WO2023143431A1

WO2023143431A1 - Communication method and communication apparatus

Info

Publication number: WO2023143431A1
Application number: PCT/CN2023/073302
Authority: WO
Inventors: 黄曲芳
Original assignee: 展讯通信（上海）有限公司
Priority date: 2022-01-28
Filing date: 2023-01-20
Publication date: 2023-08-03
Also published as: CN116566553A

Abstract

Disclosed in the present application are a communication method and a communication apparatus. The method comprises: a terminal device determining that data packets which are not correctly received comprise at least one important data packet; and the terminal device sending a data packet re-transmission indication to a network device. By means of implementing the embodiments of the present application, only when a terminal device determines that an important data packet is not correctly received, data packet re-transmission is triggered, such that the communication complexity can be reduced on the basis of ensuring the block error rate of the important data packet, and the applicability is high.

Description

Communication method and communication device

technical field

The present application relates to the technical field of communication, and in particular, to a communication method and a communication device.

Background technique

Currently, extended reality (XR) services are mainly video services. Generally speaking, XR terminals receive data packets from the XR server through network devices, and decode the data packets to present corresponding images to users. . Typically, a video frame contains multiple packets, each of varying importance. Some data packets are more important, once lost, it will seriously affect the image presentation, and some data packets are not important, if lost, it will only have a slight impact on the image presentation. However, currently only the video encoding module of the XR server and the video decoding module of the XR terminal can know the importance of each data packet, and the network equipment does not know the importance of the data packet. Therefore, in order to improve the importance of important data packets during transmission For the block error rate, it is proposed in related technologies that the importance level indication of each data packet can be sent to the network device through the XR server, and the network device will distinguish and process each data packet according to the importance level indication, that is, the data with high importance Packets, use a highly robust transmission method, and use a low-robust transmission method for low-importance data packets, but this method of providing an indication of the importance of each data packet by the XR server does not affect the original data packet transmission The process has been greatly changed, which increases the complexity of communication. Especially when a network device is connected to multiple XR servers, each XR server needs to provide the indication information of the importance of the data packet, and the indication must be general and can It is understood and executed by network devices.

Contents of the invention

Embodiments of the present application provide a communication method and a communication device, which can reduce communication complexity and have high applicability on the basis of ensuring the block error rate of important data packets.

In the first aspect, the embodiment of the present application provides a communication method, the method includes:

The terminal device determines that at least one important data packet is included in the incorrectly received data packet;

The terminal device sends a data packet retransmission indication to the network device.

Based on the method described in the first aspect, when the terminal device determines that the important data packet has not been received correctly, it will trigger the retransmission of the data packet, which can reduce the communication complexity and improve the applicability on the basis of ensuring the block error rate of the important data packet. high.

Optionally, in combination with the first aspect, the data packet retransmission indication is used to indicate the retransmission of M data packets, or the data packet retransmission indication is used to indicate at least For the retransmission of one bit information, the M is a positive integer.

Optionally, in combination with the first aspect, the method further includes:

The terminal device receives the data packet of the i-th service frame, and the i is a positive integer greater than or equal to 1;

The terminal device determines that at least one important data packet is included in the incorrectly received data packet, including:

The terminal device determines the at least one important data packet included in the incorrectly received data packets in the i-th service frame according to the received data packets of the i-th service frame.

Optionally, in combination with the first aspect, the terminal device determines, according to receiving the data packet of the ith service frame, the at least one Important data packages, including:

The application layer of the terminal device determines the at least one important data packet included in the incorrectly received data packet in the i-th service frame according to the received data packet of the i-th service frame.

Optionally, in combination with the first aspect, the terminal device sends a data packet retransmission indication to the network device, including:

The application layer of the terminal device sends an upper layer indication to the access layer of the terminal device, where the upper layer indication is used to instruct data packet retransmission;

The access layer of the terminal device sends a data packet retransmission indication to the network device.

Optionally, in combination with the first aspect, the method further includes:

After the access layer of the terminal device sends the data packet of the i-th service frame to the application layer of the terminal device, start a timer;

If the timer expires and the upper layer instruction is not received yet, the access layer of the terminal device clears the receiving buffer and resets the receiving variable.

Optionally, in combination with the first aspect, the upper layer indication is used to indicate the retransmission of the data packet, including:

The upper layer indication is used to indicate the first data packet, and the first data packet is a data packet correctly received after the second data packet of the i-th service frame, or the first data packet is the i-th service frame A data packet that is correctly received before the second data packet of the frame, and the second data packet is a data packet that is not correctly received in the ith service frame.

The upper layer indication is used to indicate the first data packet, wherein the first data packet is the last N data packets of the ith service frame, and the incorrectly received data packet is the last N data packet of the ith service frame. The last N data packets, where N is a positive integer greater than or equal to 1.

Optionally, in combination with the first aspect, the upper layer indication is used to indicate data packet retransmission, including:

The upper layer indication is used to indicate the SN of at least one data packet that needs to be retransmitted.

Optionally, in combination with the first aspect, the SN of the at least one data packet that needs to be retransmitted is the PDCP SN of the at least one data packet that needs to be retransmitted, or the RLC of the at least one data packet that needs to be retransmitted Sn.

Optionally, with reference to the first aspect, the access layer is a packet data convergence protocol PDCP layer, a radio link control RLC layer or a media access control MAC layer.

In the second aspect, the embodiment of the present application provides a communication device, the device is a terminal device, and the device includes:

A determining unit, configured to determine that at least one important data packet is included in the incorrectly received data packets;

The transceiver unit is configured to send a data packet retransmission instruction to the network device.

Optionally, in combination with the second aspect, the data packet retransmission indication is used to indicate the retransmission of M data packets, or the data packet retransmission indication is used to indicate at least For the retransmission of one bit information, the M is a positive integer.

Optionally, in combination with the second aspect, the transceiver unit is also used for:

Receive the data packet of the i-th business frame, where i is a positive integer greater than or equal to 1;

The determining unit is specifically used for:

Determine the at least one important data packet included in the incorrectly received data packets in the i-th service frame according to the received data packets of the i-th service frame.

Optionally, in combination with the second aspect, the determining unit is specifically configured to:

The application layer of the terminal device determines the i-th service frame according to the received data packet of the i-th service frame The at least one important data packet included in the incorrectly received data packet in the service frame.

Optionally, in combination with the second aspect, the transceiver unit is specifically configured to:

Sending an upper layer indication to the access layer of the terminal device through the application layer of the terminal device, where the upper layer indication is used to instruct data packet retransmission;

Sending a data packet retransmission indication to the network device through the access layer of the terminal device.

Optionally, in combination with the second aspect, the device further includes:

A timing unit, configured to start a timer after the access layer of the terminal device sends the data packet of the i-th service frame to the application layer of the terminal device;

The release unit is configured to clear the receiving buffer in the access layer of the terminal device and reset the receiving variable if the timer expires and the upper layer instruction has not been received.

