CN111385071B

CN111385071B - Data transmission method, device and computer storage medium

Info

Publication number: CN111385071B
Application number: CN201811627355.8A
Authority: CN
Inventors: 赵亚利
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2023-10-20
Anticipated expiration: 2038-12-28
Also published as: CN111385071A

Abstract

The invention discloses a data transmission method, a device and a computer storage medium. In addition, for the network side device, the second data packet sent out contains the second protocol layer sequence number, and the received first data packet contains the first protocol layer sequence number, so that the network side device does not need to rely on the first protocol layer sequence number when determining the second protocol layer sequence number, and further, the situation that the redundant transmission function is not started from 0 when the data packet contained in the data packet is started at the beginning of service transmission is avoided, and the repeated data packet can be normally transmitted while the network side device can normally and effectively work is ensured.

Description

Data transmission method, device and computer storage medium

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, and computer storage medium.

Background

Aiming at IIOT (Industrial Internet of Things ) service, a redundant transmission mechanism is introduced in a high-level in order to improve the reliability of data transmission. The high-layer data packet is duplicated to generate at least two identical data packets, and the two identical data packets are transmitted through different paths respectively, so that the reliability of data transmission is improved.

However, if the redundant transmission mechanism is not started from the beginning of the service transmission (for example, the retransmission cannot be started before the dual connection is not established by the User Equipment (UE)) or the redundant transmission mechanism is not always started, then for the downlink packet processing procedure, it may result in that the Sequence Number (SN) carried in the PDCP header information of the air interface packet to be sent by the radio access network device (Radio Access Network, RAN) is not started from 0 or discontinuous, which is not allowed for the RAN. For the uplink packet processing procedure, it is also possible to cause the SN carried in the GTP-U header information of the uplink packet to be sent by the RAN to not start from 0 or be discontinuous, which is obviously not allowed for the RAN.

Disclosure of Invention

The embodiment of the invention provides a data transmission method, data transmission equipment and a computer storage medium, which are used for realizing normal transmission of repeated data packets regardless of when a redundant transmission function is started.

In a first aspect, an embodiment of the present invention provides a data transmission method, which is applicable to a processing procedure of an uplink data packet of a user equipment, including:

the packet data convergence protocol layer judges whether a specific bearer starts a redundant transmission mechanism according to the specific bearer;

if the data packet is started, carrying out packet duplication processing on the data packet of the specific bearer to generate a repeated uplink data packet, and respectively adding packet data convergence PDCP protocol data unit PDU (packet data convergence protocol) heads for the repeated uplink data packet to generate a corresponding complete PDCP PDU; the PDCP PDU header at least includes a PDCP protocol layer sequence number and a redundant data identifier, where the redundant data identifier in the PDCP PDU corresponding to the repeated uplink data packet has the same value.

In a second aspect, an embodiment of the present invention provides a data transmission method, which is applicable to a processing procedure of a downlink data packet of a user equipment, including:

user equipment receives data packets corresponding to specific bearers from different network side equipment and submits the data packets to a packet data convergence PDCP protocol layer; the data packet submitted to the PDCP protocol layer is a PDCP protocol data unit PDU, and the PDCP PDU header at least comprises a PDCP protocol layer sequence number and a redundant data identifier;

The PDCP protocol layer judges whether the specific bearer starts a redundant transmission mechanism aiming at the specific bearer;

if the PDCP protocol layer is started, when the redundant data identifiers contained in the PDCP PDU heads corresponding to the data packets received from different network side equipment are determined to be the same, the PDCP PDU corresponding to the data packets received from the different network side equipment is determined to be a repeated packet, and repeated elimination is carried out on the repeated packet.

In a third aspect, an embodiment of the present invention provides a data transmission method, which is applicable to a network side device, including:

receiving a first data packet;

converting the first data packet into a second data packet;

transmitting the second data packet;

wherein, the first protocol header of the first data packet includes a first protocol layer sequence number and a redundant data identifier; the second protocol header of the second data packet comprises a second protocol layer sequence number and the redundant data identifier; or the second protocol header of the second data packet comprises a second protocol layer sequence number with the same value as the redundant data identifier;

or, the first protocol header of the first data packet includes a first protocol layer sequence number with the same value as the redundant data identifier, and the second protocol header of the second data packet includes a second protocol layer sequence number and the redundant data identifier.

In a fourth aspect, an embodiment of the present invention provides a data transmission method, which is applicable to a processing procedure of an uplink packet of a user plane function UPF device, including:

the user plane function UPF equipment receives data packets sent by different network side equipment based on a specific user plane tunnel GTP-U respectively; the received data packet is a GTP-U protocol layer data packet, and the GTP-U protocol layer data packet head at least comprises a redundant data identifier and a GTP-U protocol layer sequence number, or the GTP-U protocol layer data packet head at least comprises a GTP-U protocol layer sequence number with the same value as the redundant data identifier;

the GTP-U protocol layer judges whether the specific GTP-U tunnel starts a redundant transmission mechanism aiming at the specific GTP-U tunnel;

if the GTP-U protocol layer is started, determining that the GTP-U protocol layer data packet received from different network side equipment is a repeated packet according to the information of which the value is the same as the redundant data identifier contained in the GTP-U protocol layer data packet header, and executing repeated elimination on the repeated packet.

In a fifth aspect, an embodiment of the present invention provides a data transmission method, which is applicable to a processing procedure of a downlink data packet of a user plane function UPF device, including:

The GTP-U protocol layer judges whether a specific GTP-U tunnel starts a redundant transmission mechanism aiming at the specific GTP-U tunnel;

if the data packet is started, carrying out packet copying processing on the data packet corresponding to the specific GTP-U tunnel to generate a repeated downlink data packet, and respectively adding GTP-U heads into the repeated uplink data packet to obtain a corresponding GTP-U protocol layer data packet; wherein, the GTP-U header at least comprises a GTP-U protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in the repeated GTP-U protocol layer data packets have the same value; or, the GTP-U header at least comprises a GTP-U protocol layer sequence number, and the value of the GTP-U protocol layer sequence number is the same as the redundant data identifier.

In a sixth aspect, an embodiment of the present invention provides a user equipment, including:

a memory for storing program instructions;

and the processor is used for calling the program instructions stored in the memory and executing according to the obtained program:

judging whether a specific bearer starts a redundant transmission mechanism or not according to the specific bearer;

In a seventh aspect, an embodiment of the present invention provides a user equipment, including:

a memory for storing program instructions;

respectively receiving data packets corresponding to specific bearers from different network side equipment and submitting the data packets to a packet data convergence PDCP protocol layer; the data packet submitted to the PDCP protocol layer is a PDCP protocol data unit PDU, and the PDCP PDU header at least comprises a PDCP protocol layer sequence number and a redundant data identifier;

judging whether the specific bearer starts a redundant transmission mechanism or not according to the specific bearer;

if the network side equipment is started, when the redundant data identifiers contained in the PDCPDU headers corresponding to the data packets received from the different network side equipment are determined to have the same value, the PDCP PDU corresponding to the data packets received from the different network side equipment is determined to be a repeated packet, and repeated elimination is carried out on the repeated packet.

In an eighth aspect, an embodiment of the present invention provides a network side device, including:

a memory for storing program instructions;

Receiving a first data packet;

converting the first data packet into a second data packet;

transmitting the second data packet;

In a ninth aspect, an embodiment of the present invention provides a user plane function device, including:

a memory for storing program instructions;

respectively receiving data packets sent by different network side devices based on a specific user plane tunnel GTP-U; the received data packet is a GTP-U protocol layer data packet, and the GTP-U protocol layer data packet head at least comprises a redundant data identifier and a GTP-U protocol layer sequence number, or the GTP-U protocol layer data packet head at least comprises a GTP-U protocol layer sequence number with the same value as the redundant data identifier;

Judging whether the specific GTP-U tunnel starts a redundant transmission mechanism or not according to the specific GTP-U tunnel;

if the network side equipment is started, determining that the GTP-U protocol layer data packet received from the different network side equipment is a repeated packet according to the information of which the value is the same as the redundant data identifier contained in the GTP-U protocol layer data packet header, and executing repeated elimination on the repeated packet.

