CN113938977A

CN113938977A - Data transmission method, data transmission device, network side equipment and first terminal

Info

Publication number: CN113938977A
Application number: CN202010676518.2A
Authority: CN
Inventors: 吴昱民
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-07-14
Filing date: 2020-07-14
Publication date: 2022-01-14
Also published as: WO2022012525A1

Abstract

The application discloses a data transmission method, a data transmission device, network side equipment and a first terminal, and belongs to the technical field of communication. The data transmission method applied to the network side equipment comprises the following steps: sending a first message, wherein the first message is used for indicating that the transmission path of the target service is changed from a first transmission path to a second transmission path; receiving a second message sent by a terminal, wherein the second message is used for indicating the receiving state of the terminal on the target service in the first transmission path; and sending the first data of the target service on the second transmission path according to the second message. In the application, when the transmission path of the data is changed, the network side device receives the data receiving state of the source receiving path reported by the terminal, so that the network side device can retransmit the data according to the data receiving state of the terminal, and the repeated transmission of the data can be effectively avoided.

Description

Data transmission method, data transmission device, network side equipment and first terminal

Technical Field

The application belongs to the technical field of communication, and particularly relates to a data transmission method, a data transmission device, a network side device and a first terminal.

Background

In the prior art, a transmission path of data may be changed, and when the transmission path is changed, a network side device usually deletes an original transmission path (source path for short) first, adds a new transmission path, and retransmits data through the new transmission path. This approach may result in the loss of the buffered data of the source path and also requires the repeated transmission of the data that has been transmitted through the source path on the new transmission path, resulting in the reception of a large amount of repeated data by the terminal.

Disclosure of Invention

An object of the embodiments of the present application is to provide a data transmission method, a data transmission apparatus, a network side device, and a first terminal, which can solve the problem of data duplicate transmission caused by a transmission path change.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, a data transmission method is provided, and is applied to a network side device, where the method includes:

sending a first message, wherein the first message is used for indicating that the transmission path of the target service is changed from a first transmission path to a second transmission path;

receiving a second message sent by a terminal, wherein the second message is used for indicating the receiving state of the terminal on the target service in the first transmission path;

and sending the first data of the target service on the second transmission path according to the second message.

In a second aspect, a data transmission apparatus is provided, including:

a first sending module, configured to send a first message, where the first message is used to indicate that a transmission path of a target service is changed from a first transmission path to a second transmission path;

a receiving module, configured to receive a second message sent by a terminal, where the second message is used to indicate a receiving state of the target service in the first transmission path by the terminal;

and a second sending module, configured to send, according to the second message, the first data of the target service over the second transmission path.

In a third aspect, a data transmission method is provided, which is applied to a first terminal, and the method includes:

receiving a first message sent by a network side device, wherein the first message is used for indicating that a transmission path of a target service is changed from a first transmission path to a second transmission path;

and sending a second message to the network side equipment, wherein the second message is used for indicating the receiving state of the first terminal to the target service in the first transmission path.

In a fourth aspect, a data transmission apparatus is provided, including:

a first receiving module, configured to receive a first message sent by a network side device, where the first message is used to indicate that a transmission path of a target service is changed from a first transmission path to a second transmission path;

a sending module, configured to send a second message to the network side device, where the second message is used to indicate a receiving state of the target service at the first transmission path by the first terminal.

In a fifth aspect, a network-side device is provided, which comprises a processor, a memory, and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method according to the first aspect.

In a sixth aspect, there is provided a first terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the method according to the third aspect.

In a seventh aspect, there is provided a readable storage medium on which a program or instructions are stored, which program or instructions, when executed by a processor, implement the steps of the method according to the first aspect, or implement the steps of the method according to the third aspect.

In an eighth aspect, a chip is provided, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a network-side device program or instruction, implement the method according to the first aspect, or implement the method according to the third aspect.

In the embodiment of the application, when the transmission path of the data is changed, the network side device receives the data receiving state of the source receiving path reported by the terminal, so that the network side device can retransmit the data according to the data receiving state of the terminal, and thus, the repeated transmission of the data can be effectively avoided.

Drawings

FIG. 1 is a block diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a flowchart of a data transmission method provided in an embodiment of the present application;

fig. 3 is a structural diagram of a data transmission device according to an embodiment of the present application;

fig. 4 is a flowchart of another data transmission method provided in the embodiment of the present application;

fig. 5 is a block diagram of another data transmission device provided in the embodiment of the present application;

fig. 6 is a block diagram of a communication device provided in an embodiment of the present application;

fig. 7 is a hardware structure diagram of a network side device according to an embodiment of the present application;

fig. 8 is a hardware configuration diagram of a first terminal according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used are interchangeable under appropriate circumstances such that embodiments of the application can be practiced in sequences other than those illustrated or described herein, and the terms "first" and "second" used herein generally do not denote any order, nor do they denote any order, for example, the first object may be one or more. In addition, "and/or" in the specification and the claims means at least one of connected objects, and a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described techniques can be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. However, the following description describes a New Radio (NR) system for purposes of example, and NR terminology is used in much of the description below, although the techniques may also be applied to applications other than NR system applications, such as 6th Generation (6G) communication systems.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: bracelets, earphones, glasses and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network, where the Base Station may be referred to as a node B, an evolved node B, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a WLAN access Point, a WiFi node, a Transmit Receiving Point (TRP), or some other suitable terminology in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only the Base Station in the NR system is taken as an example, but a specific type of the Base Station is not limited.

