number of concatenation data packets; when the "Concatenation Option ID" is set to 10, it indicates For different predicted transport block sizes, the corresponding different concatenated data packet sizes or the number of concatenated data packets; when the "concatenated option ID" is set to 11, it indicates that for different predicted uplink resource allocation sizes, corresponding different concatenated data packets size or number of concatenated packets and so on. Of course, the correspondence between the "concatenation option ID" and the corresponding option for indicating the data packet concatenation rule in this embodiment is not limited to the above example; when there are more options for indicating the data packet concatenation rule, Use more than two reserved bits for indication.

In some optional embodiments, the packet header of the PDCP data further includes at least one first indication field, and the at least one first indication field is used to indicate the size of each received upper layer data packet or the compressed The size of each upper layer packet after.

Exemplarily, as shown in FIG. 3a to FIG. 3d, the header of the PDCP data also includes an L field (that is, the first indication field), which is used to indicate the size of each upper-layer data packet or the compressed upper-layer The size of the data packet, so that the receiving end can decompose or segment the data based on the indication of at least one first indication field.

In some optional embodiments of the present invention, when the terminal device is switched from the first network device to the second network device, the method further includes: the terminal device sends the second network device Sending a first PDCP status report, where the sequence number field in the first PDCP status report is filled with sequence numbers of data packets not received in the first network device.

In this embodiment, in the scenario where the terminal device is handed over from the first network device (such as the source base station) to the second network device (such as the target base station), the terminal device sends the first PDCP status report to the second network device, so The sequence number field in the first PDCP status report is filled with the sequence numbers of the data packets not received in the first network device, so as to realize the transmission state alignment between the terminal device and the second network device.

Exemplarily, as shown in FIG. 4, a reserved bit is used to indicate the serial number (SN, Serial Number) based on the first network device (that is, the source base station), which is used to inform the receiving side that the SN in the PDCP status report is the first The SN of the network device. The First Missing Count (FMC, First Missing Count) field is used to indicate the first missing PDCP packet (ie PDCP SDU) within the reordering window. The bitmap (Bitmap) field is used to indicate which data packets (such as PDCP SDU) are lost and which data packets (such as PDCP SDU) are correctly received.

In some optional embodiments of the present invention, the method further includes: the terminal device receiving a second PDCP status report sent by the second network device, and the sequence number field in the second PDCP status report is filled in Sequence numbers of data packets not received in the first network device.

In this embodiment, in a scenario where the terminal device is handed over from a first network device (such as a source base station) to a second network device (such as a target base station), the terminal device receives the second PDCP status report sent by the second network device, The sequence number field in the second PDCP status report is filled with the sequence numbers of the data packets not received in the first network device, so as to realize the transmission state alignment between the terminal device and the second network device. For an example of the second PDCP status report, refer to FIG. 4 .

Based on the above embodiments, the embodiment of the present invention also provides a data packet concatenation method, which is applied to network devices. FIG. 5 is a second schematic flow diagram of a method for concatenating data packets according to an embodiment of the present invention; as shown in FIG. 5 , the method includes:

Step 201: The network device sends first indication information to the terminal device, the first indication information is used to indicate whether to enable PDCP data packet concatenation; the PDCP data packet concatenation refers to at least two PDCP SDUs before the PDCP entity adds a header for concatenation.

In some optional embodiments of the present invention, the network device sending the first indication information to the terminal device includes: the network device sending first configuration information to the terminal device, the first configuration information including the The first instruction message.

Optionally, the first configuration information further includes: the size of the indication field used to indicate the length of the data packet in the PDCP message header; and/or, the option used to indicate the concatenation rule of the data packet

Optionally, the network device sending the first configuration information to the terminal device includes: the network device sending the first configuration information to the terminal device through high-layer signaling.

In some optional embodiments, the first indication information further includes at least one of the following information: the size of the indication field in the PDCP packet header used to indicate the length of the data packet; an option used to indicate the concatenation rule of the data packet.

Optionally, the option for indicating the data packet concatenation rule includes one of the following:

option to indicate concatenated packet size;

option to indicate the number of concatenated packets;

Options for different concatenated packet sizes or number of concatenated packets for different predicted transport block sizes;

For different predicted uplink resource allocation sizes, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers;

For different predicted channel qualities, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers.