In a tenth aspect, an embodiment of the present invention provides a user plane function device, including:

a memory for storing program instructions;

judging whether a specific GTP-U tunnel starts a redundant transmission mechanism or not according to the specific GTP-U tunnel;

In an eleventh aspect, an embodiment of the present invention provides a user equipment, including:

a judging unit, configured to judge, for a specific bearer, whether the specific bearer has turned on a redundant transmission mechanism;

the repeated processing unit is used for carrying out packet duplication processing on the data packet of the specific bearer when judging that the specific GTP-U tunnel starts a redundant transmission mechanism, generating repeated uplink data packets, and respectively adding packet data convergence PDCP protocol data unit PDU heads for the repeated uplink data packets so as to generate corresponding complete PDCP PDUs; the PDCP PDU header at least includes a PDCP protocol layer sequence number and a redundant data identifier, where the redundant data identifier in the PDCP PDU corresponding to the repeated uplink data packet has the same value.

In a twelfth aspect, an embodiment of the present invention provides a user equipment, including:

a receiving unit, configured to receive data packets corresponding to specific bearers from different network side devices and submit the data packets to a packet data convergence PDCP protocol layer; the data packet submitted to the PDCP protocol layer is a PDCP protocol data unit PDU, and the PDCP PDU header at least comprises a PDCP protocol layer sequence number and a redundant data identifier;

A judging unit, configured to judge, for the specific bearer, whether the specific bearer has turned on a redundant transmission mechanism;

and the elimination processing unit is used for determining that the PDCP PDU corresponding to the data packet received from the different network side equipment is a repeated packet and executing repeated elimination on the repeated packet when the fact that the redundancy transmission mechanism is started by the specific GTP-U tunnel is determined and the redundant data identifiers contained in the PDCP PDU heads corresponding to the data packets received from the different network side equipment are the same.

In a thirteenth aspect, an embodiment of the present invention provides a network side device, including:

a receiving unit, configured to receive a first data packet;

the conversion unit is used for converting the first data packet into a second data packet;

a transmitting unit, configured to transmit the second data packet;

In a fourteenth aspect, an embodiment of the present invention provides a user plane function device, including:

a receiving unit, configured to receive data packets sent by different network side devices based on a specific user plane tunnel GTP-U respectively; the received data packet is a GTP-U protocol layer data packet, and the GTP-U protocol layer data packet head at least comprises a redundant data identifier and a GTP-U protocol layer sequence number, or the GTP-U protocol layer data packet head at least comprises a GTP-U protocol layer sequence number with the same value as the redundant data identifier;

a judging unit, configured to judge, for the specific GTP-U tunnel, whether the specific GTP-U tunnel has opened a redundant transmission mechanism;

and the duplicate elimination unit is used for determining that the GTP-U protocol layer data packet received from different network side equipment is a duplicate packet according to the information of which the value is the same as the redundant data identifier contained in the GTP-U protocol layer data packet header when judging that the specific GTP-U tunnel starts a redundant transmission mechanism, and executing duplicate elimination on the duplicate packet.

In a fifteenth aspect, an embodiment of the present invention provides a user plane function device, including:

a judging unit, configured to judge, for a specific GTP-U tunnel, whether the specific GTP-U tunnel has opened a redundant transmission mechanism;

The repeated processing unit is used for carrying out packet replication processing on the data packet corresponding to the specific GTP-U tunnel when judging that the specific GTP-U tunnel starts a redundant transmission mechanism, generating repeated downlink data packets, and respectively adding GTP-U heads into the repeated uplink data packets to obtain corresponding GTP-U protocol layer data packets; wherein, the GTP-U header at least comprises a GTP-U protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in the repeated GTP-U protocol layer data packets have the same value; or, the GTP-U header at least comprises a GTP-U protocol layer sequence number, and the value of the GTP-U protocol layer sequence number is the same as the redundant data identifier.

In a sixteenth aspect, an embodiment of the present invention provides a computer storage medium storing computer-executable instructions for causing the computer to perform any one of the above-described data transmission methods.

The invention has the following beneficial effects:

according to the data transmission method, the data transmission device and the computer storage medium, the redundant data identifiers are contained in the data packet header, and the redundant data identifiers contained in the repeated data packets are set to be the same, so that whether the data packets received from different network side devices are the repeated data packets can be determined according to the redundant data identifiers. In addition, for the network side device, the second data packet sent out contains the second protocol layer sequence number, and the received first data packet contains the first protocol layer sequence number, so that the network side device does not need to rely on the first protocol layer sequence number in the first data packet when determining the second protocol layer sequence number in the second data packet, and further, the situation that the redundant transmission function is not started from 0 when the data packet contained in the data packet is started at the beginning of service transmission is avoided, and the repeated data packet can be normally transmitted while the network side device can normally and effectively work is ensured.

Drawings

Fig. 1 is a schematic diagram of a network structure provided by 3gpp SA2 in the prior art;

fig. 2 is a schematic diagram of a protocol stack of a user equipment, a base station, and a user plane function UPF device in the prior art;

fig. 3 is an interactive flowchart of an uplink packet processing procedure provided in an embodiment of the present invention;

FIG. 4 is a diagram illustrating a PDCP data PDU format provided in an embodiment of the present invention;

fig. 5 is an interactive flowchart of a downlink packet processing procedure provided in an embodiment of the present invention;

fig. 6 is a flowchart of a processing procedure of an uplink packet applicable to a UE according to an embodiment of the present invention;

fig. 7 is a flowchart of a processing procedure of a downlink packet applicable to a UE according to an embodiment of the present invention;

fig. 8 is a flowchart of a data transmission process applicable to a network side device according to an embodiment of the present invention;

fig. 9 is a flowchart of a processing procedure of an uplink packet applicable to a UPF device according to an embodiment of the present invention;

fig. 10 is a flowchart of a processing procedure of a downlink packet applicable to a UPF device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a first user equipment according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a first network side device according to an embodiment of the present invention;

Fig. 13 is a schematic structural diagram of a second user equipment according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a third user equipment according to an embodiment of the present invention;

fig. 15 is a schematic structural diagram of a second network side device according to an embodiment of the present invention;

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

fig. 17 is a schematic structural diagram of a second UPF device according to an embodiment of the present invention.

Detailed Description

The following describes in detail a specific implementation of a data transmission method, apparatus and computer storage medium according to an embodiment of the present invention with reference to the accompanying drawings. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Currently, the 5G NR system mainly supports the following three types of services:

eMBB (enhanced Mobile Broadband), enhanced broadband communication;

mctc (massive Machine Type Communications), a number of machine type communications);

URLLC (Ultra-Reliable and Low Latency Communications, high reliability low latency communication).

For IIOT (Industrial Internet of Things ) services, in essence, high reliability and low latency are generally required, so IIOT can be considered to belong to URLLC service in three major classes of 5G NR services.

To support the high reliability and low latency requirements of IIOT traffic, SA2 introduces a high-level redundancy transport mechanism (Redudant Data Transmission). The high-layer data packet is duplicated to generate at least two identical data packets, and the two identical data packets are transmitted through different paths respectively, so that the reliability of data transmission is improved.