The data transmission method, the data transmission apparatus, the network side device and the first terminal provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Fig. 2 is a flowchart of a data transmission method provided in an embodiment of the present application, and as shown in fig. 2, the data transmission method is applied to a network side device, and the method includes the following steps:

step 201: and sending a first message, wherein the first message is used for indicating that the transmission path of the target service is changed from the first transmission path to the second transmission path.

In the field of communications technology, services generally include Multicast services, such as MBMS (Multimedia Broadcast Multicast Service), MBS (Broadcast Multicast Service), and unicast services.

MBMS is generally transmitted in two ways: first, the transmission is performed through a PMCH (Physical Multicast Channel) Physical Channel in an MBSFN (Multimedia Broadcast Multicast service Single Frequency Network) subframe, wherein Control information is transmitted through system information (such as SIB13) and an MCCH (Broadcast Control Channel), and data is transmitted through an MTCH (Broadcast Traffic Channel). Second, the data is transmitted through a Physical Downlink Shared Channel (PDSCH) scheduled by a PDCCH (Physical Downlink Control Channel), wherein the Control information is transmitted through system information (e.g., SIB20) and a Single Cell Multicast Control Channel (SC-MCCH), and the data is transmitted through a Single Cell Multicast Traffic Channel (SC-MTCH). The SC-MCCH is transmitted through a PDSCH scheduled by a PDCCH (Single Cell RNTI, Radio Network Temporary Identity) and the SC-MTCH is transmitted through a PDSCH scheduled by G-RNTI PDCCH. The MBS service is generally transmitted through a specific MRB (MBMS Radio Bearer), and the MBS service may be marked by an identifier such as TMGI (Temporary Mobile Group Identity) and QoS flow ID. Unicast traffic is typically transmitted over a particular DRB (Data Radio Bearer).

In the embodiment of the present application, the target service may be understood as a specific service, the target service may be a multicast service or a unicast service, and the network side device may indicate the target service through the indication information. The network side device may indicate the target service through the first message, that is, the first message may include indication information of the target service. The indication information for indicating the target service may include at least one of a Session identifier (e.g., PDU Session-1), a data flow identifier (e.g., QoS flow-1), and a multicast service identifier (e.g., TMGI-1).

In the embodiment of the present application, the change of the transmission path of the target service may include a change of a transmission path of the target service, and may also include a change of a reception path of the target service. That is, the network side device may instruct, through the first message, that the transmission path of the target service is changed from the first transmission path to the second transmission path, so that the network side device may transmit the data of the target service to the terminal through the second transmission path, and the terminal may receive the data of the target service transmitted by the network side device through the reception path corresponding to the second transmission path. The network side device may also instruct, through the first message, the receiving path of the target service to change from the first receiving path to the second receiving path, so that the network side device may send the data of the target service to the terminal through the sending path corresponding to the second receiving path, and the terminal may receive the data of the target service sent by the network side device through the second receiving path.

In this embodiment of the application, the first transmission path may also be referred to as a source path (for example, expressed as a source receiving path, a source sending path, or a source bearer), and the second transmission path may also be referred to as a target path (for example, expressed as a target receiving path, a target sending path, or a target bearer).

In the embodiment of the application, no matter whether the target service is a unicast service or a multicast service, the first transmission path may be a transmission path in a unicast transmission mode or a transmission path in a multicast transmission mode; accordingly, the second transmission path may be a transmission path of a unicast transmission scheme or a transmission path of a multicast transmission scheme.

Optionally, the first transmission path is a transmission path of a unicast transmission mode, and the second transmission path is a transmission path of a multicast transmission mode. For example, the first transmission path is DRB and the second transmission path is MRB. For another example, the first transmission path is a unicast RLC (Radio Link Control) entity of RB-1(Radio Bearer-1), and the second transmission path is a multicast RLC entity of RB-1.

Optionally, the first transmission path is a transmission path of a multicast transmission mode, and the second transmission path is a transmission path of a unicast transmission mode. For example, the first transmission path is an MRB and the second transmission path is a DRB. As another example, the first transmission path is a multicast RLC receiving entity of RB-1 and the second transmission path is a unicast RLC receiving entity of RB-1.