In some optional embodiments of the present invention, the method further includes: the network device receiving the data sent by the terminal device, and when the first indication information indicates that PDCP data packet concatenation is enabled, the data The corresponding PDCP data includes concatenated PDCP data packets.

In some optional embodiments, at least one reserved bit in the packet header of the PDCP data is used to indicate whether to enable concatenation of PDCP data packets.

In some optional embodiments, at least two reserved bits in the packet header of the PDCP data are used to indicate the enabled option for indicating the concatenation rules of PDCP data packets.

In some optional embodiments, the packet header of the PDCP data further includes at least one first indication field, and the at least one first indication field is used to indicate the size of each received upper layer data packet or the compressed The size of each upper layer packet after.

In some optional embodiments of the present invention, when the terminal device is switched from the first network device to the second network device, the method further includes: when the network device is the first network device In the case of a device, the first network device sends the first configuration information to the second network device.

In some optional embodiments of the present invention, when the terminal device is switched from the first network device to the second network device, the method further includes: when the network device is the second network device In the case of a device, the second network device sends the first configuration information to the first network device.

In some optional embodiments of the present invention, the method further includes: the second network device receiving the first PDCP status report sent by the terminal device, and the sequence number field in the first PDCP status report is filled in Sequence numbers of data packets not received in the first network device.

In some optional embodiments of the present invention, the method further includes: the second network device sending a second PDCP status report to the terminal device, and the sequence number field in the second PDCP status report is filled in the The sequence number of the data packet not received in the first network device.

In some optional embodiments of the present invention, the method further includes: the network device receiving capability information sent by the terminal device, where the capability information includes at least one of the following information:

Whether the terminal device supports the PDCP packet concatenation function;

Whether the terminal device supports the uplink PDCP packet concatenation function;

Whether the terminal device supports the downlink PDCP packet concatenation function.

The method for concatenating data packets in the embodiment of the present invention will be described below in conjunction with a specific example.

FIG. 6 is a schematic diagram of an interaction flow of a method for concatenating data packets according to an embodiment of the present invention; as shown in FIG. 6 , the source base station is equivalent to the first network device, and the target base station is equivalent to the second network device. The methods include:

Step 301: The source base station sends configuration information to the target base station, where the configuration information includes first indication information.

Optionally, step 302 may also be included: the target base station sends configuration information to the source base station, where the configuration information includes first indication information.

In this embodiment, the execution order of steps 301 to 302 is not limited to the above-mentioned execution order, and step 302 may be executed first, and then step 301 may be executed, or step 301 and step 302 may be executed at the same time, which is not mentioned in this embodiment Do limited. In addition, step 302 is an optional step.

The foregoing configuration information is equivalent to the first configuration information in the foregoing embodiments, and its specific implementation manner may refer to the foregoing embodiments, and details are not repeated here.

Step 303: the source base station sends a handover command to the UE.

Step 304: the UE sends a first PDCP status report to the target base station.

Step 305: the target base station sends a second PDCP status report to the UE.

Data transmission between the UE and the target base station based on the target base station SN.

For seamless handover, similar to related technical solutions, for downlink data transmission, the source base station forwards PDCP SDUs that have not been transmitted or downlink data that has not been processed by PDCP to the target base station. The downlink data that has completed PDCP SDU transmission does not need to be forwarded to the target base station. For data of part of the PDCP SDU that has been transmitted but still has part of the RLC PDU, the source base station discards the remaining RLC PDU, that is, discards the PDCP SDU. For uplink data transmission, the UE will send the PDCP SDU data that has not been transmitted in the source base station to the target base station.

For lossless handover, in this embodiment, the source base station configures information (such as the first configuration information carrying the first indication information in the above embodiments, or also called PDCP concatenation configuration information). Further, the UE receives a handover command sent by the source base station, and performs handover; after handover to the target base station, data transmission between the UE and the target base station is based on the target base station SN.