Taking the schematic diagram of the network structure provided by 3gpp SA2 shown in fig. 1 as an example, in the present redundancy transmission mechanism, see the schematic diagram of the protocol stack shown in fig. 2, where application represents an application, PDU (Protocol Data Unit) layer represents a protocol data unit protocol layer, SDAP (Service Data Adaptation Protocol) represents a service data adaptation protocol layer, PDCP (Packet Data Convergence Protocol) represents a packet data convergence protocol layer, RLC (Radio Link Control) represents a radio link control protocol layer, MAC (Media Access Control) represents a medium access control protocol layer, UDP (UserDatagram Protocol) represents a user datagram protocol layer.

The processing procedure of the downlink data packet proposed by SA2 is as follows:

operation performed by the user plane function (User Plane Function, UPF) device: the user plane tunnel (GPRS Tunneling Protocol, GTP-U) protocol layer repeatedly processes the data packet received from the higher layer (i.e. the protocol layer above the GTP-U protocol layer), and for the repeated data packet, the sequence number (denoted by SN 1) of the user plane tunnel protocol layer carried in the GTP-U header information is the same. One of the repeated data packets is then sent to the primary radio access network device and the other repeated data packet is sent to the secondary radio access network device.

Operations performed by the primary radio access network device (Mster Radio Access network, M-RAN) and the secondary radio access network device (Secondary Radio Access network, S-RAN): when a packet is received from the UPF device, GTP-U header information in the packet is removed and then converted to an air interface packet. Extracting SN1 from the original GTP-U header information, and adding the SN1 serving as a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer sequence number in the header information of a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) in an air interface data packet into the PDCP header information; and finally, transmitting the air interface data packet to the user equipment.

Operation performed by User Equipment (UE): receiving air interface data packets from an M-RAN and an S-RAN respectively, and extracting SN1 in PDCP header information in the air interface data packets; if the extracted two SN1 are the same, the received two air interface packets are considered to be duplicate packets, and duplicate cancellation is performed, and then the remaining air interface packets are delivered to a higher layer.

Referring to the protocol stack diagram shown in fig. 2, the processing procedure of the uplink packet proposed by SA2 is as follows:

operations performed by the UE: the PDCP protocol layer repeatedly processes data packets received from a higher layer (i.e., a protocol layer above the PDCP protocol layer), and the PDCP header information of the repeated data packets carries the same packet data convergence protocol layer sequence number (denoted by SN 2). One of the repeated data packets is then sent to the M-RAN and the other repeated data packet is sent to the S-RAN.

Operations performed by the M-RAN and the S-RAN: after receiving the data packet from the UE, extracting SN2 carried in PDCP header information in the data packet; then adding GTP-U header information for the received data packet, and taking the extracted SN2 as a user plane tunnel protocol layer sequence number in the GTP-U header information; and finally, sending the data packet added with the GTP-U header information to UPF equipment.

Operations performed by the UPF device: after receiving the data packets added with GTP-U header information from M-RAN and S-RAN respectively, extracting SN2 in the GTP-U header information, judging whether the two extracted SN2 are the same by a GTP-U protocol layer, if so, considering the data packets received from M-RAN and S-RAN as repeated data packets, executing repeated elimination, and then submitting the rest data packets to a high layer.

In the above-mentioned processing procedure suggested by SA2, there is a problem in that if the redundant transmission function of the higher layer data is not started from the beginning of the service transmission or is not always started, then the SN carried in the PDCP header information may not start from 0 or be discontinuous for the processing procedure of the downlink data packet, which is not allowed for the RAN. For uplink packet processing, the SN carried in the GTP-U header may also be caused to not start from 0 or be discontinuous, which is also not allowed for the RAN, which results in the RAN not working properly and resulting in repeated packets not being transmitted efficiently.

Therefore, an embodiment of the present invention provides a data transmission method, as shown in fig. 3, for an uplink data packet processing process, the method may include:

S301, the PDCP protocol layer judges whether a redundancy transmission mechanism is started by a specific bearing aiming at the specific bearing; if so, executing step S302; if not, transmitting according to the conventional transmission mode of the data packet, and transmitting without adopting a redundant transmission mechanism;

specifically, when determining whether the redundant transmission mechanism is turned on for the specific bearer, the PDCP protocol layer may determine whether the redundant transmission mechanism needs to be turned on for the specific bearer according to a notification of a higher layer.

S302, the PDCP protocol layer performs packet duplication processing on the data packet of the specific bearer to generate a repeated uplink data packet, and adds PDCP protocol data unit (Protocol Data Unit, PDU) heads to the repeated uplink data packet respectively to generate a corresponding complete PDCP PDU;

the PDCP PDU header at least includes a PDCP protocol layer sequence number and a redundant data identifier, and the redundant data identifier in the PDCP PDU corresponding to the repeated uplink data packet has the same value.

Taking the PDCP protocol layer sequence number of 12 bits as an example, the format of PDCP protocol layer Data (Data) PDU is shown in fig. 4, where D/C represents Data/control, R represents reserved bits, PDCP SN represents packet Data convergence protocol layer sequence number, data represents Data, oct represents bytes, optional represents selection, cont represents continuation, and MAC-I (Message Authentication Code for Integrity) represents integrity protected message authentication code.

Assuming that the value of the redundant data identifier occupies 8 bits, and using a 1bit R domain name to indicate whether the PDCP PDU includes the redundant data identifier, that is, whether the R domain name in the diagonal fill area includes the redundant data identifier, for the R domain name in the diagonal fill area, if the value is 0, the PDU may include no redundant data identifier, and if the value is 1, the PDU may include the redundant data identifier.

Of course, the value of the redundant data identifier and the number of occupied bits may be determined according to the actual situation, so long as the repeated data packet can be determined by the redundant data identifier, which is not limited herein.

S303, the UE transmits repeated PDCP PDUs containing redundant data identifiers with the same value to different network side devices;

specifically, the different network side devices may be a primary base station and a secondary base station, which is not limited to this, but may be a primary Distributed Unit (DU) and a secondary Distributed Unit DU, or may be a primary centralized Control Unit (CU) and a secondary centralized control Unit CU, and may select which network side devices to send the PDCP PDU to according to actual needs.

In the aspect of 5G RAN (Radio Access Network, wireless access network) architecture, 3GPP performs functional segmentation on the basis of E-UTRA protocol stack through CU/DU architecture scheme. The CU and DU are two independent logical units, which can be deployed independently. The CU is an interface anchor point between the access network and the core network, and the CU and the core network are connected through a CN-RAN interface. The DU is a logic unit connecting the CU and an RF (Radio Frequency) unit. For specific functional partitioning and allocation of DUs and CUs, reference is made to the prior art, and is not repeated here.

S304, different network side devices all receive the first data packet and convert the first data packet into a second data packet;

the network side device determines which information is contained in the GTP-U protocol layer packet header of the second data packet according to the transmission requirement of the second data packet negotiated with the UPF device in advance.

For example, when the GTP-U protocol layer requires the GTP-U protocol layer sequence number included in the GTP-U protocol layer packet header to be connected, the second protocol layer header of the second data packet includes the second protocol layer sequence number and the redundant data identifier, that is, the GTP-U protocol layer packet header includes the GTP-U protocol layer sequence number and the redundant data identifier, so that the UPF device can determine the repeated GTP-U protocol layer packet according to the redundant data identifier.

Thus, converting the first data packet into the second data packet may specifically include:

extracting redundant data identifiers contained in the PDCP PDU header;

converting PDCP PDU into GTP-U protocol layer data packet; the GTP-U protocol layer data packet header at least comprises a GTP-U protocol layer sequence number and an extracted redundant data identifier.

Illustratively, the GTP-U protocol layer sequence number (denoted by SN 2) contained in the GTP-U protocol layer packet (i.e., second packet) header may be different from the PDCP protocol layer sequence number (denoted by SN 1) contained in the PDCP PDU (i.e., first packet) header, SN1 may represent the transmission order of PDCP PDUs, and SN2 may represent the transmission order of GTP-U protocol layer packets, that is, SN2 is determined according to the transmission order of GTP-U protocol layer packets themselves, and has no relation with the value of SN 1.

