WO2022133918A1

WO2022133918A1 - Decoding failure processing method, apparatus and system

Info

Publication number: WO2022133918A1
Application number: PCT/CN2020/139059
Authority: WO
Inventors: 廖树日; 窦圣跃; 黄曲芳; 谭志远; 许子杰
Original assignee: 华为技术有限公司
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2022-06-30
Also published as: CN116391431A

Abstract

The present application is applied to the field of mobile communications. Disclosed are a decoding failure processing method and apparatus. The method comprises: an access network device sending first indication information to a terminal device, wherein the first indication information indicates the delivery of a data packet, the decoding of which fails at a physical layer, to a MAC layer; and when the decoding of the data packet fails at the physical layer, the terminal device delivering the data packet to the MAC layer on the basis of the first indication information. An access network device configures which data packets are delivered to a MAC layer when the decoding of the data packets fails at a physical layer, and the other data packets are not delivered when the decoding fails, thereby facilitating the highly-reliable transmission of low-latency services, and reducing the waste of air interface resources that is caused by the use of network coding for error correction in all services of a terminal device. In addition, bearer information of scheduled data is acquired on the basis of DCI of the scheduled data, and the bearer information is then delivered to an upper layer, thereby eliminating a data transmission error caused by delivering the scheduled data to a wrong RLC entity when an LCID transmission error occurs.

Description

Decoding failure processing method, device and system

technical field

The present application relates to the field of mobile communication technologies, and in particular, to a method, device and system for processing decoding failure.

Background technique

With the continuous advancement and improvement of extended reality (XR) technology, related industries have been booming. Today, extended reality technology has entered into education, entertainment, military, medical, environmental protection, transportation, public health and other fields closely related to people's production and life. Extended reality is a general term for various reality-related technologies, including: virtual reality (VR), augmented reality (AR) and mixed reality (MR). Among them, virtual reality technology mainly refers to the rendering of visual and audio scenes to simulate the visual and audio sensory stimulation of users in the real world as much as possible. Augmented reality technology mainly refers to providing visual or auditory additional information or artificially generated content in the real environment perceived by the user. Mixed reality technology is an advanced form of AR, and one of the ways it is implemented is by inserting some virtual elements into a physical scene, with the purpose of providing users with an immersive experience where these elements are part of the real scene. The XR service requires high transmission rate and low transmission delay. When XR is applied in the wireless communication scenario, the limitation caused by the connection line can be avoided, but the wireless communication channel is prone to fluctuations, which may lead to a series of problems such as freezes and blurred screens in the XR service, which seriously affects the user experience. How to improve the wireless communication scenario The reliability of data transmission in the medium and ensuring low latency have become problems that those skilled in the art need to solve urgently.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a method, apparatus, and system for processing decoding failure. According to the technical solution provided by the present application, the access network device sends first indication information to the terminal device, and the first indication information indicates that the decoding failure at the physical layer is delivered to the terminal device. The packet goes to the media access control (MAC) layer. When the data packet fails to be decoded at the physical layer, the terminal device submits the data packet to the MAC layer based on the first indication information. Configure which data packets are delivered to the MAC layer when the physical layer decoding fails through the access network device, and other data packets are not delivered when the decoding fails, which is conducive to the highly reliable transmission of low-latency services and reduces all services of the terminal equipment. The waste of air interface resources caused by using network coding for error correction. In addition, the bearer information of the scheduled data is obtained through the downlink control information (DCI) based on the scheduling data and submitted to the upper layer, thereby eliminating the transmission error in the logical channel identity (LCID) The following data transmission error caused by delivering the scheduled data to the wrong radio link control (RLC) entity.

In a first aspect, a communication method is provided. It can be understood that the method of the first aspect can be performed by a first apparatus, and the first apparatus can be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip, a chip system or a processor. The following description is given by taking the method being executed by a terminal device as an example.

The method includes: the terminal device receives first indication information from an access network device, the first indication information indicates that a data packet that fails to be decoded at the physical layer is delivered to an upper layer, and the upper layer may include a MAC layer, an RLC layer, a packet data convergence layer protocol ( packet data convergence protocol, PDCP) layer or network coding layer. The terminal device receives the first data packet from the access network device, and when the first data packet fails to be decoded at the physical layer, submits the first data packet to the upper layer based on the first indication information. Configure which data packets are delivered to the upper layer when the decoding of the physical layer fails through the access network device, and other data packets are not delivered when the decoding fails, which is conducive to the highly reliable transmission of low-latency services and reduces the use of the network for all services of the terminal device. The waste of air interface resources caused by coding error correction.