Optionally, the first transmission path and the second transmission path are transmission paths of different radio bearers, respectively. For example, the first transmission path is MRB-1, the second transmission path is DRB-1; or the first transmission path is DRB-2 and the second transmission path is MRB-2.

Optionally, the first transmission path and the second transmission path are different transmission paths of the same radio bearer. For example, bearer 1 has 1 PDCP (Packet Data Convergence Protocol) receiving entity, which is associated with 2 RLC receiving entities, where RLC-1 corresponds to the first transmission path and RLC-2 corresponds to the second transmission path.

As an example, in step 201, the network side device may send a first message to the terminal, where the first message is used to instruct the terminal to change the multicast service of the TMGI-1 in the MRB-1 to the DRB-1 for reception.

Step 202: and receiving a second message sent by the terminal, wherein the second message is used for indicating the receiving state of the terminal on the target service in the first transmission path.

The second message can be transmitted through at least one transmission path of the first transmission path and the second transmission path, so that the transmission reliability of the second message is improved. Assuming that the first message is used to indicate that the receiving path of the target service is changed from the first receiving path to the second receiving path, the terminal may send the second message through the sending path corresponding to the first receiving path. For example, the terminal may send the second message through the uplink sending RLC entity corresponding to the source DRB, may also send the second message through the uplink sending RLC entity corresponding to the target DRB, and may also send the second message through the uplink sending RLC entities corresponding to the source DRB and the target DRB.

Further, the type of the RLC entity of the source path corresponding to the second message may be any one of an UM Mode (Unacknowledged Mode) and an AM Mode (Acknowledged Mode), so as to further improve transmission reliability of the second message.

In this embodiment, the terminal may report the second message to the network side device after receiving the first message, that is, after receiving the message that the transmission path of the target service is changed. Since the second message is used to indicate the receiving state of the target service in the first transmission path, and the second message may be understood as data receiving state information, the terminal reports the second message to the network side device, which may be understood as that the terminal reports the data receiving state of the target service in the source receiving path to the network side device.

In the embodiment of the application, when the transmission path of the target service is changed, the network side device can know the data receiving condition of the terminal on the source receiving path through the data receiving state of the source receiving path reported by the network side device receiving terminal, so that the network side device can be guided to perform data retransmission of the target service, and the network side device is prevented from performing repeated data transmission.

Step 203: and sending the first data of the target service on the second transmission path according to the second message.

In this step, the network side device may determine, according to the data receiving state of the source receiving path reported by the terminal, data of the target service that needs to be retransmitted, that is, first data of the target service, and send the first data of the target service through the second transmission path.

Optionally, the second message includes data packet number information of the target service, where the data packet number information of the target service is used to indicate a receiving state of the terminal on the target service in the first transmission path.

In the embodiment, the receiving state of the terminal to the target service in the first transmission path is indicated through the data packet number information of the target service, and the indicating mode of the receiving state has the characteristics of simplicity, intuition and clearness.

Optionally, the data packet number information of the target service includes any one of:

the number information of the first lost data packet of the terminal on the first transmission path;

the terminal sends the number information of the data packet before the first lost data packet of the first transmission path;

the terminal sends the number information of the data packet after the first lost data packet of the first transmission path;

the number information of the data packet lost by the terminal on the first transmission path;

and the terminal receives the number information of the data packet in the first transmission path.

In this embodiment, the number information of the first missing data packet, the number information of the data packet preceding the first missing data packet, and the number information of the data packet following the first missing data packet may be understood as the number information of the first missing data packet. The terminal may report only the number information of any of the above first lost data packets, and does not report the reception status information of other data packets except the number information of the first lost data packet, so that, for the network side device, all data packets may be retransmitted from the first lost data packet.

In this embodiment of the application, the second message may be used to indicate a receiving state of the terminal for the target service in the first transmission path, and may further include indication information of the first transmission path, for example, the second message may include, in addition to the data packet number information of the target service, indication information of the first transmission path. In this way, the network side device can distinguish the data receiving state information reported by the terminal as the data receiving state information of which first transmission path is aimed at through the second message, so that the network side device can more accurately determine the data needing to be retransmitted on the second transmission path according to the second message.

Optionally, the indication information of the first transmission path includes at least one of a radio bearer identifier (e.g., DRB-1), a data flow identifier (e.g., QoS flow-1), a Session identifier (e.g., PDU Session-1), a logical channel identifier (e.g., LCID-1), a Cell Group identifier (e.g., MCG (Master Cell Group) or SCG (Secondary Cell Group)), and a multicast service identifier (e.g., TMGI-1).

Optionally, the first data of the target service includes:

a first missing data packet of the terminal on the first transmission path and a data packet following the first missing data packet; alternatively, the first and second electrodes may be,

and the terminal loses the data packet on the first transmission path.