Optionally, in combination with the second aspect, the upper layer indication is used to indicate the retransmission of the data packet, including:

Optionally, in combination with the second aspect, the upper layer indication is used to indicate data packet retransmission, including:

Optionally, in combination with the second aspect, the SN of the at least one data packet that needs to be retransmitted is the PDCP SN of the at least one data packet that needs to be retransmitted, or the RLC of the at least one data packet that needs to be retransmitted Sn.

Optionally, with reference to the second aspect, the access layer is a packet data convergence protocol PDCP layer, a radio link control RLC layer or a media access control MAC layer.

In a third aspect, a chip is provided, including a processor and a communication interface, and the processor is configured to make the chip execute the method according to any one of the first aspect above.

In a fourth aspect, a module device is provided, wherein the module device includes a communication module, a power module, a storage module and a chip, wherein: the power module is used to provide electric energy for the module device; the storage module It is used for storing data and instructions; the communication module is used for internal communication of the module device, or for communication between the module device and external devices; the chip is used for executing the method according to any one of the above-mentioned first aspects.

In a fifth aspect, a communication device is provided, including a memory and a processor, the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions, so that the communication device performs any of the above-mentioned first aspects. one method.

According to a sixth aspect, a computer-readable storage medium is provided. Computer-readable instructions are stored in the computer-readable medium. When the computer-readable instructions are run on the communication device, the communication device is made to execute the method of any one of the above-mentioned first aspects.

In a seventh aspect, the present application provides a computer program or a computer program product, including codes or instructions. When the codes or instructions are run on a computer, the computer is made to execute the method according to any one of the first aspect.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of downlink data transmission between layers between a terminal device and a base station;

Fig. 3 is a schematic flow chart of data packet transmission;

FIG. 4 is a schematic flowchart of a communication method provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of a scene where the PDCP layer of the terminal device triggers retransmission according to an embodiment of the present application;

FIG. 6a is a schematic diagram of another scenario where the PDCP layer of the terminal device triggers retransmission according to an embodiment of the present application;

FIG. 6b is a schematic diagram of another scenario where the PDCP layer of the terminal device triggers retransmission according to an embodiment of the present application;

FIG. 7 is a schematic diagram of another scenario where the PDCP layer of the terminal device triggers retransmission according to an embodiment of the present application;

Fig. 8a is a schematic diagram of a scenario of data packet reception provided by the embodiment of the present application;

FIG. 8b is a schematic diagram of another scenario of data packet reception provided by the embodiment of the present application;

FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of the present application;

Fig. 11 is a schematic structural diagram of a module device provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also Plural expressions are included unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used in this application refers to and includes any and all possible combinations of one or more of the listed items.

It should be noted that the terms “first”, “second”, and “third” in the specification and claims of the present application and in the above drawings are used to distinguish similar objects, but not necessarily to describe specific objects. sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the term "comprising" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or server comprising a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, Instead, other steps or elements not explicitly listed or inherent to the process, method, product or apparatus may be included.

In order to better understand the embodiment of the present application, the following first introduces the system architecture involved in the embodiment of the present application:

The technical solution of the embodiment of the present application can be applied to various communication systems, for example: global mobile communication (global system of mobile communication (GSM) system, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (general packet radio service, GPRS) , long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunications system, UMTS) , worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5th generation, 5G) system or new radio (new radio, NR) and future communication systems, etc.

Fig. 1 is a schematic diagram of a communication system provided by an embodiment of the present application, and the solution in the present application is applicable to the communication system. The communication system may include at least one network device and at least one terminal device. FIG. 1 takes a communication system including one network device and one terminal device as an example. in:

Terminal equipment includes equipment that provides voice and/or data connectivity to users. For example, terminal equipment is a device with wireless transceiver capabilities that can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed in On the water (such as ships, etc.); can also be deployed in the air (such as aircraft, balloons and satellites, etc.). The terminal can be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, or a wireless terminal in industrial control (industrial control) , vehicle terminal equipment, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety, Wireless terminals in smart cities, wireless terminals in smart homes, wearable terminal devices, etc. The embodiments of the present application do not limit the application scenarios. A terminal may sometimes be referred to as terminal equipment, user equipment (UE), access terminal equipment, vehicle-mounted terminal, industrial control terminal, UE unit, UE station, mobile station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, terminal equipment, wireless communication equipment, UE proxy or UE device, etc. Terminals can also be fixed or mobile. In the embodiment of the present application, the device used to realize the function of the terminal device may be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system or a combined device or component that can realize the function of the terminal device. Can be installed in terminal equipment.

The network equipment can be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a transmission reception point (transmission reception point, TRP), and a next-generation base station (next station) in the fifth generation (5th generation, 5G) mobile communication system generation NodeB, gNB), a next-generation base station in a sixth generation (6th generation, 6G) mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. The network device may also be a module or unit that completes some functions of the base station, for example, it may be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU). The CU here completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and can also complete the function of the service data adaptation protocol (SDAP); the DU completes the functions of the base station The functions of the radio link control layer and the medium access control (medium access control, MAC) layer can also complete the functions of part or all of the physical layer. For specific descriptions of the above protocol layers, reference may be made to relevant technical specifications of the 3rd generation partnership project (3rd generation partnership project, 3GPP). The network equipment may be a macro base station, a micro base station or an indoor station, or a relay node or a donor node. In the embodiment of the present application, the device used to realize the function of the network device may be the network device itself, or a device capable of supporting the network device to realize the function, such as a chip system or a combined device or component that can realize the function of the base station. The device may installed in network equipment. of this application The embodiment does not limit the specific technology and specific device form adopted by the network device.

Understandably, the communication between the base station and the terminal device follows a certain protocol layer structure, for example, the control plane protocol layer structure may include a radio resource control (radio resource control, RRC) layer, a packet data convergence layer protocol (packet data convergence protocol, PDCP) layer, radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer and physical layer; the user plane protocol layer structure can include PDCP layer, RLC layer, MAC layer and physical layer In a possible implementation, the PDCP layer may also include a service data adaptation protocol (service data adaptation protocol, SDAP) layer and the like.

Taking the data transmission between the base station and the terminal equipment as an example, the data transmission needs to go through the user plane protocol layer, such as the SDAP layer, PDCP layer, RLC layer, MAC layer, and physical layer. Among them, the SDAP layer, PDCP layer, RLC layer, The MAC layer and the physical layer may also be collectively referred to as the access layer. Exemplarily, at least one data radio bearer (data radio bearer, DRB) is established between the base station and the terminal device to transmit data, and each DRB may correspond to a set of functional entities, such as including a PDCP layer entity, and the PDCP layer entity The corresponding at least one RLC layer entity, the at least one MAC layer entity corresponding to the at least one RLC layer entity, and the at least one physical layer entity corresponding to the at least one MAC layer entity.