In a possible implementation manner of the first aspect, the terminal device receives a radio resource control (radio resouce control, RRC) message from the access network device, where the RRC message includes the first indication information. The first indication information may be bearer-level indication information, that is, the first indication information specifically instructs the terminal device to deliver the data packets transmitted on a certain bearer and failed to be decoded at the physical layer to the upper layer. The first indication information may include identification information of the bearer. By configuring the first indication information at the bearer level, different processing can be performed for different bearers to meet the service transmission requirements. Optionally, the terminal device obtains the identification information of the bearer of the first data packet at the physical layer, and determines whether to deliver the first data packet to the upper layer based on the first indication information and the identification information of the bearer.

In another possible implementation manner of the first aspect, the terminal device receives DCI from the access network device, where the DCI includes the first indication information. The first indication information specifically instructs the terminal device to deliver the data packets scheduled by the DCI and failing to be decoded at the physical layer to the upper layer. The first indication information may be carried by the content included in the DCI, that is, the explicit first indication information. The first indication information may also be embodied in a DCI format, that is, the implicit first indication information. By including the first indication information in the DCI, it is beneficial to more flexibly indicate which data packets are delivered to the upper layer after decoding failure.

In the first aspect and any possible implementation manner of the first aspect, optionally, the terminal device submits the first data packet and the second indication information to the upper layer, and the second indication information indicates that the first data packet is decoded at the physical layer failure, or the second indication information indicates whether the decoding of the first data packet succeeds or the decoding fails. The upper layer can distinguish which data packets fail to be decoded at the physical layer and which data packets are successfully decoded at the physical layer, so that different processing can be performed to improve processing efficiency and reduce unnecessary waste of processing resources.

In the first aspect and any possible implementation manner of the first aspect, optionally, the terminal device obtains the identification information carried by the first data packet at the physical layer, and the terminal device submits the first data packet and the first data packet The identification information of the bearer is sent to the upper layer, thereby, for example, eliminating the data transmission error caused by delivering the first data packet to the wrong RLC entity in the case of an LCID transmission error.

In a second aspect, a communication method is provided. It can be understood that the method of the second aspect can be executed by a second apparatus, and the second apparatus can be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip, a chip system or a processor. The following description will be given by taking the method being executed by an access network device as an example.

The method includes: the access network device generates first indication information, and sends the first indication information to the terminal device, the first indication information indicates that the data packet that fails to be decoded at the physical layer is delivered to the upper layer, and the upper layer may include a MAC layer, an RLC layer, PDCP layer or network coding layer. Configure which data packets are delivered to the upper layer when the decoding of the physical layer fails through the access network device, and other data packets are not delivered when the decoding fails, which is conducive to the highly reliable transmission of low-latency services and reduces the use of the network for all services of the terminal device. The waste of air interface resources caused by coding error correction.

In a possible implementation manner of the second aspect, the access network device sends an RRC message to the terminal device, where the RRC message includes the first indication information. The first indication information may be bearer-level indication information, that is, the first indication information specifically instructs the terminal device to deliver the data packets transmitted on a certain bearer and failed to be decoded at the physical layer to the upper layer. The first indication information may include a bearer identifier of the bearer. By configuring the first indication information at the bearer level, different processing can be performed for different bearers to meet the service transmission requirements.

In another possible implementation manner of the second aspect, the access network device sends DCI to the terminal device, where the DCI includes the first indication information. The first indication information specifically instructs the terminal device to deliver the data packets scheduled by the DCI and failing to be decoded at the physical layer to the upper layer. The first indication information may be carried by the content included in the DCI, that is, the explicit first indication information. The first indication information may also be embodied in a DCI format, that is, the implicit first indication information. By including the first indication information in the DCI, it is beneficial to more flexibly indicate which data packets are delivered to the upper layer after decoding failure.