In this embodiment, the network side device may send the data packet after the first lost data packet of the first transmission path to the terminal on the second transmission path, that is, all subsequent data packets including the first lost data packet may be sent through the second transmission path from the first lost data packet of the first transmission path. The network side device may also send all data packets lost on the first transmission path to the terminal on the second transmission path, and for a data packet successfully received by the terminal on the first transmission path, the network side device may not repeat sending.

Optionally, if the network side device receives the second messages sent by N terminals, and first lost data packets of the N terminals on the first transmission path are different, where N is an integer greater than 1, the first data of the target service includes:

the earliest data packet of the N terminals in the first lost data packet of the first transmission path and the data packets after the earliest data packet; alternatively, the first and second electrodes may be,

the latest data packet of the first lost data packets of the first transmission path and the data packets after the latest data packet are transmitted by the N terminals.

In this embodiment, when a plurality of terminals report or feed back data reception status information of a target service in a first transmission path to a network side device, the data reception status information reported by the plurality of terminals may be different, for example, a first lost packet in the first transmission path reported by the plurality of terminals may be different. In this case, there are several possible situations that may exist for the first data of the target service sent by the network side device on the second transmission path.

First, the network side device regards the earliest lost data packet among the first lost data packets of the first transmission path of the plurality of terminals as a reference, and takes the earliest lost data packet and the data packets after the earliest lost data packet as data to be retransmitted on the second transmission path. For example, UE-1 reports that the first lost data packet in the first transmission path is data packet-1, UE-2 reports that the first lost data packet in the first transmission path is data packet-2, the earliest lost data packet is data packet-1, and the network side device retransmits the data packet from data packet-1.

The network side device regards a latest lost data packet in the first lost data packet of the first transmission path of the plurality of terminals as a reference, and takes the latest lost data packet and a data packet after the latest lost data packet as data to be retransmitted on the second transmission path. For example, UE-1 reports that the first lost data packet in the first transmission path is data packet-1, UE-2 reports that the first lost data packet in the first transmission path is data packet-2, and then the latest lost data packet is data packet-2, and the network side device starts to retransmit the data packet from data packet-2.

Thirdly, the network side device takes the data packet lost by each terminal on the first transmission path as the data to be retransmitted on the second transmission path.

Optionally, the method further includes:

and sending a third message, where the third message is used to indicate data packet number information corresponding to the first data of the target service in the first transmission path.

In this embodiment, the network side device may send a third message to the terminal, and notify the terminal of the number information corresponding to the first data of the target service in the first transmission path through the third message, so that when the terminal receives the first data of the target service in the second transmission path, the network side device may determine whether to receive or discard the first data of the target service according to the number information of the first data of the target service in the first transmission path.

For example, assuming that the network side device sends the data packet 1/2/3 on the second transmission path and the data packet 1/2/3 has the number of 4/5/6 on the first transmission path, the third message is used to indicate the number information of the data packet 1/2/3 on the first transmission path, i.e., 4/5/6. In this way, the terminal can know that the packet 1/2/3 transmitted by the network side device on the second transmission path corresponds to the packet 4/5/6 originally on the first transmission path.

It should be noted that, in the data transmission method provided in the embodiment of the present application, the execution main body may be a data transmission device, or a control module in the data transmission device for executing the data transmission method. In the embodiment of the present application, a data transmission method performed by a data transmission device is taken as an example, and the data transmission device provided in the embodiment of the present application is described.

Fig. 3 is a structural diagram of a data transmission apparatus according to an embodiment of the present application, and as shown in fig. 3, a data transmission apparatus 300 is applied to a network side device, where the data transmission apparatus 300 includes:

a first sending module 301, configured to send a first message, where the first message is used to indicate that a transmission path of a target service is changed from a first transmission path to a second transmission path;

a receiving module 302, configured to receive a second message sent by a terminal, where the second message is used to indicate a receiving state of the target service in the first transmission path by the terminal;

a second sending module 303, configured to send the first data of the target service on the second transmission path according to the second message.

Optionally, the first data of the target service includes:

and the terminal loses the data packet on the first transmission path.

Optionally, the data transmission apparatus 300 further includes:

a third sending module, configured to send a third message, where the third message is used to indicate data packet number information corresponding to the first data of the target service in the first transmission path.

Optionally, the first transmission path and the second transmission path are transmission paths of different radio bearers, respectively; alternatively, the first and second electrodes may be,

the first transmission path and the second transmission path are different transmission paths of the same radio bearer.

Optionally, the first transmission path is a transmission path of a unicast transmission mode, and the second transmission path is a transmission path of a multicast transmission mode; alternatively, the first and second electrodes may be,

the first transmission path is a transmission path of a multicast transmission mode, and the second transmission path is a transmission path of a unicast transmission mode.

Optionally, the first message further includes indication information of the target service, where the indication information includes at least one of a session identifier, a data stream identifier, and a multicast service identifier.