Taking downlink data transmission as an example, FIG. 2 is a schematic diagram of downlink data transmission between layers between a terminal device and a base station. The downward arrow in Figure 2 indicates data transmission, and the upward arrow indicates data reception. After the SDAP layer entity obtains the data from the upper layer, it can map the data to the PDCP layer entity of the corresponding DRB according to the QoS flow indicator (QFI) of the data, and the PDCP layer entity can transmit the data to at least one corresponding to the PDCP layer entity. An RLC layer entity is further transmitted by at least one RLC layer entity to the corresponding MAC layer entity, and then the MAC layer entity generates a transmission block, and then performs wireless transmission through the corresponding physical layer entity. The data is encapsulated correspondingly in each layer. The data received by a certain layer from the upper layer of the layer is regarded as the service data unit (service data unit, SDU) of the layer, which becomes a protocol data unit (protocol data unit) after layer encapsulation. unit, PDU), and then passed to the next layer. For example, the data received by the PDCP layer entity from the upper layer is called PDCP SDU, and the data sent by the PDCP layer entity to the lower layer is called PDCP PDU; the data received by the RLC layer entity from the upper layer is called RLC SDU, and the data sent by the RLC layer entity to the lower layer It is called RLC PDU. Among them, data can be transmitted between different layers through corresponding channels, for example, data can be transmitted between RLC layer entities and MAC layer entities through a logical channel (logical channel, LCH), and between MAC layer entities and physical layer entities can be transmitted through Transport channel (transport channel) to transmit data.

Exemplarily, according to FIG. 2, it can also be seen that the terminal device also has an application layer and a non-access layer; wherein, the application layer can be used to provide services to applications installed in the terminal device, for example, the received Downlink data can be sequentially transmitted from the physical layer to the application layer, and then provided to the application program by the application layer; for another example, the application layer can obtain the data generated by the application program, and transmit the data to the physical layer in sequence, and send it to other communication devices. The non-access layer can be used to forward user data, such as forwarding uplink data received from the application layer to the SDAP layer or forwarding downlink data received from the SDAP layer to the application layer.

It should be noted that currently, XR services are mainly video services. Generally speaking, XR terminals receive data packets from XR servers through network devices, and decode the data packets to present corresponding images to users. Typically, a video frame contains multiple packets, each of varying importance. Some data packets are more important. Once lost, it will seriously affect the display of the screen. Some data packets are not important. If lost, it will only affect the display of the screen. have a slight effect. However, currently only the video encoding module of the XR server and the video decoding module of the XR terminal can know the importance of each data packet, and the network equipment does not know the importance of the data packet. Therefore, as shown in Figure 3, in order to improve the transmission The block error rate of important data packets in the process, the related technology proposes that the importance level indication of each data packet can be sent to the network device through the XR server, and the network device will distinguish and process each data packet according to the importance level indication, namely For data packets with high importance, use a transmission method with high robustness, and for data packets with low importance, use a transmission method with low robustness. However, this method of providing an indication of the importance of each data packet by the XR server greatly changes the original data packet transmission process and increases the complexity of communication, especially when a network device is connected to multiple XR servers. Each XR server provides an indication of the importance of the data packet, and the indication must be general and can be understood and executed by network devices.

Based on this, the embodiment of the present application provides a communication method, which can reduce communication complexity on the basis of ensuring the block error rate of important data packets, and has high applicability.

The communication method, device, chip, and module device provided by the embodiments of the present application are further described in detail below.

Please refer to FIG. 4 . FIG. 4 is a schematic flowchart of a communication method provided by an embodiment of the present application. As shown in Figure 4, the communication method includes the following steps S401-S402:

S401. The terminal device determines that the incorrectly received data packets include at least one important data packet.

In some feasible implementation manners, for the data packets of the downlink XR service, the situation that the terminal device receives the data packets may include the following three types: 1. During the HARQ transmission process of the data packet in the MAC layer of the terminal device, the transmission does not Therefore, the MAC layer of the terminal device can buffer the transport blocks that have not been successfully decoded, and not submit them to the upper layer of the terminal device. 2. The data packet is segmented by the RLC layer entity of the network device during the transmission process. Therefore, when the RLC layer of the terminal device only receives a part of the data packet and does not receive all the segments, it will result in failure to report to the terminal device. Submit from above. 3. When the data packet fails the integrity verification at the PDCP layer of the terminal device, it will fail to be delivered to the upper layer of the terminal device. It is understandable that no matter which of the above three situations occurs, the data packet will not be successfully delivered to the upper layer of the terminal device. In this case, the terminal device can determine that it has not been received correctly according to the received data packet. The data packets include at least one important data packet, that is, the terminal device can determine whether the incorrectly received data packets include an important data packet and how many important data packets are included according to the received data packets. It should be noted that the "data packets incorrectly received by the terminal device" mentioned in the embodiment of the present application may include data packets not received by the terminal device at all, or only partially segmented data packets, or received wrong data packages, etc., are not limited here.

It can be understood that the data packets in the embodiment of the present application are transmitted in units of service frames, wherein one service frame includes multiple data packets, that is, the terminal device can receive the data packet of the i-th service frame, and i is greater than or A positive integer equal to 1. Wherein, the terminal device determines that at least one important data packet is included in the incorrectly received data packet, which can be understood as: the terminal device determines the incorrectly received data in the i-th business frame according to the received data packet of the i-th business frame At least one important data package included in the package. It is not difficult to understand that, for a video service, a service frame is a video frame, and one video frame includes multiple data packets. To facilitate understanding, the following embodiments of the present application mainly use a video frame as an example for schematic description.

It should be noted that since the video decoding module in the application layer of the terminal device uses a content delivery protocol to perform video decoding, during the video decoding process, the application layer of the terminal device can know the importance of the data packet , therefore, the terminal device determines the At least one important data packet included in the incorrectly received data packet can be further understood as: the application layer of the terminal device determines the incorrectly received At least one important data packet included in the data packet. Wherein, how the application layer of the terminal device learns the importance of incorrectly received data packets according to the received data packets can refer to the description in the protocol 26.998V090, which will not be repeated here.

Optionally, if the incorrectly received data packets do not include important data packets, the terminal device does not send a data packet retransmission indication to the network device, that is, when the application layer of the terminal device determines the i-th When the incorrectly received data packets in a business frame do not include important data packets, the application layer of the terminal device will not send an upper layer instruction to the access layer of the terminal device, so the access layer of the terminal device will not send data to the network device Packet retransmission indication. Or, when the application layer of the terminal device finds that all data packets of the i-th service frame have been received correctly based on the content distribution protocol, the terminal device does not send a data packet retransmission instruction to the network device. Or, when the application layer of the terminal device finds that there is an important data packet that has not been received in the i-th service frame based on the content distribution protocol, but the important data packet does not need to be retransmitted, the terminal device does not send data to the network device Packet retransmission indication. Here, "retransmission not required" can be interpreted as missing the retransmission opportunity, or unnecessary retransmission due to other reasons, and no limitation is imposed here.