In a third aspect, a communication method is provided. It can be understood that the method of the third aspect may be performed by a first apparatus, and the first apparatus may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip, a chip system or a processor. The following description is given by taking the method being executed by a terminal device as an example.

The method includes: a terminal device receives a second DCI from an access network device, and the terminal device receives a second data packet from the access network device, where the second data packet is a data packet scheduled by the second DCI. The terminal device obtains the identification information of the bearer of the second data packet at the physical layer based on the second DCI, so as to perform related processing based on the identification information of the bearer, for example, submit the identification information of the bearer to the upper layer, or based on the identification information of the bearer It is determined whether to deliver the second data to the upper layer.

In a possible implementation manner of the third aspect, the second DCI includes bearer identification information of the second data packet, and the bearer identification information may be a bearer identification or a bearer LCID. The physical layer of the terminal device may acquire the bearer identifier or LCID of the bearer of the second data packet from the content of the second DCI.

In another possible implementation manner of the third aspect, the second DCI includes bearer identification information of the second data packet, and the bearer identification information may be a bearer LCID index or a bearer index. Before receiving the second DCI, the terminal device obtains the corresponding relationship, and the corresponding relationship may be predefined or configured by the access network device. The correspondence is the correspondence between the bearer index of the bearer of the second data packet and the bearer identifier, or the correspondence between the LCID index of the bearer of the second data packet and the LCID of the bearer. The terminal device obtains the bearer identifier or LCID of the bearer of the second data packet based on the corresponding relationship and the bearer index or LCID index of the bearer of the second data packet. Since the bits occupied by the LCID index or the bearer index may be less than the bits occupied by the corresponding LCID or the corresponding bearer identification, the signaling overhead of the second DCI is saved.

In another possible implementation manner of the third aspect, the identification information of the bearer of the second data packet is obtained based on the DCI format of the second DCI, and the DCI format of the second DCI corresponds to the bearer identification or LCID of the second data packet relation. Before receiving the second DCI, the terminal device obtains the corresponding relationship, and the corresponding relationship may be predefined or configured by the access network device. The correspondence is the correspondence between the DCI format of the second DCI and the bearer identifier or LCID. The terminal device obtains the bearer identifier or LCID of the bearer of the second data packet based on the corresponding relationship and the DCI format of the second DCI.

In the third aspect and any possible implementation manner of the third aspect, optionally, it can be combined with the method of the first aspect. The second DCI is the same DCI as the first DCI, and the second data packet is the same data packet as the first data packet. After the second data packet fails to be decoded at the physical layer, the terminal device (specifically, the physical layer of the terminal device) obtains the bearer identifier or LCID of the bearer of the second data packet, and determines whether to submit it based on the first indication information and the bearer identification information. The second packet goes to the upper layer. Specifically, the terminal device may determine whether it has received the first indication information corresponding to the bearer of the second data packet. If the terminal device receives the corresponding first indication information, it delivers the second data packet to the upper layer. If the terminal device does not receive the corresponding first indication information, the second data packet is not delivered.

In the third aspect and any possible implementation manner of the third aspect, optionally, the terminal device submits the second data packet and the identification information carried by the second data packet to the upper layer, and the upper layer may include a MAC layer and an RLC layer , PDCP layer or network coding layer. The identification information may include bearer identification, or logical channel identification LCID, or LCID index, or bearer index. Optionally, when combined with the method of the first aspect, the upper layer can deliver the second data packet to the corresponding RLC entity based on the identification information, thereby eliminating the need for the second data packet to be delivered to the wrong LCID in the case of an error in the transmission of the LCID. Data transmission error caused by RLC entity. Optionally, the MAC PDU included in the second data packet does not include the LCID, or the MAC PDU included in the second data packet includes the LCID, but the MAC layer of the terminal device ignores the LCID.

In a fourth aspect, a communication method is provided. It can be understood that the method of the fourth aspect can be performed by a second device, which can be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip, a chip system or a processor. The following description will be given by taking the method being executed by an access network device as an example.

The method includes: the access network device generates a second DCI and sends the second DCI to the terminal device, where the second DCI includes identification information of the bearer of the data packet scheduled by the second DCI, so that the terminal device can obtain the second DCI based on the second DCI The bearer identification information of the data packet scheduled by the DCI, and perform related processing based on the bearer identification information, for example, submit the bearer identification information to the upper layer, or determine whether to deliver the data packet to the upper layer based on the bearer identification information .