The UE sends a first PDCP status report to the target base station, and the SN in the first PDCP status report is the SN of the source base station. After switching to the target base station, the UE can perform new or retransmission of data according to the SN number of the target base station. The UE will start from the first PDCP SDU that has not been confirmed in the source base station, and retransmit the PDCP SDU packets after the unconfirmed PDCP SDU (which may include PDCP SDUs received by the source base station but not confirmed by the UE) ).

The target base station sends a second PDCP status report to the UE, and the SN in the second PDCP status report is the SN of the source base station. After switching to the target base station, the target base station can perform new or retransmission of data according to the SN of the target base station.

The embodiment of the present invention also provides a device for concatenating data packets, and the device is applied to a terminal device. FIG. 7 is a schematic diagram of the composition and structure of a device for connecting data packets in accordance with an embodiment of the present invention; as shown in FIG. 7 , the device includes a first receiving unit 31 for receiving first indication information, which is used Indicates whether to enable PDCP data packet concatenation; the PDCP data packet concatenation refers to concatenation of at least two PDCP SDUs before the PDCP entity adds a packet header.

In some optional embodiments of the present invention, the first receiving unit 31 is configured to receive first configuration information sent by a network device, where the first configuration information includes the first indication information; the first configuration The information also includes: the size of the indication field used to indicate the length of the data packet in the PDCP message header; and/or, an option used to indicate the concatenation rule of the data packet.

In some optional embodiments of the present invention, the first indication information further includes at least one of the following information:

The size of the indication field used to indicate the length of the data packet in the PDCP message header;

Option to indicate packet concatenation rules.

In some optional embodiments of the present invention, the first receiving unit 31 is configured to receive the first configuration information sent by the network device through high-layer signaling.

In some optional embodiments of the present invention, the first receiving unit 31 is configured to receive the first indication information sent by the MAC entity through the PDCP entity.

In some optional embodiments of the present invention, the first indication information is also used to indicate the activated option for indicating the data packet concatenation rule, and the option for indicating the data packet concatenation rule is configured by the network device, Either it is predefined by the terminal device, or it is specified by a protocol.

In some optional embodiments of the present invention, the first receiving unit 31 is further configured to receive at least one of the following information sent by the MAC entity through the PDCP entity:

predicted transport block size;

Predicted uplink resource allocation size;

Predicted channel quality.

In some optional embodiments of the present invention, the options for indicating the data packet concatenation rule include one of the following:

option to indicate concatenated packet size;

option to indicate the number of concatenated packets;

Options for different concatenated packet sizes or number of concatenated packets for different predicted transport block sizes;

For different predicted uplink resource allocation sizes, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers;

For different predicted channel qualities, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers.

In some optional embodiments of the present invention, the device further includes a first sending unit 32, configured to send PDCP data based on the first indication information, and when the first indication information indicates that PDCP data packet concatenation is enabled Next, the PDCP data includes concatenated PDCP data packets.

In some optional embodiments of the present invention, at least one reserved bit in the header of the PDCP data is used to indicate whether to enable concatenation of PDCP data packets.

In some optional embodiments of the present invention, at least two reserved bits in the packet header of the PDCP data are used to indicate the enabled option for indicating the concatenation rules of PDCP data packets.

In some optional embodiments of the present invention, the packet header of the PDCP data further includes at least one first indication field, and the at least one first indication field is used to indicate the size of each received upper layer data packet Or the size of each upper layer packet after compression.

In some optional embodiments of the present invention, the first sending unit 32 is configured to, when the terminal device switches access from the first network device to the second network device, send the Sending a first PDCP status report, where the sequence number field in the first PDCP status report is filled with sequence numbers of data packets not received in the first network device.

In some optional embodiments of the present invention, the first receiving unit 31 is further configured to receive the second PDCP status report sent by the second network device, and the sequence number field in the second PDCP status report is filled with Sequence numbers of data packets not received in the first network device.

In some optional embodiments of the present invention, the apparatus further includes a first sending unit 32, configured to send capability information to the network device, where the capability information includes at least one of the following information:

Whether the terminal device supports the PDCP packet concatenation function;

Whether the terminal device supports the uplink PDCP packet concatenation function;

Whether the terminal device supports the downlink PDCP packet concatenation function.

In the embodiment of the present invention, the first receiving unit 31 and the first sending unit 32 in the device can pass communication modules (including: basic communication kits, operating systems, communication modules, standardized interfaces and protocols, etc.) in practical applications. ) and transceiver antennas.