S402. The terminal device sends a data packet retransmission instruction to the network device.

In some feasible implementation manners, when the application layer of the terminal device determines that the incorrectly received data packets include at least one important data packet, the terminal device may send a data packet retransmission indication to the network device. Specifically, the terminal device sending a data packet retransmission instruction to the network device can be understood as: the application layer of the terminal device sends an upper layer instruction to the access layer of the terminal device, and the upper layer instruction is used to instruct data packet retransmission; Send a data packet retransmission indication to the network device.

Wherein, the upper layer indication is used to instruct data packet retransmission may specifically include any of the following situations: ① The upper layer indication is only used to indicate retransmission, but does not specifically indicate a certain data packet. ②The upper layer indication is used to indicate the first data packet, the first data packet is the data packet received correctly after the second data packet of the i-th business frame, or the first data packet is the second data of the i-th business frame The data packet received correctly before the first packet, and the second data packet is the data packet not correctly received in the i-th business frame. That is to say, the upper layer indication is used to indicate the previous data packet of the data packet that needs to be retransmitted or the next data packet of the data packet that needs to be retransmitted. ③The upper layer indication is used to indicate the first data packet, wherein the first data packet is the last N data packets of the i-th business frame, and the incorrectly received data packet is the last N data packets of the i-th business frame, N is a positive integer greater than or equal to 1. ④The upper layer indication is used to indicate the sequence number (sequence number, SN) of at least one data packet that needs to be retransmitted. Wherein, the SN of at least one data packet that needs to be retransmitted may be the PDCP SN of at least one data packet that needs to be retransmitted, or the RLC SN of at least one data packet that needs to be retransmitted.

Optionally, in some feasible implementation manners, when the application layer of the terminal device determines based on the content distribution protocol that the i-th service frame includes important data packets that have not been received yet, for the decoding of the current i-th service frame , the important data packet does not need to be retransmitted, but for the following decoding of the i+1th, i+2th, ..., i+kth business frames, when the important data packet still needs to be retransmitted , then the terminal device can also send a packet retransmission instruction to the network device, that is, the application layer of the terminal device sends an upper layer instruction to the access layer of the terminal device, and the access layer of the terminal device sends a packet retransmission instruction to the network device. It should be noted that, in this scenario, the upper layer indication is not only used to indicate the retransmission of the data packet, but also indicates that the retransmission is not urgent. It only needs to complete the retransmission before the i+kth business frame, that is, the upper layer The indication can also be used to indicate the urgency of retransmission and the time of retransmission. Wherein, k is an integer greater than or equal to 1.

Wherein, the data packet retransmission indication can be used to indicate the retransmission of M data packets, or the data packet retransmission indication can be used to indicate the retransmission of at least one bit information of each data packet in the M data packets, and M is positive integer.

Wherein, the access layer of the terminal device is a PDCP layer, an RLC layer or a MAC layer. The schemes of retransmission triggered by the PDCP layer, RLC layer, and MAC layer of the terminal device are described in detail below:

1. The PDCP layer of the terminal device triggers retransmission

① When the PDCP layer of the terminal device receives the upper layer instruction sent by the application layer of the terminal device, and the upper layer instruction is only used to indicate retransmission, and does not specifically indicate a certain data packet, the PDCP layer of the terminal device can according to its own upward Which data packets have been submitted by the layer, determine which data packets have not been submitted to the upper layer, and then generate a PDCP status report as a data packet retransmission indication and send it to the network device (or described as the PDCP layer of the network device) to notify the network device. The PDCP layer performs packet retransmission.

For example, please refer to FIG. 5 . FIG. 5 is a schematic diagram of a scene where the PDCP layer of the terminal device triggers retransmission according to an embodiment of the present application. As shown in Figure 5, after the PDCP layer of the terminal device receives the upper layer indication sent by the application layer of the terminal device, if the PDCP layer of the terminal device finds that the PDCP SN of the data packet is 21, 22, 24, 26, 27...50 The data packet has been submitted to the upper layer, and the generated PDCP status report indicates that: 23, 25 have not been received, and the data packets after 51 and 51 have not been received. Among them, when the PDCP layer of the network device receives the PDCP status report, the PDCP layer of the network device retransmits data packets No. The device has sent, if it has been sent, retransmit these packets, if it has not been sent to the terminal device, it will not retransmit.

② When the PDCP layer of the terminal device receives the upper layer indication sent by the application layer of the terminal device, and the upper layer indication is used to indicate the previous data packet of the data packet that needs to be retransmitted or the next data packet of the data packet that needs to be retransmitted , the PDCP layer of the terminal device can determine the data packet that has not been submitted to the upper layer according to the instruction of the upper layer, that is, the data packet that needs to be retransmitted, and then generate a PDCP status report as a data packet retransmission instruction and send it to the network device (or described as the network device PDCP layer) to notify the PDCP layer of the network device to perform packet retransmission.

For example, please refer to FIG. 6a, which is a schematic diagram of another scenario where the PDCP layer of the terminal device triggers retransmission according to an embodiment of the present application. As shown in Figure 6a, assuming that the data packet indicated by the upper layer indication is the previous data packet of the data packet that needs to be retransmitted, and the data packet indicated by the upper layer indication is the data packet corresponding to PDCP SN equal to 22 and 24, then when the terminal After the PDCP layer of the device receives the upper layer indication sent by the application layer of the terminal device, the PDCP layer of the terminal device will indicate in the generated PDCP status report that the data packets with PDCP SN equal to 23 and 25 have not been received. Wherein, after the PDCP layer of the network device receives the PDCP status report, the PDCP layer of the network device retransmits the No. 23 data packet and the No. 25 data packet.

For another example, please refer to FIG. 6b. FIG. 6b is a schematic diagram of another scenario where the PDCP layer of the terminal device triggers retransmission according to an embodiment of the present application. As shown in Figure 6b, assuming that the data packet indicated by the upper layer indication is the last data packet of the data packet that needs to be retransmitted, and the data packet indicated by the upper layer indication is the data packet corresponding to PDCP SN equal to 24 and 26, then when the terminal After the PDCP layer of the device receives the upper layer indication sent by the application layer of the terminal device, the PDCP layer of the terminal device will indicate in the generated PDCP status report that the data packets with PDCP SN equal to 23 and 25 have not been received. Wherein, after the PDCP layer of the network device receives the PDCP status report, the PDCP layer of the network device retransmits the No. 23 data packet and the No. 25 data packet.