Thus, when the redundant transmission function is not started at the beginning of service transmission, the SN2 contained in the GTP-U protocol layer packet header can still be guaranteed to start from 0 or to be continuous, so that the network side equipment (such as a base station) can be guaranteed to work normally, and meanwhile, the effective transmission of repeated data packets can be guaranteed.

For another example, when the GTP-U protocol layer does not require the GTP-U protocol layer sequence number included in the GTP-U protocol layer packet header to be connected, the second protocol layer header of the second data packet includes a second protocol layer sequence number having the same value as the redundant data identifier, that is, the value of the redundant data identifier is added as the GTP-U protocol layer sequence number to the GTP-U header of the second data packet, so that the UPF device can determine the repeated GTP-U protocol layer packet according to the GTP-U protocol layer sequence number, and in essence, the UPF device also determines the repeated GTP-U protocol layer packet according to the redundant data identifier.

extracting redundant data identifiers contained in the PDCP PDU header;

converting PDCP PDU into GTP-U protocol layer data packet; the GTP-U protocol layer data packet header at least comprises a GTP-U protocol layer sequence number with the same value as the extracted redundant data identifier.

In this way, since the GTP-U protocol layer does not require that the GTP-U protocol layer sequence number (denoted by SN 2) contained in the GTP-U protocol layer packet header be consecutive, the SN2 value may be set arbitrarily, for example, such that the SN2 value is the same as the redundant data identifier, that is, the SN2 value is added to the GTP-U protocol layer packet header as the SN2 value.

Therefore, the method not only can reduce the information carried in the GTP-U protocol layer data packet header and reduce the occupation of transmission resources, but also can ensure the effective transmission of repeated data packets, and in addition, can ensure that UPF equipment can judge the repeated data packets to execute the repeated elimination process.

S305, different network side devices all send second data packets to UPF devices;

s306, the UPF equipment respectively receives data packets sent by different network side equipment based on a specific GTP-U tunnel;

the received data packet is a GTP-U protocol layer data packet, and the GTP-U protocol layer data packet head at least comprises a redundant data identifier and a GTP-U protocol layer sequence number, or the GTP-U protocol layer data packet head at least comprises a GTP-U protocol layer sequence number with the same value as the redundant data identifier.

S307, the GTP-U protocol layer judges whether the specific GTP-U tunnel starts a redundant transmission mechanism aiming at the specific GTP-U tunnel; if so, executing step S308; if not, processing the received data packet in a conventional manner without repeated elimination;

And S308, the GTP-U protocol layer determines that the GTP-U protocol layer data packet received from different network side equipment is a repeated packet according to the information of which the value is the same as the redundant data identifier contained in the GTP-U protocol layer data packet header, and executes repeated elimination on the repeated packet.

Wherein, the second data packets respectively received from different network side devices can be temporarily called a second first data packet and a second data packet.

When the GTP-U protocol layer requires the GTP-U protocol layer sequence number contained in the GTP-U protocol layer data packet header to be connected, the GTP-U protocol layer headers of the received second first data packet and second data packet both contain the GTP-U protocol layer sequence number and the redundant data identifier, at this time, whether the redundant data identifiers contained in the GTP-U protocol layer data packet headers received from different network side devices are the same or not is judged, namely, whether the redundant data identifiers in the second first data packet and the second data packet are the same or not is judged, if so, the second data packet and the second data packet are repeated data packets can be indicated, and the GTP-U protocol layer data packets received from different network side devices can be determined to be repeated data packets.

Or when the GTP-U protocol layer does not require the GTP-U protocol layer sequence number contained in the GTP-U protocol layer packet header to be connected, the GTP-U protocol layer headers of the received second first data packet and the second data packet both contain GTP-U protocol layer sequence numbers with values identical to the redundant data identifiers, at this time, it is determined whether the GTP-U protocol layer sequence numbers contained in the GTP-U protocol layer packet headers received from different network side devices are identical, that is, whether the GTP-U protocol layer sequence numbers in the second data packet and the second data packet are identical is determined, if so, it can be stated that the second data packet and the second data packet are duplicate data packets, that is, it can be determined that the GTP-U protocol layer data packets received from different network side devices are duplicate data packets.

Based on the same inventive concept, the embodiment of the present invention provides a data transmission method, as shown in fig. 5, for a processing procedure of a downlink data packet, the method may include:

s501, a GTP-U protocol layer judges whether a specific GTP-U tunnel starts a redundant transmission mechanism according to the specific GTP-U tunnel; if yes, executing step S502; if the data packet is not started, the data packet is transmitted according to a conventional data packet transmission mode, and a redundant transmission mechanism is not adopted for transmission;

s502, carrying out packet replication processing on the data packet corresponding to the specific GTP-U tunnel by the GTP-U protocol layer to generate a repeated downlink data packet, and respectively adding GTP-U heads into the repeated uplink data packet to obtain a corresponding GTP-U protocol layer data packet;

if the GTP-U protocol layer requires that the GTP-U protocol layer sequence numbers contained in the GTP-U protocol layer packet header are consecutive, the GTP-U protocol layer packet header at least contains the GTP-U protocol layer sequence numbers and the redundant data identifiers, and the redundant data identifiers in the repeated GTP-U protocol layer packet are the same in value, that is, the redundant data identifiers are used to represent the repeated GTP-U protocol layer packet.

Or if the GTP-U protocol layer does not require that the GTP-U protocol layer sequence numbers contained in the GTP-U protocol layer packet header be consecutive, the GTP-U protocol layer packet header at least contains a GTP-U protocol layer sequence number having the same value as the redundant data identifier, and the GTP-U protocol layer sequence numbers contained in the repeated GTP-U protocol layer packet header have the same value, that is, the repeated GTP-U protocol layer packet is represented by the GTP-U protocol layer sequence number.

In this way, since the GTP-U protocol layer does not require that the GTP-U protocol layer sequence number (denoted by SN 2) included in the GTP-U protocol layer packet header is continuous, the SN2 value may be set arbitrarily, for example, the SN2 value is the same as the redundant data identifier, that is, the value of the redundant data identifier is added to the PDCP PDU header as the SN2, so as to facilitate the subsequent determination of the repeated data packet.

S503, the UPF equipment sends repeated GTP-U protocol layer data packets to different network side equipment;

s504, receiving the first data packet by different network side devices, and converting the first data packet into a second data packet;

the network side device determines how to extract the redundant data identifier from the first data packet according to the transmission requirement of the first data packet negotiated with the UPF device in advance.

For example, when the GTP-U protocol layer requires that the GTP-U protocol layer sequence number included in the GTP-U protocol layer header of the first data packet is continuous, because the first data packet is the GTP-U protocol layer data packet, and the GTP-U protocol layer data packet header at least includes the first protocol layer sequence number and the redundant data identifier, the converting the first data packet into the second data packet may specifically include:

extracting redundant data identifiers contained in a GTP-U protocol layer data packet header;

Converting GTP-U protocol layer data packets into PDCP PDU; the PDCP PDU header at least includes the extracted redundant data identifier, and may further include a PDCP protocol layer sequence number.

Illustratively, the second data packet is a PDCP PDU, and the PDCP protocol layer sequence number (denoted by SN 1) included in the PDCP PDU header is different from the GTP-U protocol layer sequence number (denoted by SN 2) included in the GTP-U protocol layer data packet (i.e., the first data packet) header, SN2 may represent the transmission order of the first data packet, and SN1 may represent the transmission order of the second data packet, that is, SN1 is determined according to the transmission order of the second data packet itself, and has no relation with the SN2 value.

Thus, when the redundant transmission function is not started at the beginning of service transmission, the SN1 contained in the PDCP PDU header can still be guaranteed to start from 0 or to be continuous, so that the network side equipment (such as a base station) can be guaranteed to work normally, and meanwhile, the effective transmission of repeated data packets can be guaranteed.