Optionally, the second message is transmitted through at least one transmission path of the first transmission path and the second transmission path.

Optionally, the second message further includes indication information of the first transmission path.

Optionally, the indication information of the first transmission path includes at least one of a radio bearer identifier, a data stream identifier, a session identifier, a logical channel identifier, a cell group identifier, and a multicast service identifier.

Fig. 4 is a flowchart of a data transmission method provided in an embodiment of the present application, and as shown in fig. 4, the data transmission method is applied to a first terminal, and the method includes the following steps:

step 401: receiving a first message sent by a network side device, wherein the first message is used for indicating that a transmission path of a target service is changed from a first transmission path to a second transmission path;

step 402: and sending a second message to the network side equipment, wherein the second message is used for indicating the receiving state of the first terminal to the target service in the first transmission path.

In the embodiment of the present application, the first terminal may be understood as the terminal 11 in fig. 1.

In the embodiment of the application, when the transmission path of the data is changed, the terminal reports the data receiving state of the source receiving path to the network side device, so that the network side device can retransmit the data according to the data receiving state of the terminal, and thus, the repeated transmission of the data can be effectively avoided.

Optionally, the second message includes data packet number information of the target service, where the data packet number information of the target service is used to indicate a receiving state of the target service in the first transmission path by the first terminal.

the number information of the first lost data packet of the first terminal on the first transmission path;

the number information of a data packet before a first lost data packet of the first transmission path of the first terminal;

the number information of a data packet subsequent to a first lost data packet of the first transmission path of the first terminal;

the number information of the data packet lost by the first terminal on the first transmission path;

and the number information of the data packet received by the first terminal on the first transmission path.

Optionally, the method further includes:

and adjusting the variable of the data receiving window of the second transmission path according to the second message.

In this embodiment, the variable of the data reception window comprises at least one of an upper boundary and a lower boundary of the data reception window. The first terminal determines whether to receive the data packet according to a variable of the data receiving window, for example, a lower boundary of the data receiving window, so that the first terminal adjusts the variable of the data receiving window of the second transmission path according to the second message, the first terminal can successfully receive data of the target service sent by the network side device on the second transmission path, and the loss of the data packet is avoided.

Optionally, the adjusting, according to the second message, a variable of a data reception window of the second transmission path includes:

adjusting the number of the last data packet submitted to the upper protocol entity by the second transmission path to be a first number, wherein the first number is the number of the previous data packet of the first lost data packet or the number of the last data packet submitted to the upper protocol entity by the first terminal on the first transmission path; alternatively, the first and second electrodes may be,

and adjusting the number of the current first to-be-received data packet of the second transmission path to be a second number, wherein the second number is the number of the first lost data packet of the first terminal on the first transmission path.

In this embodiment, the first terminal may adjust the variable of the data receiving window of the second transmission path according to the number information of the first lost packet of the first transmission path, or may adjust the variable of the data receiving window of the second transmission path according to the number information of the last packet delivered to the upper layer protocol entity of the first transmission path.

Through the adjustment, the number of the data packet retransmitted by the network side equipment on the second transmission path can be located in the range of the data receiving window, so that the first terminal can be ensured to successfully receive the data packet retransmitted by the network side equipment on the second transmission path, and the loss of the data packet is avoided.

Optionally, the method further includes:

and receiving the first data of the target service sent by the network side equipment on the second transmission path.

Optionally, the first data of the target service includes any one of:

a first missing data packet of the first transmission path and a data packet following the first missing data packet by the first terminal;

data packets lost by the first terminal on the first transmission path;

n terminals, including the first terminal, an earliest data packet among first lost data packets of the first transmission path and data packets subsequent to the earliest data packet;

Optionally, the method further includes:

and receiving a third message sent by the network side device, where the third message is used to indicate data packet number information corresponding to the first data of the target service in the first transmission path.

In this embodiment, by receiving the third message sent by the network side device, the first terminal can know the number information corresponding to the data packet retransmitted by the network side device on the first transmission path through the third message, so that when the first terminal receives the data packet retransmitted by the network side device on the second transmission path, the first terminal can determine whether to receive or discard the data packet according to the number information corresponding to the first transmission path.

Optionally, the method further includes:

and discarding the data packet meeting the preset condition in the first data of the target service.

In this embodiment, after receiving the first data of the target service sent by the network side device, the first terminal may discard the data packet that meets the preset condition. Specifically, the first terminal may determine, according to the data packet number information corresponding to the first data of the target service indicated by the third message in the first transmission path, a data packet that meets the preset condition from the first data of the target service.

Optionally, the data packet meeting the preset condition includes any one of the following items:

the data packet is delivered to an upper layer protocol entity in the first transmission path;

the data packet is a data packet which is neglected to be received in the first transmission path.