③ If the lost data packet is the last data packet or multiple data packets included in the i-th business frame data packets, the application layer of the terminal device can use an interlayer primitive to indicate "please retransmit the last N data packets of the i-th service frame". That is, the upper layer indication is used to indicate the first data packet, wherein the first data packet is the last N data packets of the i-th business frame, and the incorrectly received data packet is the last N data packets of the i-th business frame, N is a positive integer greater than or equal to 1. Therefore, the PDCP layer of the terminal device can determine the data packet that has not been submitted to the upper layer according to the instruction of the upper layer, that is, the data packet that needs to be retransmitted, and then generate a PDCP status report as a data packet retransmission instruction and send it to the network device (or described as a network device PDCP layer) to notify the PDCP layer of the network device to perform packet retransmission.

④ When the PDCP layer of the terminal device receives the upper layer indication sent by the application layer of the terminal device, and the upper layer indication is used to directly indicate the PDCP SN of the data packet that needs to be retransmitted, the PDCP layer of the terminal device can determine that there is no upward direction according to the upper layer indication. The data packet submitted by the layer, that is, the data packet that needs to be retransmitted, and then generates a PDCP status report as a data packet retransmission indication and sends it to the network device (or described as the PDCP layer of the network device) to notify the PDCP layer of the network device to execute the data. Packet retransmission.

For example, please refer to FIG. 7 . FIG. 7 is a schematic diagram of another scenario where the PDCP layer of the terminal device triggers retransmission according to an embodiment of the present application. As shown in Figure 7, assuming that the data packets indicated by the upper layer instructions are the data packets corresponding to the PDCP SN equal to 23 and the data packets corresponding to 25, then when the PDCP layer of the terminal device receives the upper layer instruction sent by the application layer of the terminal device , the PDCP layer of the terminal device will indicate in the generated PDCP status report that data packets No. 23 and No. 25 have not been received. Wherein, after the PDCP layer of the network device receives the PDCP status report, the PDCP layer of the network device retransmits the No. 23 data packet and the No. 25 data packet.

2. The RLC layer of the terminal device triggers retransmission

① When the RLC layer of the terminal device receives the upper-layer indication sent by the application layer of the terminal device, and the upper-layer indication is only used to indicate retransmission, and does not specifically indicate a certain data packet, the RLC layer of the terminal device can according to its own upward Which data packets have been submitted by the layer, determine which data packets have not been submitted to the upper layer, and then generate an RLC status report as a data packet retransmission indication and send it to the network device (or described as the RLC layer of the network device) to notify the network device. The RLC layer performs packet retransmission.

For example, after the RLC layer of the terminal device receives the upper layer indication sent by the application layer of the terminal device, if the RLC layer of the terminal device finds that: the data packet whose RLC SN is 21, 22, 24, 26, 27...50 If it has been submitted to the upper layer, the generated RLC status report indicates that: 23, 25 have not been received, and the data packets after 51 and 51 have not been received. Among them, when the RLC layer of the network device receives the RLC status report, the RLC layer of the network device retransmits the 23 and 25 data packets, and for the data packets after 51 and 51, the network device needs to first judge whether these packets have been sent to the terminal device Sent, if already sent, retransmit these packets, if not sent to the terminal device, do not retransmit.

Optionally, the data packet retransmission indication (that is, in the RLC status report) may also indicate the retransmission of at least one bit of information of the data packet that needs to be retransmitted, which is not limited here. That is to say, if the RLC layer of the terminal device finds that a certain data packet has been received partly and part has not yet been received, the RLC layer of the terminal device can instruct the network device to resend the data packet through a data packet retransmission indication. a certain part. For example, the No. 23 data packet has a total of 1000Bytes, only 0-299Bytes are received, and the 300-999Bytes have not been received, then the RLC layer of the terminal device can indicate the RLC layer of the network device through the RLC status report (that is, the packet retransmission indication) " Retransmit the 300-999 Bytes of the data packet with RLC SN=23". Understandably, for a network device, when the RLC status report received by the RLC layer of the network device indicates "retransmit the 300-999 bytes of the data packet with RLC SN=23", the network device can retransmit the 23rd packet corresponding to The entire data packet (that is, the complete data packet), or only the 300-999Bytes of the No. 23 packet can be retransmitted, which is determined according to the actual application scenario. , without limitation here.

② When the RLC layer of the terminal device receives the upper layer indication sent by the application layer of the terminal device, and the upper layer indication is used to indicate the previous data packet of the data packet that needs to be retransmitted or the next data packet of the data packet that needs to be retransmitted , the RLC layer of the terminal device can determine the data packet that has not been submitted to the upper layer according to the upper layer instruction, that is, the data packet that needs to be retransmitted, and then generate an RLC status report as a data packet retransmission instruction and send it to the network device (or described as the network device RLC layer) to notify the RLC layer of the network device to perform packet retransmission.

For example, assuming that the data packet indicated by the upper layer indication is the previous data packet of the data packet that needs to be retransmitted, and the data packet indicated by the upper layer indication is the data packet corresponding to RLC SN equal to 22 and 24, then when the terminal device After the RLC layer receives the upper layer indication sent by the application layer of the terminal device, the RLC layer of the terminal device will indicate in the generated RLC status report that the data packets with RLC SN equal to 23 and 25 have not been received. Wherein, after the RLC layer of the network device receives the RLC status report, the RLC layer of the network device retransmits the No. 23 data packet and the No. 25 data packet.

For another example, assuming that the data packet indicated by the upper layer indication is the last data packet of the data packet that needs to be retransmitted, and the data packet indicated by the upper layer indication is the data packet corresponding to RLC SN equal to 24 and 26, then when the terminal device After the RLC layer of the terminal device receives the upper layer indication sent by the application layer of the terminal device, the RLC layer of the terminal device will indicate in the generated RLC status report that the data packets with RLC SN equal to 23 and 25 have not been received. Wherein, after the RLC layer of the network device receives the RLC status report, the RLC layer of the network device retransmits the No. 23 data packet.

Optionally, the data packet retransmission indication (that is, in the RLC status report) may also indicate the retransmission of at least one bit of information of the data packet that needs to be retransmitted, which is not limited here.

③ If the lost data packet is the last data packet or multiple data packets among the multiple data packets included in the i-th business frame, the application layer of the terminal device can use an inter-layer primitive to indicate "please retransmit the i-th The last N data packets of the service frame". That is, the upper layer indication is used to indicate the first data packet, wherein the first data packet is the last N data packets of the i-th business frame, and the incorrectly received data packet is the last N data packets of the i-th business frame, N is a positive integer greater than or equal to 1. Therefore, the RLC layer of the terminal device can determine the data packet that has not been submitted to the upper layer according to the instruction of the upper layer, that is, the data packet that needs to be retransmitted, and then generate an RLC status report as a data packet retransmission instruction and send it to the network device (or described as a network device RLC layer) to notify the RLC layer of the network device to perform packet retransmission.