For another example, when the GTP-U protocol layer does not require that the GTP-U protocol layer sequence number included in the GTP-U header information of the first data packet is continuous, the first data packet is a GTP-U protocol layer data packet, and the GTP-U protocol layer data packet header includes at least the GTP-U protocol layer sequence number having the same value as the redundant data identifier, so the converting the first data packet into the second data packet may specifically include:

Extracting a GTP-U protocol layer sequence number contained in a GTP-U protocol layer data packet header;

the extracted GTP-U protocol layer sequence number is used as a redundant data identifier;

Illustratively, unlike the PDCP layer sequence number (denoted SN 1) contained in the GTP-U layer packet (i.e., the first packet) header, which is contained in the PDCP PDU (i.e., the second packet) header, the SN2 is substantially the same as the value of the redundant data identifier, and the SN1 may represent the transmission order of the second packet, that is, the SN1 is determined according to the transmission order of the second packet itself, and has no relation with the value of the SN 2.

For PDCP PDUs, taking a PDCP protocol layer sequence number of 12 bits as an example, the format of PDCP datapdus can be also shown in fig. 4, and details can be found in the above description, and the repetition is omitted.

S505, different network side devices all send second data packets to the UE;

s506, respectively receiving data packets corresponding to specific bearers from different network side devices and submitting the data packets to a packet data convergence PDCP protocol layer;

s507, the PDCP protocol layer judges whether a redundancy transmission mechanism is started by the specific bearer according to the specific bearer; if so, executing step S508; if not, the packet is processed in a conventional manner without duplicate elimination, wherein the conventional manner may be any manner of processing known to those skilled in the art;

s508, when the PDCP protocol layer determines that the redundant data identifiers contained in the PDCP PDU heads corresponding to the data packets received from different network side equipment are the same, determining that the PDCP PDU corresponding to the data packets received from different network side equipment is a repeated packet, and executing repeated elimination on the repeated packet;

s509, the PDCP protocol layer submits the PDCP PDU with the duplicate elimination to the higher layer by removing the PDCP PDU header.

Wherein, the second data packets received from different network side devices may be temporarily called a second a data packet and a second b data packet, respectively.

And respectively identifying redundant data identifiers contained in PDCP PDU heads of the second A data packet and the second B data packet, judging whether the values of the redundant data identifiers are the same, if so, indicating that the second A data packet and the second B data packet are repeated data packets, executing repeated elimination processing, and submitting the PDCP PDU heads with the repeated elimination to a high layer.

Based on the same inventive concept, the embodiment of the present invention provides a data transmission method, which is applicable to a transmission process of an uplink data packet of a UE, as shown in fig. 6, and may include:

s601, a PDCP protocol layer judges whether a redundancy transmission mechanism is started by a specific bearing aiming at the specific bearing; if so, executing step S602; if not, ending the flow, and transmitting the data packet according to a conventional mode;

s602, carrying out packet duplication processing on a data packet of a specific bearer to generate a repeated uplink data packet, and respectively adding packet data convergence PDCP data unit PDU (packet data convergence protocol) heads for the repeated uplink data packet to generate a corresponding complete PDCP PDU; the PDCP PDU header at least includes a PDCP protocol layer sequence number and a redundant data identifier, and the redundant data identifier in the PDCP PDU corresponding to the repeated uplink data packet has the same value.

Optionally, the packet data convergence protocol layer determines, for a specific bearer, whether the bearer has a redundant transmission mechanism turned on, including:

the packet data convergence protocol layer determines whether a redundant transport mechanism needs to be turned on for a specific bearer based on the notification of the higher layer.

Optionally, the method further comprises:

the user equipment sends repeated PDCP PDU containing redundant data identification with the same value to different network side equipment.

Optionally, the different network side devices are a main base station and an auxiliary base station respectively;

or, different network side devices are a main distributed unit DU and an auxiliary distributed unit DU respectively;

or, different network side devices are respectively a main centralized control unit CU and an auxiliary centralized control unit CU.

Based on the same inventive concept, the embodiment of the present invention provides a data transmission method, which is applicable to a processing procedure of a downlink data packet of a UE, as shown in fig. 7, and may include:

s701, the user equipment receives data packets corresponding to specific bearers from different network side equipment and submits the data packets to a packet data convergence PDCP protocol layer; the data packet submitted to the PDCP protocol layer is a packet data convergence PDCP protocol data unit PDU, and the PDCP PDU header at least comprises a PDCP protocol layer sequence number and a redundant data identifier;

s702, the PDCP protocol layer judges whether a redundancy transmission mechanism is started by a specific bearing aiming at the specific bearing; if so, execute step S703; if not, ending the flow;

s703, when determining that the redundant data identifiers included in the PDCP PDU headers corresponding to the data packets received from the different network side devices are the same, the PDCP protocol layer determines that the PDCP PDU corresponding to the data packet received from the different network side devices is a duplicate packet, and performs duplicate elimination on the duplicate packet.

Optionally, the method further comprises:

the PDCP protocol layer delivers the PDCP PDU with the duplicate elimination to the higher layer.

Based on the same inventive concept, an embodiment of the present invention provides a data transmission method, which is applicable to a network side device, as shown in fig. 8, and may include:

s801, receiving a first data packet;

s802, converting the first data packet into a second data packet;

s803, sending a second data packet;

wherein the first protocol header of the first data packet includes a first protocol layer sequence number and a redundant data identifier; the second protocol header of the second data packet includes a second protocol layer sequence number and a redundant data identifier; or the second protocol header of the second data packet comprises a second protocol layer sequence number with the same value as the redundant data identifier;

or the first protocol header of the first data packet comprises a first protocol layer sequence number with the same value as the redundant data identifier, and the second protocol header of the second data packet comprises a second protocol layer sequence number and the redundant data identifier.

Optionally, the first data packet is a PDCP PDU sent by the user equipment, and the second data packet is a user plane tunnel GTP-U protocol layer data packet sent to the user plane function UPF equipment;

the PDCP PDU header contains a PDCP protocol layer sequence number and a redundant data identifier;

The GTP-U protocol layer data packet head comprises a GTP-U protocol layer sequence number and a redundant data identifier, or the GTP-U protocol layer data packet head comprises a GTP-U protocol layer sequence number with the same value as the redundant data identifier;

converting the first data packet into a second data packet specifically includes:

extracting redundant data identifiers contained in the PDCP PDU header;

converting PDCP PDU into GTP-U protocol layer data packet; the GTP-U protocol layer data packet header at least contains information with the same value as the extracted redundant data identification.

Optionally, when the GTP-U protocol layer requires that the GTP-U protocol layer sequence number contained in the GTP-U protocol layer packet header is connected, the GTP-U protocol layer packet header at least contains the GTP-U protocol layer sequence number and the extracted redundant data identifier;

or when the GTP-U protocol layer does not require the GTP-U protocol layer sequence number contained in the GTP-U protocol layer data packet header to be connected, the GTP-U protocol layer data packet header at least contains the GTP-U protocol layer sequence number with the same value as the extracted redundant data identifier.

Optionally, the first data packet is a GTP-U protocol layer data packet sent by the UPF device, and the second data packet is a PDCP PDU sent to the user device;

converting GTP-U protocol layer data packets into PDCP PDU; the PDCP PDU header at least comprises the extracted redundant data identifier.

Optionally, extracting the redundant data identifier contained in the GTP-U protocol layer packet header specifically includes:

when the GTP-U protocol layer requires the GTP-U protocol layer sequence number contained in the GTP-U protocol layer data packet header to be connected, extracting redundant data identification contained in the GTP-U protocol layer data packet header;

or when the GTP-U protocol layer does not require the GTP-U protocol layer sequence number contained in the GTP-U protocol layer data packet header to be connected, the extracted GTP-U protocol layer sequence number contained in the GTP-U protocol layer data packet header is used as redundant data identification.