The embodiment of the present invention also provides a device for concatenating data packets, and the device is applied to network equipment. Fig. 8 is a schematic diagram 2 of the composition and structure of the device for concatenating data packets according to the embodiment of the present invention; as shown in Fig. The indication information is used to indicate whether to enable PDCP data packet concatenation; the PDCP data packet concatenation means to concatenate at least two PDCP SDUs before the PDCP entity adds a packet header.

In some optional embodiments of the present invention, the second sending unit 41 is configured to send first configuration information to the terminal device, where the first configuration information includes the first indication information; the first The configuration information also includes: the size of the indication field used to indicate the length of the data packet in the PDCP message header; and/or, an option used to indicate the concatenation rule of the data packet.

In some optional embodiments of the present invention, the first indication information further includes at least one of the following information: the size of the indication field used to indicate the length of the data packet in the PDCP packet header;

Option to indicate packet concatenation rules.

In some optional embodiments of the present invention, the options for indicating the data packet concatenation rule include one of the following:

option to indicate concatenated packet size;

option to indicate the number of concatenated packets;

Options for different concatenated packet sizes or number of concatenated packets for different predicted transport block sizes;

For different predicted uplink resource allocation sizes, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers;

For different predicted channel qualities, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers.

In some optional embodiments of the present invention, the second sending unit 41 is configured to send the first configuration information to the terminal device through high-layer signaling.

In some optional embodiments of the present invention, the apparatus further includes a second receiving unit 42, configured to receive data sent by the terminal device, and when the first indication information indicates enabling PDCP data packet concatenation, The PDCP data corresponding to the data includes concatenated PDCP data packets.

In some optional embodiments of the present invention, at least one reserved bit in the header of the PDCP data is used to indicate whether to enable concatenation of PDCP data packets.

In some optional embodiments of the present invention, at least two reserved bits in the packet header of the PDCP data are used to indicate the enabled option for indicating the concatenation rules of PDCP data packets.

In some optional embodiments of the present invention, the packet header of the PDCP data further includes at least one first indication field, and the at least one first indication field is used to indicate the size of each received upper layer data packet Or the size of each upper layer packet after compression.

In some optional embodiments of the present invention, when the terminal device is switched from the first network device to the second network device, and the network device is the first network device, the second The second sending unit 41 is further configured to send the first configuration information to the second network device.

In some optional embodiments of the present invention, when the terminal device is switched from the first network device to the second network device, and the network device is the second network device, the first network device The second sending unit 41 is further configured to send the first configuration information to the first network device.

In some optional embodiments of the present invention, the apparatus further includes a second receiving unit 42, configured to receive the first PDCP status report sent by the terminal device, and the sequence number field in the first PDCP status report is filled with Sequence numbers of data packets not received in the first network device.

In some optional embodiments of the present invention, the second sending unit 41 is further configured to send a second PDCP status report to the terminal device, and the sequence number field in the second PDCP status report is filled in the Sequence numbers of packets not received in the first network device.

In some optional embodiments of the present invention, the apparatus further includes a second receiving unit 42, configured to receive capability information sent by the terminal device, where the capability information includes at least one of the following information:

Whether the terminal device supports the PDCP packet concatenation function;

Whether the terminal device supports the uplink PDCP packet concatenation function;

Whether the terminal device supports the downlink PDCP packet concatenation function.

In the embodiment of the present invention, the second receiving unit 42 and the second sending unit 41 in the device can pass communication modules (including: basic communication kits, operating systems, communication modules, standardized interfaces and protocols, etc.) ) and transceiver antennas.

It should be noted that: when the data packet concatenation device provided by the above-mentioned embodiment performs data packet concatenation, the division of the above-mentioned program modules is used as an example for illustration. In practical applications, the above-mentioned processing can be allocated by different programs as required. Module completion means that the internal structure of the device is divided into different program modules to complete all or part of the processing described above. In addition, the device for concatenating data packets provided in the above embodiment and the embodiment of the method for concatenating data packets belong to the same idea, and the specific implementation process thereof is detailed in the method embodiment, and will not be repeated here.