④ When the RLC layer of the terminal device receives the upper layer indication sent by the application layer of the terminal device, and the upper layer indication is used to directly indicate the RLC SN of the data packet that needs to be retransmitted, the RLC layer of the terminal device can determine that there is no upward direction according to the upper layer indication. The data packet submitted by the layer, that is, the data packet that needs to be retransmitted, and then generates an RLC status report as a data packet retransmission indication and sends it to the network device (or described as the RLC layer of the network device) to notify the RLC layer of the network device to execute the data. Packet retransmission.

For example, assuming that the data packet indicated by the upper layer instruction is the data packet corresponding to RLC SN equal to 23, then when the RLC layer of the terminal device receives the upper layer instruction sent by the application layer of the terminal device, the RLC layer of the terminal device will The generated RLC status report indicates that packet 23 has not been received. Wherein, after the RLC layer of the network device receives the RLC status report, the RLC layer of the network device retransmits the No. 23 data packet.

3. The MAC layer of the terminal device triggers retransmission

For the MAC layer of the terminal device, when the MAC layer of the terminal device receives the upper layer instruction sent by the application layer of the terminal device, the MAC layer of the terminal device can receive the data packet according to the HARQ process in the MAC layer, or whether Decode the successful data packet and submit the data to the upper layer to determine whether to trigger retransmission. It is broken down into the following three situations:

1. Taking the received upper layer instruction as the reference time point, push forward for a period of time, such as T_burst, if a HARQ process has received a transmission block within the T_burst time period, but has not successfully decoded it, notify the MAC layer of the network device to retry Transmission block of the HARQ process.

2. Taking the received upper layer instruction as the reference time point, push forward for a period of time, such as T_burst, if a HARQ process has received a transport block within the T_burst time period, has decoded it successfully, and submitted it to the upper layer, it will not trigger a retry pass.

3. Taking the received upper layer instruction as the reference time point, push forward for a period of time, such as T_burst, if a HARQ process has not received a transmission block within the T_burst time period, retransmission will not be triggered.

Wherein, the specific value of T_burst may be configured by a network device, or may also be specified by a protocol, which is not limited in this embodiment of the present application.

Optionally, in some feasible implementation manners, for the retransmission triggered by the PDCP layer, RLC layer or MAC layer of the terminal device, the access layer (that is, the PDCP layer, RLC layer or MAC layer) of the terminal device sends the terminal device After the application layer of the application layer sends the data packet of the i-th service frame, the access layer of the terminal device starts the timer; if the timer expires and no instruction from the upper layer is received, the access layer of the terminal device clears the receiving buffer and restarts the timer. Set the receiving variable (for example, set the receiving variable to 0, or reset the receiving variable to the next data packet that needs to be received, that is, the SN of the data packet waiting to be received). Wherein, the timing duration of the timer may be indicated by the network device, or may be predefined, for example, it may be [X]ms, etc., which is not limited here. It can be understood that the "reception variable" involved in the embodiment of the present application can be understood as a parameter maintained by the protocol stack of the terminal device and used to indicate the current reception situation. For example, please refer to FIG. 8a, which is a schematic diagram of a scenario of data packet reception provided by the embodiment of the present application. As shown in Figure 8a, packet 23 has been received, packet 24 has not been received, packets 25 and 29 have been received, and packets 26, 27, and 28 have not been received.

For example, if the PDCP layer of the terminal device does not receive an instruction from the upper layer of the application layer of the terminal device within a period of time after receiving the data packet of the i-th service frame, the receiving buffer of the PDCP layer can be cleared and the PDCP layer can be reset to prepare to receive the data packet of the next service frame (that is, the i+1th service frame). Here, the receiving variable of the PDCP layer can be understood as the SN of the last data packet that the PDCP layer has successfully submitted to the upper layer, that is, the data packets before the SN are no longer considered for retransmission. Taking the above-mentioned Figure 8a as an example, the receiving variable is 23 Or, the receiving variable of the PDCP layer can be understood as the SN of the next packet that the PDCP layer expects to receive, that is, the meaning of the receiving variable is "the SN of the packet with the lowest SN among the data packets not currently received (ie The lowest SN)", taking the above-mentioned Figure 8a as an example, the receiving variable is packet No. 24; or, the receiving variable of the PDCP layer can be understood as the SN of the packet with the highest SN among the data packets currently received by the PDCP layer (that is, the highest SN), taking the above-mentioned FIG. 8a as an example, the received variable is packet No. 29.

It should be noted that, in the above examples, SN inversion is not considered, but in actual implementation, inversion needs to be considered. For example, the value range of SN is 0-4095, that is, after counting to 4095, the next SN starts from 0 again. If the SN is reversed, the above-mentioned "highest SN, lowest SN" refers to the end position SN of the window and the SN at the beginning of the window within the PDCP receiving window, rather than the absolute value of the SN. For example, please refer to FIG. 8b, which is a schematic diagram of another scenario of data packet reception provided by the embodiment of the present application. As shown in Figure 8b, packet 4094 has been received, packet 4095 has not been received, and packets 0 and 4 have been received Upon receipt, packages No. 1, 2, and 3 have not been received. Taking FIG. 8b as an example, the receiving variables of PDCP can be 4 and 4094.

For another example, if the RLC layer of the terminal device does not receive an upper-layer instruction from the application layer of the terminal device within a period of time after receiving the data packet of the i-th service frame, the receiving buffer of the RLC layer can be cleared and the RLC layer can be reset. The receiving variable of the layer is ready to receive the data packet of the next service frame (that is, the i+1th service frame). Here, the receiving variable of the RLC layer can be understood as the SN with the highest SN that has been received in the current window (if some segments have been received, it is the received segment), as shown in No. 29 in Figure 8a or, within the current window, the SN with the lowest SN (if some segments have been received, it is the part of the segment that has not been received); or, within the current window, the SN that has been received packets and/or fragments.

For another example, if the HARQ process in the MAC layer of the terminal device does not receive an instruction from the upper layer of the application layer of the terminal device within a period of time after receiving the transport block, the HARQ buffer may be cleared.

In this embodiment of the application, the application layer of the terminal device determines whether it is necessary to retransmit the data packet. If the incorrectly received data packet is an important data packet, the application layer of the terminal device considers that retransmission needs to be triggered, so it will notify the terminal device The access layer triggers retransmission. If the application layer of the terminal device determines that the incorrectly received data packets are not important data packets, the application layer of the terminal device considers that retransmission does not need to be triggered, and does not notify the access layer of retransmission. Since the important data packets in a video frame only account for a small part, the application layer of the terminal device will not trigger retransmission for most of the "incorrectly received data packets" scenarios. Based on this, on the basis of ensuring the block error rate of important data packets, it can reduce the number of retransmitted data packets and improve spectrum efficiency. At the same time, it can also reduce communication complexity and have high applicability.