Based on the same inventive concept, the embodiment of the present invention provides a data transmission method, which is suitable for a processing procedure of an uplink data packet of a UPF device, as shown in fig. 9, and may include:

s901, the user plane function UPF equipment respectively sends data packets based on a specific GTP-U tunnel from different network side equipment; the received data packet is a GTP-U protocol layer data packet, and the GTP-U protocol layer data packet head at least comprises a redundant data identifier and a GTP-U protocol layer sequence number, or the GTP-U protocol layer data packet head at least comprises a GTP-U protocol layer sequence number with the same value as the redundant data identifier;

S902, a GTP-U protocol layer judges whether a specific GTP-U tunnel starts a redundant transmission mechanism according to the specific GTP-U tunnel; if so, executing step S903; if not, ending the flow;

s903, the GTP-U protocol layer determines that the GTP-U protocol layer data packet received from different network side equipment is a repeated packet according to the information of the same value as the redundant data mark contained in the GTP-U protocol layer data packet header, and executes repeated elimination on the repeated packet.

Optionally, determining that the GTP-U protocol layer data packet received from different network side devices is a duplicate packet according to the information that the value contained in the GTP-U protocol layer data packet header is the same as the redundant data identifier, which specifically includes:

when the GTP-U protocol layer data packet header at least comprises a redundant data identifier and a GTP-U protocol layer sequence number, judging whether the redundant data identifiers contained in the GTP-U protocol layer data packet headers received from different network side equipment are the same or not, and if so, determining that the GTP-U protocol layer data packets received from different network side equipment are repeated packets;

or when the GTP-U protocol layer data packet header at least contains the GTP-U protocol layer sequence number with the same value as the redundant data identifier, judging whether the GTP-U protocol layer sequence numbers contained in the GTP-U protocol layer data packet header received from different network side equipment are the same or not, and if so, determining that the GTP-U protocol layer data packet received from different network side equipment is a repeated packet.

Based on the same inventive concept, the embodiment of the present invention provides a data transmission method, which is suitable for a processing procedure of a downlink data packet of a UPF device, as shown in fig. 10, and may include:

s1001, a GTP-U protocol layer judges whether a specific GTP-U tunnel starts a redundant transmission mechanism according to the specific GTP-U tunnel; if yes, executing step S1002; if not, ending the flow;

s1002, carrying out packet replication processing on a data packet corresponding to a specific GTP-U tunnel, generating a repeated downlink data packet, and adding GTP-U heads for the repeated uplink data packet respectively to obtain a corresponding GTP-U protocol layer data packet; the GTP-U header at least comprises a GTP-U protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in repeated GTP-U protocol layer data packets have the same value; or, the GTP-U head at least comprises a GTP-U protocol layer sequence number, and the value of the GTP-U protocol layer sequence number is the same as the redundant data identifier.

Optionally, the method further comprises:

the user plane function UPF device sends repeated GTP-U protocol layer data packets to different network side devices.

Based on the same inventive concept, an embodiment of the present invention provides a ue, which is suitable for a processing procedure of an uplink packet, as shown in fig. 11, and may include:

a memory 1101 for storing program instructions;

a processor 1102 for calling program instructions stored in the memory 1101, executing according to the obtained program:

if the data packet is started, carrying out packet duplication processing on the data packet of the specific bearer to generate a repeated uplink data packet, and respectively adding packet data convergence PDCP data unit PDU (packet data convergence protocol) heads for the repeated uplink data packet to generate a corresponding complete PDCP PDU; the PDCP PDU header at least includes a PDCP protocol layer sequence number and a redundant data identifier, and the redundant data identifier in the PDCP PDU corresponding to the repeated uplink data packet has the same value.

Optionally, the processor 1102 is specifically configured to:

it is determined whether a redundant transport mechanism needs to be turned on for a particular bearer based on the higher layer notification.

Optionally, the processor 1102 is further configured to:

the repeated PDCP PDUs including the redundant data identities having the same value are transmitted to different network side devices through the transceiver 1103.

Optionally, different network side devices may be the main base station and the auxiliary base station respectively;

or, different network side devices may be a main distributed unit DU and an auxiliary distributed unit DU, respectively;

or, different network-side devices may be the main central control unit CU and the auxiliary central control unit CU, respectively.

As shown in fig. 11, the user equipment further comprises a transceiver 1103 for receiving and transmitting under the control of the processor 1102.

Where in FIG. 11, a bus architecture may comprise any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 1102 and various circuits of memory represented by the memory 1101, are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1103 may be a number of elements, i.e. comprising a transmitter and a receiver, providing a means for communicating with various other apparatus over a transmission medium. The user interface may also be an interface capable of interfacing with an inscribed desired device for a different user device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 1102 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1102 in performing the operations.

The processor 1102 in embodiments of the present application may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (ComplexProgrammable Logic Device, CPLD).

Based on the same inventive concept, the embodiment of the present application provides a ue, which is suitable for a processing procedure of a downlink data packet, and may include:

a memory 1101 for storing program instructions;

receiving data packets corresponding to specific bearers from different network side devices through the transceiver 1103 and submitting the data packets to the packet data convergence PDCP protocol layer; the data packet submitted to the PDCP protocol layer is a PDCP protocol data unit PDU, and the PDCP PDU header at least comprises a PDCP protocol layer sequence number and a redundant data identifier;

Optionally, the processor 1102 is further configured to:

and delivering the PDCP PDU with the duplicate elimination to a higher layer by removing the PDCP PDU header.

Based on the same inventive concept, an embodiment of the present invention provides a network side device, as shown in fig. 12, which may include:

a memory 1201 for storing program instructions;

a processor 1202 for calling program instructions stored in the memory 1201 and executing according to the obtained program:

receiving, by the transceiver 1203, the first data packet;

converting the first data packet into a second data packet;

transmitting the second data packet through the transceiver 1203;

the processor 1202 is specifically configured to:

extracting redundant data identifiers contained in the PDCP PDU header;

the processor 1202 is specifically configured to:

Optionally, the processor 1202 is specifically configured to:

As shown in fig. 12, the user equipment further comprises a transceiver 1203 for receiving and transmitting under the control of the processor 1202.

Where in FIG. 12, a bus architecture may be comprised of any number of interconnected buses and bridges, and in particular one or more processors represented by the processor 1202 and various circuits of memory represented by the memory 1201. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and, therefore, will not be described further herein. The bus interface provides an interface. The transceiver 1203 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 1202 is responsible for managing the bus architecture and general processing, and the memory 1201 may store data used by the processor 1202 in performing operations.

The processor 1202 in embodiments of the present application may be a Central Processing Unit (CPU), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field-programmable gate array (Field-Programmable Gate Array, FPGA), or a complex programmable logic device (Complex Programmable Logic Device, CPLD).

Based on the same inventive concept, the embodiment of the invention provides a user plane function device, which is suitable for the processing process of an uplink datagram and can comprise:

a memory for storing program instructions;

Optionally, the processor is specifically configured to:

Based on the same inventive concept, the embodiment of the present invention provides a user plane function device, which is applicable to a downlink data packet processing process, and may include:

a memory for storing program instructions;

if the data packet is started, carrying out packet copying processing on the data packet corresponding to the specific GTP-U tunnel to generate a repeated downlink data packet, and respectively adding GTP-U heads into the repeated uplink data packet to obtain a corresponding GTP-U protocol layer data packet; the GTP-U header at least comprises a GTP-U protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in repeated GTP-U protocol layer data packets have the same value; or, the GTP-U head at least comprises a GTP-U protocol layer sequence number, and the value of the GTP-U protocol layer sequence number is the same as the redundant data identifier.