Based on the foregoing embodiments, an embodiment of the present invention further provides a communication device, where the communication device is the terminal device or the network device in the foregoing embodiments. FIG. 9 is a schematic diagram of the hardware composition structure of the communication device according to the embodiment of the present invention. As shown in FIG. When the processor 51 executes the program, it implements the steps of the data packet concatenation method applied to the terminal device; or, when the processor 51 executes the program, it realizes the data packet concatenation applied to the network device steps of the method.

Optionally, the communication device further includes at least one network interface 53 . Wherein, various components in the communication device are coupled together through the bus system 54 . It can be understood that the bus system 54 is used to realize connection and communication between these components. In addition to the data bus, the bus system 54 also includes a power bus, a control bus and a status signal bus. However, for clarity of illustration, the various buses are labeled as bus system 54 in FIG.

It can be understood that the memory 52 may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memories. Wherein, the non-volatile memory can be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory), Only Memory), Electrically Erasable Programmable Read-Only Memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), Magnetic Random Access Memory (FRAM, Ferromagnetic Random Access Memory), Flash Memory (Flash Memory), Magnetic Surface Memory , CD, or CD-ROM (CD-ROM, Compact Disc Read-Only Memory); the magnetic surface storage can be disk storage or tape storage. The volatile memory may be random access memory (RAM, Random Access Memory), which is used as an external cache. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM, Static Random Access Memory), Synchronous Static Random Access Memory (SSRAM, Synchronous Static Random Access Memory), Dynamic Random Access Memory Memory (DRAM, Dynamic Random Access Memory), Synchronous Dynamic Random Access Memory (SDRAM, Synchronous Dynamic Random Access Memory), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM, Double Data Rate Synchronous Dynamic Random Access Memory), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM, Enhanced Synchronous Dynamic Random Access Memory), Synchronous Link Dynamic Random Access Memory (SLDRAM, SyncLink Dynamic Random Access Memory), Direct Memory Bus Random Access Memory (DRRAM, Direct Rambus Random Access Memory) . The memory 52 described in embodiments of the present invention is intended to include, but not be limited to, these and any other suitable types of memory.

The methods disclosed in the foregoing embodiments of the present invention may be applied to the processor 51 or implemented by the processor 51 . The processor 51 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 51 or instructions in the form of software. The aforementioned processor 51 may be a general-purpose processor, DSP, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. The processor 51 may implement or execute various methods, steps and logic block diagrams disclosed in the embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, and the storage medium is located in the memory 52, and the processor 51 reads the information in the memory 52, and completes the steps of the foregoing method in combination with its hardware.

In an exemplary embodiment, the communication device may be implemented by one or more Application Specific Integrated Circuit (ASIC, Application Specific Integrated Circuit), DSP, Programmable Logic Device (PLD, ProgrammableLogic Device), Complex Programmable Logic Device (CPLD, Complex Programmable Logic Device), FPGA, general-purpose processor, controller, MCU, microprocessor (Microprocessor), or other electronic components to implement the foregoing method.

In an exemplary embodiment, the embodiment of the present invention also provides a computer-readable storage medium, such as a memory 52 including a computer program, the above-mentioned computer program can be executed by the processor 51 of the communication device, so as to complete the steps in the foregoing method. The computer-readable storage medium can be FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disk, or CD-ROM, etc.; it can also be various devices including one or any combination of the above-mentioned memories.

The computer-readable storage medium provided by the embodiment of the present invention has a computer program stored thereon, and when the program is executed by the processor, the steps of the method for concatenating data packets applied to the terminal device are realized; or, the program is executed by the processor Steps in implementing the method for concatenating data packets applied to a network device.

The methods disclosed in several method embodiments provided in this application can be combined arbitrarily to obtain new method embodiments under the condition of no conflict.

The features disclosed in several product embodiments provided in this application can be combined arbitrarily without conflict to obtain new product embodiments.

The features disclosed in several method or device embodiments provided in this application can be combined arbitrarily without conflict to obtain new method embodiments or device embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or May be integrated into another system, or some features may be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms of.

The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units; Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention can be integrated into one processing unit, or each unit can be used as a single unit, or two or more units can be integrated into one unit; the above-mentioned integration The unit can be realized in the form of hardware or in the form of hardware plus software functional unit.