Optionally, the identification information includes a bearer identification, or a logical channel identification LCID, or an LCID index, or a bearer index.

In a possible implementation manner of the fourth aspect, the content of the second DCI includes identification information of the bearer of the data packet scheduled by the second DCI.

In another possible implementation manner of the fourth aspect, there is a corresponding relationship between the DCI format of the second DCI and the bearer identifier or LCID of the data packet scheduled by the second DCI.

In a fifth aspect, a communication device is provided, the communication device having a function of implementing the behavior in the method of the first aspect above. The functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions. The communication device may be a terminal device, or a device capable of supporting the terminal device to implement the functions in the method of the first aspect. For example, the communication device may be a chip, a chip system, or a processor.

In a possible design, the communication apparatus includes: a receiving unit, configured to receive first indication information from an access network device, where the first indication information indicates that a data packet that fails to be decoded at the physical layer is delivered to an upper layer, and the upper layer may include a MAC layer, RLC layer, PDCP layer or network coding layer, the receiving unit is further configured to receive the first data packet from the access network device; the processing unit is configured to base on the first indication information when the first data packet fails to be decoded at the physical layer Submit the first packet to the upper layer. These units or modules may perform the corresponding functions in the method examples of the first aspect. For details, please refer to the detailed descriptions in the method examples, which will not be repeated here.

In a sixth aspect, a communication device is provided, the communication device having a function of implementing the behavior in the method of the second aspect above. The functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions. The communication device may be an access network device, or a device capable of supporting the access network device to implement the functions in the method of the second aspect. For example, the communication device may be a chip, a chip system, or a processor.

In a possible design, the communication apparatus includes: a processing unit, configured to generate first indication information, where the first indication information indicates that the data packet that fails to be decoded at the physical layer is delivered to the upper layer, and the upper layer may include a MAC layer, an RLC layer, a PDCP layer layer or network coding layer; a sending unit, configured to send the first indication information to the terminal device. These units or modules may perform the corresponding functions in the method examples of the second aspect. For details, please refer to the detailed descriptions in the method examples, which will not be repeated here.

In a seventh aspect, a communication device is provided, the communication device having a function of implementing the behavior in the method of the third aspect. The functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions. The communication device may be a terminal device, or a device capable of supporting the terminal device to implement the functions in the method of the third aspect. For example, the communication device may be a chip, a chip system or a processor.

In a possible design, the communication apparatus includes: a receiving unit, configured to receive the second DCI from the access network device, the receiving unit is further configured to receive a second data packet from the access network device, and the second data packet is A data packet scheduled by the second DCI; and a processing unit, configured to acquire, at the physical layer, the bearer identification information of the second data packet based on the second DCI. These units or modules may perform the corresponding functions in the method examples of the third aspect. For details, please refer to the detailed descriptions in the method examples, which will not be repeated here.

In an eighth aspect, a communication device is provided, the communication device having a function of implementing the actions in the method of the fourth aspect above. The functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions. The communication device may be an access network device, or a device capable of supporting the access network device to implement the functions in the method of the fourth aspect. For example, the communication device may be a chip, a chip system or a processor.

In a possible design, the communication apparatus includes: a processing unit configured to generate a second DCI; a sending unit configured to send the second DCI to the terminal device, where the second DCI includes an identifier of a bearer of a data packet scheduled by the second DCI Information sending unit. These units or modules may perform the corresponding functions in the method examples of the fourth aspect. For details, please refer to the detailed descriptions in the method examples, which will not be repeated here.

In a ninth aspect, a communication device is provided, and the communication device may be a communication device implementing the method of any one of the above first to fourth aspects, or a communication device configured to implement any of the above first to fourth aspects A chip in a communication device of the method of one aspect. The communication device includes a communication interface, a processor, and optionally, a memory. Wherein, the memory is used to store computer programs or instructions or data, and the processor is coupled with the memory and the communication interface, and when the processor reads the computer program, instructions or data, the communication device is made to perform various aspects of the terminal equipment or the access network. The method performed by the device.