Optionally, the processor is further configured to:

and sending the repeated GTP-U protocol layer data packets to different network side devices.

Based on the same inventive concept, an embodiment of the present invention provides a ue, which is suitable for a processing procedure of an uplink packet, as shown in fig. 13, and may include:

a judging unit 1301, configured to judge, for a specific bearer, whether the specific bearer has turned on a redundant transmission mechanism;

a repetition processing unit 1302, configured to perform packet duplication processing on the data packet of the specific bearer when it is determined that the specific GTP-U tunnel starts the redundant transmission mechanism, generate repeated uplink data packets, and add packet data convergence PDCP protocol data unit PDU headers to the repeated uplink data packets, so as to generate corresponding complete PDCP PDUs; the PDCP PDU header at least includes a PDCP protocol layer sequence number and a redundant data identifier, and the redundant data identifier in the PDCP PDU corresponding to the repeated uplink data packet has the same value.

Based on the same inventive concept, an embodiment of the present invention provides a ue, which is suitable for a processing procedure of a downlink data packet, as shown in fig. 14, and may include:

a receiving unit 1401, configured to receive data packets corresponding to specific bearers from different network side devices and submit the data packets to a packet data convergence PDCP protocol layer; the data packet submitted to the PDCP protocol layer is a PDCP protocol data unit PDU, and the PDCP PDU header at least comprises a PDCP protocol layer sequence number and a redundant data identifier;

a judging unit 1402, configured to judge, for a specific bearer, whether the specific bearer has turned on a redundant transmission mechanism;

the cancellation processing unit 1403 is configured to determine that the PDCP PDU corresponding to the data packet received from the different network side device is a duplicate packet and perform duplicate cancellation on the duplicate packet when it is determined that the redundancy data identifier included in the PDCP PDU header corresponding to the data packet received from the different network side device is the same when it is determined that the redundancy transmission mechanism is started by the specific GTP-U tunnel.

Based on the same inventive concept, an embodiment of the present invention provides a network side device, as shown in fig. 15, which may include:

a receiving unit 1501 for receiving a first data packet;

A conversion unit 1502, configured to convert the first data packet into a second data packet;

a transmitting unit 1503, configured to transmit the second data packet;

Based on the same inventive concept, an embodiment of the present invention provides a user plane function device, which is suitable for a processing procedure of an uplink data packet, as shown in fig. 16, and may include:

a receiving unit 1601, configured to receive data packets sent by different network side devices based on a specific user plane tunnel GTP-U, respectively; the received data packet is a GTP-U protocol layer data packet, and the GTP-U protocol layer data packet head at least comprises a redundant data identifier and a GTP-U protocol layer sequence number, or the GTP-U protocol layer data packet head at least comprises a GTP-U protocol layer sequence number with the same value as the redundant data identifier;

A judging unit 1602, configured to judge, for a specific GTP-U tunnel, whether the specific GTP-U tunnel has opened a redundant transmission mechanism;

and the duplicate elimination unit 1603 is configured to determine that the GTP-U protocol layer data packet received from the different network side devices is a duplicate packet according to the information that the value contained in the GTP-U protocol layer data packet header is the same as the redundant data identifier when it is determined that the specific GTP-U tunnel starts the redundant transmission mechanism, and perform duplicate elimination on the duplicate packet.

Based on the same inventive concept, an embodiment of the present invention provides a user plane function device, which is suitable for a processing procedure of a downlink data packet, as shown in fig. 17, and may include:

a judging unit 1701, configured to judge, for a specific GTP-U tunnel, whether the specific GTP-U tunnel has opened a redundant transmission mechanism;

the repetition processing unit 1702 is configured to perform packet duplication processing on a data packet corresponding to a specific GTP-U tunnel when it is determined that the specific GTP-U tunnel has opened a redundant transmission mechanism, generate repeated downlink data packets, and add GTP-U headers to the repeated uplink data packets respectively, so as to obtain corresponding GTP-U protocol layer data packets; the GTP-U header at least comprises a GTP-U protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in repeated GTP-U protocol layer data packets have the same value; or, the GTP-U head at least comprises a GTP-U protocol layer sequence number, and the value of the GTP-U protocol layer sequence number is the same as the redundant data identifier.

Based on the same inventive concept, an embodiment of the present application provides a computer storage medium storing computer executable instructions for causing a computer to perform any one of the above-described data transmission methods.

Computer storage media can be any available media or data storage device that can be accessed by a computer including, but not limited to, magnetic storage (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical storage (e.g., CD, DVD, BD, HVD, etc.), and semiconductor storage (e.g., ROM, EPROM, EEPROM, nonvolatile storage (NAND FLASH), solid State Disk (SSD)), etc.

It should be noted that, in the embodiment of the present application, the user equipment may also be referred to as a Terminal, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), or the like, and the Terminal may optionally have a capability of communicating with one or more core networks via a radio access network (Radio Access Network, RAN), for example, the Terminal may be a Mobile phone (or referred to as a "cellular" phone), or a computer with Mobile properties, or the Terminal may be a portable, pocket, hand-held, computer-built-in or vehicle-mounted Mobile device, for example.

The network-side device may be a base station (e.g., an access point) that refers to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to inter-convert the received air frames with IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate attribute management for the air interface. For example, the base station may be a base station (BTS, base Transceiver Station) in GSM or CDMA, a base station (NodeB) in WCDMA, or an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in LTE, which is not limited in this embodiment.

The above-described method process flow may be implemented in a software program, which may be stored in a storage medium, and which performs the above-described method steps when the stored software program is called.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.

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

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A data transmission method, comprising:

The packet data convergence protocol layer determines whether a redundant transmission mechanism needs to be started for a specific bearing according to the notification of a higher layer;

if the data packet is started, carrying out packet duplication processing on the data packet of the specific bearer to generate a repeated uplink data packet, and respectively adding packet data convergence PDCP protocol data unit PDU (packet data convergence protocol) heads for the repeated uplink data packet to generate a corresponding complete PDCP PDU; the PDCP PDU header at least comprises a PDCP protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in the PDCP PDUs corresponding to the repeated uplink data packets have the same value;

the user equipment sends the repeated PDCP PDU containing the redundant data identification with the same value to different network side equipment; the redundant data identifier is used for the UPF equipment to judge whether the data packet received from the different network side equipment is a repeated packet or not.

2. The method of claim 1, wherein the different network side devices are a primary base station and a secondary base station, respectively;

or, the different network side devices are a main distributed unit DU and an auxiliary distributed unit DU respectively;

or, the different network side devices are a main centralized control unit CU and an auxiliary centralized control unit CU, respectively.

3. A data transmission method, comprising:

4. A method as recited in claim 3, further comprising:

5. A data transmission method, comprising:

receiving a first data packet;

converting the first data packet into a second data packet;

transmitting the second data packet;

6. The method of claim 5, wherein the first packet is a PDCP PDU sent by a user equipment and the second packet is a user plane tunnel GTP-U protocol layer packet sent to a user plane function UPF device;

the PDCP PDU header comprises a PDCP protocol layer sequence number and a redundant data identifier;

the GTP-U protocol layer data packet head comprises a GTP-U protocol layer sequence number and the redundant data identifier, or the GTP-U protocol layer data packet head comprises a GTP-U protocol layer sequence number with the same value as the redundant data identifier;

extracting the redundant data identifier contained in the PDCP PDU header;

converting the PDCP PDU into a GTP-U protocol layer data packet; wherein, the GTP-U protocol layer data packet header at least contains information with the same value as the extracted redundant data identifier.