Those of ordinary skill in the art can understand that all or part of the steps to realize the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: various media that can store program codes such as removable storage devices, ROM, RAM, magnetic disks or optical disks.

Alternatively, if the above-mentioned integrated units of the present invention are implemented in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for Make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as removable storage devices, ROM, RAM, magnetic disks or optical disks.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (33)

1. A method for data packet concatenation, characterized in that the method comprises: The terminal device receives first indication information, and the first indication information is used to indicate whether to enable the concatenation of PDCP data packets of the packet data convergence protocol; the concatenation of PDCP data packets refers to at least two PDCP service data units before the PDCP entity adds a header SDUs are connected in series. 2. The method according to claim 1, wherein the terminal device receiving the first indication information comprises: The terminal device receives first configuration information sent by a network device, where the first configuration information includes the first indication information; The first configuration information further includes: the size of an indication field in the PDCP message header used to indicate the length of the data packet; and/or, an option used to indicate the concatenation rule of the data packet. 3. The method according to claim 1, wherein the first indication information includes at least one of the following information: The size of the indication field used to indicate the length of the data packet in the PDCP message header; Option to indicate packet concatenation rules. 4. The method according to claim 2, wherein the terminal device receives the first configuration information sent by the network device, comprising: The terminal device receives the first configuration information sent by the network device through high-level signaling. 5. The method according to claim 1, wherein the terminal device receiving the first indication information comprises: The PDCP entity of the terminal device receives the first indication information sent by a medium access control MAC entity. 6. The method according to claim 1, wherein the first indication information is also used to indicate the activated option for indicating the data packet concatenation rule, and the option for indicating the data packet concatenation rule is the network The device is configured, or is predefined by the terminal device, or is stipulated by a protocol. 7. The method according to claim 5, wherein the method further comprises: The PDCP entity of the terminal device receives at least one of the following information sent by the MAC entity: predicted transport block size; Predicted uplink resource allocation size; Predicted channel quality. 8. The method according to claim 2, 3 or 6, wherein the option for indicating the data packet concatenation rule includes one of the following: option to indicate concatenated packet size; option to indicate the number of concatenated packets; Options for different concatenated packet sizes or number of concatenated packets for different predicted transport block sizes; For different predicted uplink resource allocation sizes, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers; For different predicted channel qualities, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers. 9. The method according to claim 1, further comprising: The PDCP entity of the terminal device sends PDCP data based on the first indication information, and when the first indication information indicates enabling concatenation of PDCP data packets, the PDCP data includes concatenated PDCP data packets. 10. The method according to claim 9, wherein at least one reserved bit in the packet header of the PDCP data is used to indicate whether to enable PDCP data packet concatenation. 11. The method according to claim 9, wherein at least two reserved bits in the packet header of the PDCP data are used to indicate the enabled option for indicating the concatenation rules of PDCP data packets. 12. The method according to claim 10 or 11, wherein the packet header of the PDCP data further includes at least one first indication field, and the at least one first indication field is used to indicate that each received The size of each upper-layer data packet or the size of each upper-layer data packet after compression. 13. The method according to claim 9, wherein when the terminal device is switched from the first network device to the second network device, the method further comprises: The terminal device sends a first PDCP status report to the second network device, and the sequence number field in the first PDCP status report is filled with sequence numbers of data packets not received in the first network device. 14. The method of claim 13, further comprising: The terminal device receives the second PDCP status report sent by the second network device, and the sequence number field in the second PDCP status report is filled with sequence numbers of data packets not received by the first network device. 15. The method according to any one of claims 1 to 7, further comprising: The terminal device sends capability information to the network device, where the capability information includes at least one of the following information: Whether the terminal device supports the PDCP packet concatenation function; Whether the terminal device supports the uplink PDCP packet concatenation function; Whether the terminal device supports the downlink PDCP packet concatenation function. 16. A method for data packet concatenation, characterized in that the method comprises: The network device sends first indication information to the terminal device, and the first indication information is used to indicate whether to enable PDCP data packet concatenation of the packet data convergence protocol; the PDCP data packet concatenation refers to combining at least two PDCP packets before the PDCP entity adds a header Service Data Units SDUs are concatenated. 