It should be understood that the communication interface may be a transceiver in a communication device, for example, implemented by an antenna, a feeder, a codec, etc. in the communication device, or, if the communication device is a chip set in an access network device, the communication The interface may be an input/output interface of the chip, such as input/output pins and the like. The transceiver is used for the communication device to communicate with other devices. Exemplarily, when the communication device is a terminal device, the other device is an access network device; or, when the communication device is an access network device, the other device is a terminal device.

In a tenth aspect, a chip system is provided, the chip system includes a processor for implementing the communication method of any one of the first to fourth aspects. In one possible design, the system-on-a-chip further includes a memory for storing program instructions and/or data. The chip system can be composed of chips, and can also include chips and other discrete devices.

In an eleventh aspect, a communication system is provided, the system comprising a communication device implementing the method of the first aspect and a communication device implementing the method of the second aspect, or a communication device implementing the method of the third aspect and implementing the fourth aspect The communication device of the method of the aspect.

A twelfth aspect provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed, the method executed by the first access network device in the above aspects is executed, Or cause the method executed by the second access network device in the above aspects to be executed; or cause the method executed by the terminal device in the above aspects to be executed.

A thirteenth aspect provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method executed by the terminal device in the above aspects is implemented; A method of an aspect performed by an access network device.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system to which an embodiment of the application is applied;

FIG. 2 provides a user plane protocol stack and an association relationship diagram of each protocol layer entity provided by an embodiment of the present application;

3 is a flowchart of an example of a communication method provided by an embodiment of the present application;

4 is a flowchart of another example of a communication method provided by an embodiment of the present application;

5 is a flowchart of another example of a communication method provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 7 is another schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 8 is another schematic structural diagram of a communication device provided by an embodiment of the present application;

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

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. It can be understood that the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions of the embodiments of the present application described below can be applied to the network architecture shown in FIG. 1 , wherein FIG. 1 is only an example of a communication system, and the communication system may include multiple terminal devices and multiple network devices. , Figure 1 takes the example of including 2 terminal devices and 2 network devices. Of course, the number of terminal devices in FIG. 1 is just an example, and may be less or more, and the network device may provide services for the terminal devices within the coverage.

In this application, a terminal device is a device with wireless transceiver function, which can be a fixed device, a mobile device, a handheld device, a wearable device, a vehicle, a vehicle-mounted device, or a device built into the above-mentioned device (for example, a communication module or system-on-chip, etc.). The terminal device is used to connect people, objects, machines, etc., and can be widely used in various scenarios. Also sometimes referred to as user equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a mobile phone, a tablet computer, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless device in industrial control Terminals, wireless terminals in IoT systems, wireless terminals in unmanned driving, wireless terminals in telemedicine, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes Wireless terminals, cellular telephones, cordless telephones, session initiation protocol (SIP) telephones, wireless local loop (WLL) stations, personal digital assistants (PDA), wireless communication capable Handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, in-vehicle communication devices, in-vehicle communication processing chips, wearable devices, terminal equipment in 5G networks or future evolution of public land mobile communication networks network, PLMN) terminal equipment, etc. It should be understood that the present application does not limit the specific form of the terminal device.

A network device can be an access network device, and an access network device can also be called a radio access network (RAN) device. A communication device can also be regarded as a device that provides wireless communication functions for terminal devices. Access network equipment includes, but is not limited to, the next-generation base station (generation nodeB, gNB), evolved node B (evolved node B, eNB), baseband unit (baseband Unit, BBU), transceiver point (transmitting and receiving) in 5G, for example, but not limited to: point, TRP), transmitting point (transmitting point, TP), the base station in the future mobile communication system or the access point in the WiFi system, etc. The access network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (DU) in a cloud radio access network (cloud radio access network, CRAN) scenario, or a network The device may be a relay station, a vehicle-mounted device, and a network device in a future evolved PLMN network, and the like.