The higher layer Protocol entity may include, from top to bottom, an SDAP (Service Data Adaptation Protocol), a PDCP (Packet Data Convergence Protocol), an RLC (Radio Link Control), and an MAC (Media Access Control) in sequence.

Since the network side device may retransmit the data packet that the first terminal has received on the first transmission path through the second transmission path, for the portion of data packet, if the first terminal has delivered to the higher-layer protocol entity on the first transmission path, the first terminal may discard the portion of data packet without being delivered to the higher-layer protocol entity again. In addition, for the data packet that the first terminal has ignored on the first transmission path, even if the network side device performs retransmission through the second transmission path, the first terminal may discard the data packet.

In this embodiment, by discarding the data packet that satisfies the preset condition, the first terminal can save the resource transmission overhead, and the communication performance of the first terminal is improved.

Optionally, the method further includes:

processing the first data of the target service after processing the second data of the target service; and the second data of the target service is the data received by the first terminal on the first transmission path.

In this embodiment, the first terminal processes the data received on the first transmission path first, and then processes the data received on the second transmission path, so that when the transmission path of the target service is changed, the first terminal can be ensured to process the data of the target service in sequence according to the data receiving sequence of the target service, thereby reducing data loss and avoiding interruption of received data.

Optionally, the processing the second data of the target service includes:

and processing the second data of the target service and delivering the second data to a high-layer protocol entity.

Optionally, the processing and submitting the second data of the target service to a higher layer protocol entity includes any one of the following:

reconstructing the RLC entity of the first transmission path;

processing the second data of the target service through an RLC entity, and delivering the processed second data of the target service to a high-layer protocol entity;

reconstructing the PDCP entity of the first transmission path;

and processing the second data of the target service through the PDCP entity, and delivering the processed second data of the target service to a high-layer protocol entity.

In this embodiment, the first terminal may reconstruct the RLC entity of the first transmission path, or may not reconstruct the RLC entity of the first transmission path, but process the buffered second data of the target service and deliver the complete RLC SDU data to the upper protocol entity. The first terminal may also reconstruct the PDCP entity of the first transmission path, or may not reconstruct the PDCP entity of the first transmission path, but process the buffered second data of the target service and deliver the processed second data to the upper layer protocol entity.

Optionally, the processing and delivering the second data of the target service to a higher layer protocol entity includes at least one of the following:

ignoring data which is not received by the first terminal on the first transmission path;

processing the data cached by the first terminal and submitting the data to a high-level protocol entity;

discarding data packets of the first terminal following a first lost data packet of the first transmission path;

and processing and delivering the data packet before the first lost data packet to a high-layer protocol entity.

In this embodiment, the first terminal may ignore the data that the first terminal does not receive in the first transmission path, and process and deliver the data cached by the first terminal to the upper layer protocol entity. For example, the PDCP receiving entity of the first terminal receives the PDCP PDU-1/3 on the first transmission path, but does not receive the PDCP PDU-2, the PDCP receiving entity may ignore the PDCP PDU-2, process the PDCP PDU-1/3, e.g., decrypt or decompress the PDCP PDU-1/3 or remove the header of the PDCP PDU, and deliver it to the higher protocol entity of the PDCP receiving entity.

In this embodiment, the first terminal may process and deliver to the higher layer protocol entity a data packet preceding the first lost data packet of the first transmission path, and start with the first lost data packet, and discard all data packets following the data packet. For example, the PDCP receiving entity of the first terminal receives the PDCP PDU-1/3/5 on the first transmission path, where the PDCP PDU-2 is the first lost packet, and the PDCP receiving entity processes the PDCP PDU-1, for example, decrypts or decompresses the PDCP PDU-1 or removes the header of the PDCP PDU, and then delivers it to the higher protocol entity of the PDCP receiving entity, and discards the PDCP PDU-3/5.

It should be noted that, the relevant implementation manner and the relevant description in the method embodiment of fig. 2 may be applied to the embodiment of the present application, and achieve the same technical effect, and are not described herein again to avoid repetition.

In the data transmission method provided by the embodiment of the present application, the execution main body may be a data transmission device, or a control module in the data transmission device for executing the data transmission method. In the embodiment of the present application, a data transmission method performed by a data transmission device is taken as an example, and the data transmission device provided in the embodiment of the present application is described.

Fig. 5 is a structural diagram of a data transmission apparatus according to an embodiment of the present application, and as shown in fig. 5, a data transmission apparatus 500 is applied to a first terminal, where the data transmission apparatus 500 includes:

a first receiving module 501, configured to receive a first message sent by a network side device, where the first message is used to indicate that a transmission path of a target service is changed from a first transmission path to a second transmission path;

a sending module 502, configured to send a second message to the network side device, where the second message is used to indicate a receiving state of the target service at the first transmission path by the first terminal.