7. The method of claim 6, wherein when a GTP-U protocol layer requires a GTP-U protocol layer sequence number connection contained in a GTP-U protocol layer packet header, the GTP-U protocol layer packet header contains at least a GTP-U protocol layer sequence number and the extracted redundant data identifier;

8. The method of claim 5, wherein the first data packet is a GTP-U protocol layer data packet sent by a UPF device and the second data packet is a PDCP PDU sent to a user device;

The PDCP PDU header comprises a PDCP protocol layer sequence number and the redundant data identifier;

extracting redundant data identifiers contained in the GTP-U protocol layer data packet header;

converting the GTP-U protocol layer data packet into PDCP PDU; the PDCP PDU header at least comprises the extracted redundant data identifier.

9. The method of claim 8, wherein extracting the redundant data identifier contained in the GTP-U protocol layer packet header specifically comprises:

when a GTP-U protocol layer requires GTP-U protocol layer sequence number connection contained in a GTP-U protocol layer data packet header, extracting redundant data identification contained in the GTP-U protocol layer data packet header;

or when the GTP-U protocol layer does not require the GTP-U protocol layer sequence number contained in the GTP-U protocol layer data packet header to be connected, the extracted GTP-U protocol layer sequence number contained in the GTP-U protocol layer data packet header is used as the redundant data identifier.

10. A data transmission method, comprising:

the user plane function UPF equipment receives data packets sent by different network side equipment based on a specific GTP-U tunnel respectively; the received data packet is a GTP-U protocol layer data packet, and the GTP-U protocol layer data packet head at least comprises a redundant data identifier and a GTP-U protocol layer sequence number, or the GTP-U protocol layer data packet head at least comprises a GTP-U protocol layer sequence number with the same value as the redundant data identifier;

11. The method of claim 10, wherein determining that the GTP-U protocol layer data packet received from a different network side device is a duplicate packet based on information contained in a GTP-U protocol layer data packet header that has the same value as the redundant data identifier, specifically comprises:

12. A data transmission method, comprising:

if the data packet is started, carrying out packet copying processing on the data packet corresponding to the specific GTP-U tunnel to generate a repeated downlink data packet, and respectively adding GTP-U heads into the repeated uplink data packet to obtain a corresponding GTP-U protocol layer data packet; wherein, the GTP-U header at least comprises a GTP-U protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in the repeated GTP-U protocol layer data packets have the same value; or, the GTP-U header at least comprises a GTP-U protocol layer sequence number, and the value of the GTP-U protocol layer sequence number is the same as the redundant data identifier; the UPF equipment sends repeated GTP-U protocol layer data packets to different network side equipment; the redundant data identifier is used for the user equipment to judge whether the data packet received from the different network side equipment is a repeated packet.

13. The method of claim 12, wherein the different network side devices are a primary base station and a secondary base station, respectively;

14. A user device, comprising:

a memory for storing program instructions;

determining whether a redundant transmission mechanism needs to be started for a specific bearing according to the notification of a higher layer;

if the data packet is started, carrying out packet duplication processing on the data packet of the specific bearer to generate a repeated uplink data packet, and respectively adding packet data convergence PDCP protocol data unit PDU (packet data convergence protocol) heads for the repeated uplink data packet to generate a corresponding complete PDCP PDU; the PDCP PDU header at least comprises a PDCP protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in the PDCP PDUs corresponding to the repeated uplink data packets have the same value; transmitting the repeated PDCP PDU containing the redundant data identification with the same value to different network side equipment; the redundant data identifier is used for the UPF equipment to judge whether the data packet received from the different network side equipment is a repeated packet or not.

15. The apparatus of claim 14, wherein the different network side devices are a primary base station and a secondary base station, respectively;

16. A user device, comprising:

a memory for storing program instructions;

if the method is started, when the redundant data identification contained in the PDCP PDU heads corresponding to the data packets received from different network side equipment is determined to have the same value, the PDCP PDU corresponding to the data packets received from different network side equipment is determined to be a repeated packet, and repeated elimination is carried out on the repeated packet.

17. The device of claim 16, wherein the processor is further configured to:

18. A network side device, comprising:

a memory for storing program instructions;

receiving a first data packet;

converting the first data packet into a second data packet;

transmitting the second data packet;

19. The apparatus of claim 18, wherein the first data packet is a PDCP PDU sent by a user equipment and the second data packet is a user plane tunnel GTP-U protocol layer data packet sent to a user plane function UPF device;

the processor is specifically configured to:

extracting the redundant data identifier contained in the PDCP PDU header;

20. The apparatus of claim 19, wherein when a GTP-U protocol layer requires a GTP-U protocol layer sequence number connection contained in a GTP-U protocol layer packet header, the GTP-U protocol layer packet header contains at least a GTP-U protocol layer sequence number and the extracted redundant data identifier;

21. The apparatus of claim 18, wherein the first data packet is a GTP-U protocol layer data packet sent by a UPF device and the second data packet is a PDCP PDU sent to a user device;

the processor is specifically configured to:

22. The apparatus of claim 21, wherein the processor is specifically configured to:

23. A user plane function device, comprising:

a memory for storing program instructions;

24. The apparatus of claim 23, wherein the processor is specifically configured to:

25. A user plane function device, comprising:

a memory for storing program instructions;

if the data packet is started, carrying out packet copying processing on the data packet corresponding to the specific GTP-U tunnel to generate a repeated downlink data packet, and respectively adding GTP-U heads into the repeated uplink data packet to obtain a corresponding GTP-U protocol layer data packet; wherein, the GTP-U header at least comprises a GTP-U protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in the repeated GTP-U protocol layer data packets have the same value; or, the GTP-U header at least comprises a GTP-U protocol layer sequence number, and the value of the GTP-U protocol layer sequence number is the same as the redundant data identifier; transmitting the repeated GTP-U protocol layer data packet to different network side devices; the redundant data identifier is used for the user equipment to judge whether the data packet received from the different network side equipment is a repeated packet.

26. The apparatus of claim 25, wherein the different network side devices are a primary base station and a secondary base station, respectively;

27. A user device, comprising:

a judging unit, configured to determine whether a redundant transmission mechanism needs to be started for a specific bearer according to a notification of a higher layer;

the repeated processing unit is used for carrying out packet duplication processing on the data packet of the specific bearer when judging that the specific GTP-U tunnel starts a redundant transmission mechanism, generating repeated uplink data packets, and respectively adding packet data convergence PDCP protocol data unit PDU heads for the repeated uplink data packets so as to generate corresponding complete PDCP PDUs; the PDCP PDU header at least comprises a PDCP protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in the PDCP PDUs corresponding to the repeated uplink data packets have the same value; the user equipment sends the repeated PDCP PDU containing the redundant data identification with the same value to different network side equipment; the redundant data identifier is used for the UPF equipment to judge whether the data packet received from the different network side equipment is a repeated packet or not.

28. A user device, comprising:

29. A network side device, comprising:

a receiving unit, configured to receive a first data packet;

a transmitting unit, configured to transmit the second data packet;

30. A user plane function device, comprising:

31. A user plane function device, comprising:

the repeated processing unit is used for carrying out packet replication processing on the data packet corresponding to the specific GTP-U tunnel when judging that the specific GTP-U tunnel starts a redundant transmission mechanism, generating repeated downlink data packets, and respectively adding GTP-U heads into the repeated uplink data packets to obtain corresponding GTP-U protocol layer data packets; wherein, the GTP-U header at least comprises a GTP-U protocol layer sequence number and a redundant data identifier, and the redundant data identifiers in the repeated GTP-U protocol layer data packets have the same value; or, the GTP-U header at least comprises a GTP-U protocol layer sequence number, and the value of the GTP-U protocol layer sequence number is the same as the redundant data identifier; transmitting the repeated GTP-U protocol layer data packet to different network side devices; the redundant data identifier is used for the user equipment to judge whether the data packet received from the different network side equipment is a repeated packet.

32. A computer storage medium having stored thereon computer executable instructions for causing the computer to perform the method of any of the preceding claims 1-13.