CUs and DUs can be physically separate or deployed together. Multiple DUs can share one CU. A DU can also be connected to multiple CUs. The CU and the DU can be connected through an interface, such as an F1 interface. CU and DU can be divided according to the protocol layer of the wireless network. For example, one of the possible division methods is: CU is used to execute the radio resource control (radio resouce control, RRC) layer, the service data adaptation protocol (service data adaptation protocol, SDAP) layer and the packet data convergence layer protocol (packet data convergence layer protocol). Protocol, PDCP) layer function, and DU is used to perform radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer, physical (physical) layer and other functions. It can be understood that the division of CU and DU processing functions according to this protocol layer is only an example, and may also be divided in other ways. For example, a CU or DU may be divided into functions with more protocol layers. For example, a CU or DU can also be divided into partial processing functions with a protocol layer. In one design, some functions of the RLC layer and functions of the protocol layers above the RLC layer are placed in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are placed in the DU. In another design, the functions of the CU or DU may also be divided according to service types or other system requirements. For example, according to the delay, the functions whose processing time needs to meet the delay requirements are set in the DU, and the functions that do not need to meet the delay requirements are set in the CU. The network architecture shown in the figure above can be applied to a 5G communication system, which can also share one or more components or resources with an LTE system. In another design, the CU may also have one or more functions of the core network. One or more CUs can be set centrally or separately. For example, the CU can be set on the network side to facilitate centralized management. The DU can have multiple radio functions, or the radio functions can be set farther away.

The functions of the CU can be implemented by one entity or by different entities. For example, the functions of the CU can be further segmented, for example, the control plane (CP) and the user plane (user plane, UP) can be separated, that is, the CU control plane (CU-CP) and the CU user plane (CU -UP). For example, the CU-CP and the CU-UP may be implemented by different functional entities, and the CU-CP and the CU-UP may be coupled with the DU to jointly complete the functions of the access network device.

Terminal equipment can communicate with access network equipment of different technologies. For example, terminal equipment can communicate with access network equipment that supports long term evolution (LTE), and can also communicate with access network equipment that supports 5G. It can communicate with LTE-enabled access network devices and 5G-enabled access network devices at the same time. The embodiments of the present application are not limited.

In order to facilitate the understanding of the present application, the related concepts involved in the embodiments of the present application are now described.

1. User plane data processing

Fig. 2 takes the 5G system as an example, and shows the protocol stack of the user plane and the association relationship of each protocol layer entity. The protocol stack includes SDAP layer, PDCP layer, RLC layer, MAC layer and physical layer from top to bottom. Among them, the SDAP layer completes the mapping of quality of service (quality of service, QoS) flows to radio bearers. The PDCP layer completes functions such as data encryption, integrity protection and header compression on the user plane and control plane. The RLC layer completes functions such as size matching of data packets. The MAC layer completes functions such as data scheduling and mapping between logical channels and transport channels. One or more QoS flows are mapped to a radio bearer. A network device can configure multiple radio bearers for a terminal device. One radio bearer corresponds to one PDCP entity, one RLC entity, and one logical channel identity (LCID).

For the sender, the processing flow of the protocol stack is: at the SDAP layer, map the data packet to a radio bearer according to the QoS flow of the data packet, generate an SDAP protocol data unit (PDU), and send the SDAP PDU To the PDCP layer corresponding to the PDCP entity of the radio bearer. At the PDCP layer, the data packet is encrypted by the corresponding PDCP entity to generate a PDCP PDU, and then sent to the RLC entity corresponding to the radio bearer. At the RLC layer, after the PDCP PDU is segmented, an RLC PDU is generated and sent to the MAC entity. For the MAC layer, the RLC PDU is a MAC service data unit (SDU), and the MAC layer multiplexes one or more MAC SDUs to form a MAC PDU. In this MAC PDU, each MAC SDU corresponds to The part of the MAC sub-PDU is called a MAC sub-PDU. The MAC sub-PDU includes a MAC sub-header and a MAC SDU. The MAC sub-header includes an LCID field. The LCID is the logical channel identifier of the radio bearer of the corresponding MAC SDU. sent to the physical layer. The physical layer encodes and modulates the MAC PDU and sends it to the opposite end through the wireless air interface.

For the receiver, the processing flow of the protocol stack is: the physical layer demodulates and decodes the signal received by the air interface. If the decoding fails, the received data is not delivered, and a negative acknowledgment (NACK) is fed back to the sender. , the retransmission is performed by the sender. If the decoding is successful, the decoded MAC PDU is submitted to the MAC layer. The MAC layer parses each MAC sub-PDU and the MAC sub-header and MAC SDU of each MAC sub-PDU, and determines the corresponding MAC PDU according to the LCID in each MAC sub-header. The corresponding MAC SDU is delivered to the RLC entity corresponding to the wireless bearer. The RLC entity removes the RLC header and then delivers it to the PDCP entity corresponding to the wireless bearer. The PDCP entity performs decryption and other operations and delivers it to the SDAP layer.