Optionally, the data transmission apparatus 500 further includes:

a second receiving module, configured to receive, at the second transmission path, the first data of the target service sent by the network side device.

Optionally, the first data of the target service includes any one of:

data packets lost by the first terminal on the first transmission path;

Optionally, the data transmission apparatus 500 further includes:

a third receiving module, configured to receive a third message sent by the network side device, where the third message is used to indicate data packet number information corresponding to the first data of the target service in the first transmission path.

Optionally, the data transmission apparatus 500 further includes:

and the discarding module is used for discarding the data packet meeting the preset condition in the first data of the target service.

Optionally, the data transmission apparatus 500 further includes:

the processing module is used for processing the first data of the target service after processing the second data of the target service; and the second data of the target service is the data received by the first terminal on the first transmission path.

Optionally, the processing module is specifically configured to:

Optionally, the processing module is specifically configured to any one of:

reestablishing a Radio Link Control (RLC) entity of the first transmission path;

reconstructing a Packet Data Convergence Protocol (PDCP) entity of the first transmission path;

Optionally, the processing module is specifically configured to at least one of:

Optionally, the data transmission apparatus 500 further includes:

and the adjusting module is used for adjusting the variable of the data receiving window of the second transmission path according to the second message.

Optionally, the adjusting module is specifically configured to:

The data transmission device in the embodiment of the present application may be a device, or may be a component, an integrated circuit, or a chip in a terminal. The device can be a mobile terminal or a non-mobile terminal. By way of example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The data transmission device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system (Android), an iOS operating system, or other possible operating systems, which is not specifically limited in the embodiments of the present application.

The data transmission device provided in the embodiment of the present application can implement each process implemented by the method embodiment of fig. 4, and achieve the same technical effect, and for avoiding repetition, details are not repeated here.

Optionally, as shown in fig. 6, an embodiment of the present application further provides a communication device 600, which includes a processor 601, a memory 602, and a program or an instruction stored on the memory 602 and executable on the processor 601, for example, when the communication device 600 is a terminal, the program or the instruction is executed by the processor 601 to implement the processes of the data transmission method embodiment, and the same technical effect can be achieved. When the communication device 600 is a network-side device, the program or the instructions are executed by the processor 601 to implement the processes of the data transmission method embodiments, and the same technical effect can be achieved.

The embodiment of the application also provides network side equipment. As shown in fig. 7, the network-side device 700 includes: an antenna 71, a radio frequency device 72, a baseband device 73. The antenna 71 is connected to a radio frequency device 72. In the uplink direction, the rf device 72 receives information via the antenna 71 and sends the received information to the baseband device 73 for processing. In the downlink direction, the baseband device 73 processes information to be transmitted and transmits the information to the rf device 72, and the rf device 72 processes the received information and transmits the processed information through the antenna 71.

The above-mentioned band processing means may be located in the baseband device 73, and the method performed by the network side device in the above embodiment may be implemented in the baseband device 73, where the baseband device 73 includes a processor 74 and a memory 75.

The baseband device 73 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 7, wherein one of the chips, for example, the processor 74, is connected to the memory 75 to call up the program in the memory 75 to perform the network device operation shown in the above method embodiment.

The baseband device 73 may further include a network interface 76, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 72.

Specifically, the network side device of the embodiment of the present invention further includes: the instructions or programs stored in the memory 75 and capable of being executed on the processor 74, and the processor 74 calls the instructions or programs in the memory 75 to execute the method executed by each module shown in fig. 3, and achieve the same technical effect, and are not described herein in detail to avoid repetition.

Fig. 8 is a schematic hardware structure diagram of a first terminal for implementing an embodiment of the present application.

The first terminal 1000 includes, but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, and a processor 1010.

Those skilled in the art will appreciate that the first terminal 1000 can further comprise a power supply (e.g., a battery) for supplying power to various components, and the power supply can be logically connected to the processor 1010 through a power management system, so as to implement functions of managing charging, discharging, and power consumption through the power management system. The terminal structure shown in fig. 8 does not constitute a limitation of the first terminal, which may include more or less components than those shown, or combine some components, or a different arrangement of components, and will not be described again here.

It should be understood that in the embodiment of the present application, the input Unit 1004 may include a Graphics Processing Unit (GPU) 10041 and a microphone 10042, and the Graphics Processing Unit 10041 processes image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071 is also referred to as a touch screen. The touch panel 10071 may include two parts, a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In this embodiment of the application, the radio frequency unit 1001 receives downlink data from a network side device and then processes the downlink data to the processor 1010; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 1001 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 1009 may be used to store software programs or instructions and various data. The memory 1009 may mainly include a program or instruction storage area and a data storage area, wherein the program or instruction storage area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, and the like) required for at least one function, and the like. Further, the Memory 1009 may include a high-speed random access Memory and may also include a nonvolatile Memory, where the nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable PROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.