Please refer to FIG. 9. FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application. The communication device may be a terminal device or a device (such as a chip) having the function of a terminal device. Specifically, as shown in FIG. 9, the communication device 900 may include:

A determining unit 901, configured to determine that the incorrectly received data packets include at least one important data packet;

The transceiver unit 902 is configured to send a data packet retransmission instruction to the network device.

Optionally, the data packet retransmission indication is used to indicate the retransmission of M data packets, or the data packet retransmission indication is used to indicate the retransmission of at least one bit of information in each of the M data packets Pass, the M is a positive integer.

Optionally, the transceiver unit 902 is also used for:

The determining unit 901 is specifically configured to:

Optionally, the determining unit 901 is specifically configured to:

The at least one important data packet included in the incorrectly received data packets in the i-th service frame is determined by the application layer of the terminal device according to the received data packet of the i-th service frame.

Optionally, the transceiver unit 902 is specifically configured to:

Optionally, the device also includes:

The timing unit 903 is configured to start a timer after the access layer of the terminal device sends the data packet of the i-th service frame to the application layer of the terminal device;

The releasing unit 904 is configured to clear the receiving buffer in the access layer of the terminal device and reset the receiving variable if the timer expires and the upper layer instruction has not been received.

Optionally, the upper layer indication is used to indicate the retransmission of the data packet, including:

Optionally, the upper layer instruction is used to instruct data packet retransmission, including:

Optionally, the SN of the at least one data packet that needs to be retransmitted is the PDCP SN of the at least one data packet that needs to be retransmitted, or the RLC SN of the at least one data packet that needs to be retransmitted.

Optionally, the access layer is a Packet Data Convergence Protocol PDCP layer, a Radio Link Control RLC layer or a Media Access Control MAC layer.

The embodiment of the present application also provides a chip, which can execute the relevant steps of the electronic device in the foregoing method embodiments. The chip includes a processor and a communication interface, the processor is configured to cause the chip to perform the following operations:

It is determined that at least one important data packet is included in the incorrectly received data packets;

Send a data packet retransmission indication to the network device.

Optionally, also include:

The determined incorrectly received data packets include at least one important data packet, including:

Optionally, the determining the at least one important data packet included in the incorrectly received data packet in the i-th service frame according to the received data packet of the i-th service frame includes:

Optionally, the sending a data packet retransmission indication to the network device includes:

Optionally, also include:

After sending the data packet of the i-th service frame to the application layer of the terminal device through the access layer of the terminal device, start a timer;

If the timer expires and the upper layer instruction has not been received, clear the receiving buffer in the access layer of the terminal device and reset the receiving variable.

It should be noted that the above-mentioned chip includes at least one processor, at least one first memory and at least one second memory; wherein, the aforementioned at least one first memory and the aforementioned at least one processor are interconnected through lines, and the aforementioned first memory stores Instructions; the aforementioned at least one second memory and the aforementioned at least one processor are interconnected through a line, and the aforementioned second memory stores the data that needs to be stored in the aforementioned method embodiments.

For each device or product applied to or integrated in the chip, each module contained therein may be implemented by means of hardware such as circuits, or at least some of the modules may be implemented by means of software programs, which run on the internal integrated components of the chip. The processor and the remaining (if any) modules can be realized by hardware such as circuits.

Please refer to FIG. 10 . FIG. 10 is a schematic structural diagram of another communication device provided by an embodiment of the present application. The communication device may be a terminal device or a network device. The communication device 100 may include a memory 1001 and a processor 1002 . Optionally, a communication interface 1003 is also included. The memory 1001 , the processor 1002 and the communication interface 1003 are connected through one or more communication buses 1004 . Wherein, the communication interface 1003 is controlled by the processor 1002 for sending and receiving information.

The memory 1001 may include read-only memory and random-access memory, and provides instructions and data to the processor 1002 . A portion of memory 1001 may also include non-volatile random access memory.

The communication interface 1003 is used to receive or send data.

The processor 1002 may be a central processing unit (Central Processing Unit, CPU), and the processor 1002 may also be other general-purpose processors, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) ), off-the-shelf Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components pieces etc. The general-purpose processor may be a microprocessor, and optionally, the processor 1002 may also be any conventional processor. in:

The memory 1001 is used for storing program instructions.

The processor 1002 is configured to call the program instructions stored in the memory 1001 .

The processor 1002 invokes the program instructions stored in the memory 1001 to make the communication device 100 execute the method executed by the terminal device or the network device in the foregoing method embodiments.

Please refer to FIG. 11 . FIG. 11 is a schematic structural diagram of a module device provided by an embodiment of the present application. The module device 1100 can perform related steps of the terminal device or network device in the foregoing method embodiments, and the module device 1100 includes: a communication module 1101 , a power module 1102 , a storage module 1103 and a chip 1104 .

Among them, the power supply module 1102 is used to provide power for the module equipment; the storage module 1103 is used to store data and instructions; the communication module 1101 is used for internal communication of the module equipment, or for communication between the module equipment and external equipment ; The chip 1104 is used to execute the method executed by the terminal device or the network device in the above method embodiment.

It should be noted that for the content not mentioned in the embodiments corresponding to FIG. 9 , FIG. 10 and FIG. 11 and the specific implementation manner of each step, refer to the embodiment shown in FIG. 4 and the foregoing content, and details are not repeated here.

The embodiment of the present application also provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instruction is run on a processor, the method flow of the above-mentioned method embodiment is implemented.

The embodiment of the present application further provides a computer program product. When the computer program product is run on a processor, the method flow of the above method embodiment is realized.

Regarding each device described in the above embodiments, each module/unit contained in the product may be a software module/unit, or a hardware module/unit, or may be partly a software module/unit and partly a hardware module/unit. . For example, for each device applied to or integrated in a chip, each module/unit contained in the product may be realized by hardware such as a circuit, or at least part of the modules/units may be realized by a software program, and the software program runs The processor is integrated inside the chip, and the remaining (if any) modules/units can be realized by hardware such as circuits; Realized by means of hardware such as circuits, different modules/units can be located in the same part of the chip module (such as chips, circuit modules, etc.) or in different components, or at least part of the modules/units can be implemented in the form of software programs, the software program Running on the integrated processor inside the chip module, the remaining (if any) modules/units can be realized by hardware such as circuits; It is implemented by means of hardware such as circuits, and different modules/units can be located in the same component (such as chips, circuit modules, etc.) or different components in the terminal, or at least some modules/units can be implemented by software programs. The program runs on the processor integrated in the terminal, and the remaining (if any) modules/units can be implemented by means of hardware such as circuits.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence. Because of this application, certain operations may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by this application.

The descriptions of the various embodiments provided in this application can refer to each other, and the descriptions of each embodiment have their own emphases. For the parts that are not described in detail in a certain embodiment, you can refer to the relevant descriptions of other embodiments. For the convenience and brevity of description, for example, regarding the functions and operations of the various devices and devices provided in the embodiments of the present application, reference may be made to the relevant descriptions of the method embodiments of the present application. May be cross-referenced, combined or cited.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. scope.