17. The method according to claim 16, wherein the network device sends the first indication information to the terminal device, comprising: The network device sends first configuration information to the terminal device, where the first configuration information includes the first indication information; The first configuration information further includes: the size of an indication field in the PDCP message header used to indicate the length of the data packet; and/or, an option used to indicate the concatenation rule of the data packet. 18. The method according to claim 16, wherein the first indication information further includes at least one of the following information: The size of the indication field used to indicate the length of the data packet in the PDCP message header; Option to indicate packet concatenation rules. 19. The method according to claim 18, wherein the option for indicating the data packet concatenation rule includes one of the following: option to indicate concatenated packet size; option to indicate the number of concatenated packets; Options for different concatenated packet sizes or number of concatenated packets for different predicted transport block sizes; For different predicted uplink resource allocation sizes, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers; For different predicted channel qualities, there are corresponding options for different concatenated data packet sizes or concatenated data packet numbers. 20. The method according to claim 17, wherein the network device sends the first configuration information to the terminal device, comprising: The network device sends the first configuration information to the terminal device through high-layer signaling. 21. The method according to any one of claims 16 to 20, further comprising: The network device receives the data sent by the terminal device, and in a case where the first indication information indicates enabling concatenation of PDCP data packets, the PDCP data corresponding to the data includes concatenated PDCP data packets. 22. The method according to claim 21, wherein at least one reserved bit in the packet header of the PDCP data is used to indicate whether to enable PDCP data packet concatenation. 23. The method according to claim 21, wherein at least two reserved bits in the packet header of the PDCP data are used to indicate the enabled option for indicating the concatenation rules of PDCP data packets. 24. The method according to claim 22 or 23, wherein the packet header of the PDCP data further includes at least one first indication field, and the at least one first indication field is used to indicate that each received The size of each upper-layer data packet or the size of each upper-layer data packet after compression. 25. The method according to any one of claims 17 to 20, wherein when the terminal device is switched from the first network device to the second network device, the method further comprises: If the network device is the first network device, the first network device sends the first configuration information to the second network device. 26. The method according to any one of claims 17 to 20, wherein when the terminal device is switched from the first network device to the second network device, the method further comprises: If the network device is the second network device, the second network device sends the first configuration information to the first network device. 27. The method of claim 26, further comprising: The second network device receives the first PDCP status report sent by the terminal device, and the sequence number field in the first PDCP status report is filled with sequence numbers of data packets not received by the first network device. 28. The method of claim 26, further comprising: The second network device sends a second PDCP status report to the terminal device, and the sequence number field in the second PDCP status report is filled with sequence numbers of data packets not received in the first network device. 29. The method according to any one of claims 16 to 20, further comprising: The network device receives the capability information sent by the terminal device, where the capability information includes at least one of the following information: Whether the terminal device supports the PDCP packet concatenation function; Whether the terminal device supports the uplink PDCP packet concatenation function; Whether the terminal device supports the downlink PDCP packet concatenation function. 30. A device for concatenating data packets, characterized in that the device is applied to terminal equipment; the device includes a first receiving unit for receiving first indication information, and the first indication information is used to indicate whether Enable the concatenation of PDCP data packets of the packet data convergence protocol; the concatenation of PDCP data packets refers to the concatenation of at least two PDCP service data units (SDUs) before the PDCP entity adds a packet header. 31. A device for concatenating data packets, characterized in that the device is applied to network equipment; the device includes a second sending unit for sending first indication information to terminal equipment, and the first indication information is used Indicates whether to enable PDCP data packet concatenation; the PDCP data packet concatenation refers to concatenating at least two PDCP service data units (SDUs) before the PDCP entity adds a packet header. 32. A computer-readable storage 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 15 are implemented; or, When the program is executed by the processor, the steps of the method described in any one of claims 16 to 29 are realized. 33. A communication device, comprising a memory, a processor, and a computer program stored in the memory and operable on the processor, characterized in that, when the processor executes the program, any one of claims 1 to 15 is realized the steps of the method; or, The steps of the method described in any one of claims 16 to 29 are implemented when the processor executes the program.

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