Processor 1010 may include one or more processing units; alternatively, processor 1010 may integrate an application processor that handles primarily the operating system, user interface, and application programs or instructions, and a modem processor that handles primarily wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 1010.

Wherein, the radio frequency unit 1001 is configured to:

Optionally, the radio frequency unit 1001 is further configured to:

Optionally, the first data of the target service includes any one of:

data packets lost by the first terminal on the first transmission path;

Optionally, the radio frequency unit 1001 is further configured to:

Optionally, the processor 1010 is configured to:

Optionally, the processor 1010 or the radio frequency unit 1001 is further configured to:

Optionally, the processor 1010 or the radio frequency unit 1001 is further configured to at least one of:

Optionally, the processor 1010 is further configured to:

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the data transmission method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The processor is the processor in the first terminal or the network side device in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to run a program or an instruction to implement each process of the data transmission method embodiment, and can achieve the same technical effect, and the details are not repeated here to avoid repetition.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A data transmission method is applied to network side equipment, and is characterized in that the method comprises the following steps:

2. The method of claim 1, wherein the first data of the target service comprises:

and the terminal loses the data packet on the first transmission path.

3. The method according to claim 2, wherein if the network-side device receives the second messages sent by N terminals, and first lost packets of the N terminals on the first transmission path are different, where N is an integer greater than 1, the first data of the target service includes:

4. The method of claim 1, further comprising:

5. The method according to any one of claims 1 to 4, wherein the second message includes packet number information of the target service, and the packet number information of the target service is used to indicate a receiving status of the target service at the first transmission path by the terminal.

6. The method according to claim 5, wherein the packet number information of the target service comprises any one of the following items:

7. The method of claim 1, wherein the first transmission path and the second transmission path are transmission paths of different radio bearers, respectively; alternatively, the first and second electrodes may be,

8. The method according to claim 1, wherein the first transmission path is a transmission path of a unicast transmission scheme, and the second transmission path is a transmission path of a multicast transmission scheme; alternatively, the first and second electrodes may be,

9. The method of claim 1, wherein the second message is transmitted via at least one of the first transmission path and the second transmission path.

10. A data transmission device is applied to network side equipment, and is characterized by comprising:

11. The apparatus of claim 10, wherein the first data of the target service comprises:

and the terminal loses the data packet on the first transmission path.

12. The method according to claim 11, wherein if the network-side device receives the second messages sent by N terminals, and first lost packets of the N terminals on the first transmission path are different, where N is an integer greater than 1, the first data of the target service includes:

13. The apparatus of claim 10, further comprising:

14. A data transmission method is applied to a first terminal, and is characterized by comprising the following steps:

15. The method of claim 14, further comprising:

16. The method of claim 15, wherein the first data of the target service comprises any one of:

data packets lost by the first terminal on the first transmission path;

17. The method of claim 15, further comprising:

18. The method according to claim 17, wherein the data packet satisfying the preset condition comprises any one of the following:

19. The method of claim 15, further comprising:

20. The method of claim 19, the processing the second data of the target service, comprising:

21. The method of claim 20, wherein the processing and delivering the second data of the target service to a higher layer protocol entity comprises any one of:

22. The method of claim 20, wherein processing and delivering the second data of the target service to a higher layer protocol entity comprises at least one of:

23. The method of claim 14, further comprising:

24. The method of claim 23, wherein the adjusting the variable of the data reception window of the second transmission path according to the second message comprises:

25. The method according to any of claims 14 to 16, wherein the second message comprises packet number information of the target service, and the packet number information of the target service is used to indicate a receiving status of the target service at the first transmission path by the first terminal.

26. The method according to claim 25, wherein the packet number information of the target service comprises any one of the following:

27. The method of claim 14, wherein the first transmission path and the second transmission path are transmission paths of different radio bearers, respectively; alternatively, the first and second electrodes may be,

28. The method according to claim 14, wherein the first transmission path is a transmission path of a unicast transmission scheme, and the second transmission path is a transmission path of a multicast transmission scheme; alternatively, the first and second electrodes may be,

29. A data transmission apparatus, applied to a first terminal, comprising:

30. The apparatus of claim 29, further comprising:

31. The apparatus of claim 30, further comprising:

32. The apparatus according to claim 31, wherein the data packet satisfying the preset condition comprises any one of:

33. The apparatus of claim 29, further comprising:

34. The apparatus of claim 33, wherein the adjustment module is specifically configured to:

35. A network-side device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the data transmission method according to any one of claims 1 to 9.

36. A first terminal comprising a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the data transmission method according to any one of claims 14 to 28.

37. A readable storage medium, characterized in that a program or instructions are stored thereon, which program or instructions, when executed by the processor, carry out the steps of the data transmission method according to any one of claims 1 to 9, or carry out the steps of the data transmission method according to any one of claims 14 to 28.