Claims

A communication method, characterized in that the method comprises:

The terminal device determines that at least one important data packet is included in the incorrectly received data packet;

The terminal device sends a data packet retransmission indication to the network device.
The method according to claim 1, wherein the data packet retransmission indication is used to indicate the retransmission of M data packets, or the data packet retransmission indication is used to indicate that each of the M data packets Retransmission of at least one bit of information in the data packet, where M is a positive integer.
The method according to claim 1 or 2, characterized in that the method further comprises:

The terminal device receives the data packet of the i-th service frame, and the i is a positive integer greater than or equal to 1;

The terminal device determines that at least one important data packet is included in the incorrectly received data packet, including:

The terminal device determines, according to the received data packet of the ith service frame, that the incorrectly received data packet in the ith service frame includes the at least one important data packet.
The method according to claim 3, characterized in that, the terminal device determines the information included in the incorrectly received data packet in the i-th service frame according to receiving the data packet of the i-th service frame The at least one important data package includes:

The application layer of the terminal device determines the at least one important data packet included in the incorrectly received data packet in the i-th service frame according to the received data packet of the i-th service frame.
The method according to any one of claims 1-4, wherein the terminal device sends a data packet retransmission instruction to the network device, including:

The application layer of the terminal device sends an upper layer indication to the access layer of the terminal device, where the upper layer indication is used to instruct data packet retransmission;

The access layer of the terminal device sends a data packet retransmission indication to the network device.
The method according to claim 5, wherein the method further comprises:

After the access layer of the terminal device sends the data packet of the i-th service frame to the application layer of the terminal device, start a timer;

If the timer expires and the upper layer instruction is not received yet, the access layer of the terminal device clears the receiving buffer and resets the receiving variable.
The method according to claim 5 or 6, wherein the upper layer indication is used to indicate the retransmission of the data packet, comprising:

The upper layer indication is used to indicate the first data packet, and the first data packet is a data packet correctly received after the second data packet of the i-th service frame, or the first data packet is the i-th service frame A data packet that is correctly received before the second data packet of the frame, and the second data packet is a data packet that is not correctly received in the ith service frame.
The method according to claim 5 or 6, wherein the upper layer indication is used to indicate the retransmission of the data packet, comprising:

The upper layer indication is used to indicate the first data packet, wherein the first data packet is the last N data packets of the ith service frame, and the incorrectly received data packet is the last N data packet of the ith service frame. The last N data packets, where N is a positive integer greater than or equal to 1.
The method according to claim 5 or 6, wherein the upper layer instruction is used to instruct data packet retransmission, comprising:

The upper layer indication is used to indicate the SN of at least one data packet that needs to be retransmitted.
The method according to claim 9, wherein the SN of the at least one data packet that needs to be retransmitted is the PDCP SN of the at least one data packet that needs to be retransmitted, or the at least one data packet that needs to be retransmitted The RLC SN of the packet.
The method according to any one of claims 5-10, wherein the access layer is a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer or a Media Access Control (MAC) layer.
A communication device, characterized in that the device includes:

A determining unit, configured to determine that at least one important data packet is included in the incorrectly received data packets;

The transceiver unit is configured to send a data packet retransmission instruction to the network device.
The communication device according to claim 12, wherein the data packet retransmission indication is used to indicate the retransmission of M data packets, or the data packet retransmission indication is used to indicate that each of the M data packets Retransmission of at least one bit information of data packets, where M is a positive integer.
The communication device according to claim 12 or 13, wherein the transceiver unit is further used for:

Receive the data packet of the i-th business frame, where i is a positive integer greater than or equal to 1;

The determining unit is specifically used for:

Determine the at least one important data packet included in the incorrectly received data packets in the i-th service frame according to the received data packets of the i-th service frame.
The communication device according to claim 14, wherein the determining unit is specifically configured to:

The application layer of the terminal device determines the at least one important data packet included in the incorrectly received data packet in the i-th service frame according to the received data packet of the i-th service frame.
The communication device according to any one of claims 12-15, wherein the transceiver unit is specifically used for:

Send an upper-layer indication to the access layer of the terminal equipment through the application layer of the terminal equipment, and the upper-layer indication uses To instruct packet retransmission;

Sending a data packet retransmission indication to the network device through the access layer of the terminal device.
The communication device according to claim 16, further comprising:

A timing unit, configured to start a timer after the access layer of the terminal device sends the data packet of the i-th service frame to the application layer of the terminal device;

The release unit is configured to clear the receiving buffer in the access layer of the terminal device and reset the receiving variable if the timer expires and the upper layer instruction has not been received.
The communication device according to claim 16 or 17, wherein the upper layer indication is used to indicate the retransmission of the data packet, including:

The upper layer indication is used to indicate the first data packet, and the first data packet is a data packet correctly received after the second data packet of the i-th service frame, or the first data packet is the i-th service frame A data packet that is correctly received before the second data packet of the frame, and the second data packet is a data packet that is not correctly received in the ith service frame.
The communication device according to claim 16 or 17, wherein the upper layer indication is used to indicate the retransmission of the data packet, including:

The upper layer indication is used to indicate the first data packet, wherein the first data packet is the last N data packets of the ith service frame, and the incorrectly received data packet is the last N data packet of the ith service frame. The last N data packets, where N is a positive integer greater than or equal to 1.
The communication device according to claim 16 or 17, wherein the upper layer instruction is used to instruct data packet retransmission, including:

The upper layer indication is used to indicate the SN of at least one data packet that needs to be retransmitted.
The communication device according to claim 20, wherein the SN of the at least one data packet that needs to be retransmitted is the PDCP SN of the at least one data packet that needs to be retransmitted, or the at least one data packet that needs to be retransmitted RLC SN of the packet.
The communication device according to any one of claims 16-21, wherein the access layer is a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer or a Media Access Control (MAC) layer.
A chip, characterized by comprising a processor and a communication interface, the processor configured to make the chip execute the method according to any one of claims 1-11.
A module device, characterized in that the module device includes a communication module, a power supply module, a storage module, and a chip, wherein:

The power supply module is used to provide electric energy for the module equipment;

The storage module is used to store data and instructions;

The communication module is used for internal communication of the module equipment, or for the communication between the module equipment and external equipment;

The chip is used to execute the method according to any one of claims 1-11.
A communication device, characterized in that it includes a memory and a processor, the memory is used to store a computer program, the computer program includes program instructions, and the processor is configured to call the program instructions to enable the communication The device executes the method according to any one of claims 1-11.
A computer-readable storage medium, characterized in that computer-readable instructions are stored in the computer-readable medium, and when the computer-readable instructions are run on a communication device, the communication device is made to execute claims 1-11 any one of the methods described.