2. XR service transmission and network coding

The XR service has a high rate requirement, and the rate requirement is, for example, generally 100 megabits per second (million bits per second, Mbps)-150Mbps. The XR service also has a short delay requirement, and the one-way transmission delay requirement of the air interface is, for example, 5 milliseconds to 10 milliseconds. In order to meet the high-speed, low-latency, and high-reliability requirements of XR services, the performance of existing systems will be severely degraded. For example, on the basis of meeting the requirements of high speed, low delay, and high reliability, each cell system can only support a small number of XR users, which cannot meet the system user capacity requirements of future networks. In addition, due to the fluctuating characteristics of 5G wireless channels, the channel capacity fluctuates, which in turn leads to an increase in the packet error rate and delay of the XR service, which further leads to a series of problems such as freezes, blurry screens, and black borders in the XR service. affect the user experience. Simulation evaluation shows that when the channel capacity decreases, the experience performance of XR under the existing system will drop sharply, resulting in a sharp deterioration of user experience.

In order to meet the high-speed and low-latency requirements of XR services, overcome the impact of wireless channel fluctuations, and improve user experience, the cloud server source can perform layered encoding, such as the scalable video encoding defined by the H.264 standard. video coding, SVC) and the scalable extension of high efficiency video coding (HEVC) defined by the H.265 standard (scalability extension of HEVC, SHVC). SVC introduces the concepts of base layer (BL) and enhancement layer (EL) and continues to be used in SHVC. There is 1 base layer, and its data can solve the basic video picture content, but the frame rate/resolution/picture quality is low; there can be 1 or more enhancement layers, and its data is used to improve the frame rate/resolution/picture quality quality. The video frame data generated by the cloud server source is input to the source encoder, such as an SVC encoder, for source encoding. The input video frame data is divided into two channels, one enters the base layer encoder, and the other enters the enhancement layer encoder. The entire layered coding outputs two data streams, namely the base layer data stream and the enhancement layer data stream. Different quality of service (QoS) is allocated to different data flows through the user plane function (UPF) of the core network. For example, the basic layer data flow is configured with high latency and reliability requirements. QoS 1, configure QoS 2 with low latency and reliability requirements for the enhancement layer data flow, so that the base layer data flow is transmitted in QoS flow 1, and the enhancement layer data flow is transmitted in QoS Flow 2. In this way, the requirements for delay and reliability of the enhancement layer can be appropriately relaxed while satisfying the reliable transmission of the data stream of the base layer, so that the transmission system capacity of the XR service can be improved while satisfying its low delay characteristics. In the wireless air interface, considering the different QoS requirements of the base layer and the enhancement layer, usually the QoS Flows of the base layer and the enhancement layer are respectively mapped to different radio bearers for transmission.

For high-reliability services with strict delay requirements, such as the basic layer data stream transmission of XR services, it may not be possible to provide reliable transmission capability through retransmission on the access network side, because retransmission will increase the delay. At this time, additional coding can be performed on the physical layer through a network coding scheme. For example, network coding is introduced between the PDCP layer and the RLC layer, and additional redundancy protection can be added to the data at the upper layer by means of network coding. After adopting this mechanism, the data can continue to be submitted to the upper layer in the case of an error in the decoding of the physical layer, and the data that fails to be decoded at the physical layer can be corrected at the network coding layer, thus ensuring the reliable transmission of the data and satisfying the low time highly reliable transmission of extended services. Compared with the base layer data stream, the enhancement layer data stream can be added with less redundancy protection and network coding or no network coding, so as to provide unequal protection for the base layer data stream and the enhancement layer data stream according to QoS requirements. .

However, network coding will add a lot of redundancy and occupy more air interface resources, so network coding is not suitable for all services or QoS Flow. For example, some services being transmitted by the terminal equipment are suitable for using network coding, and another part of the services are not suitable for using network coding. A problem that needs to be solved is that the physical layer of the terminal device does not know which data needs to be delivered to the upper layer even if the decoding of the physical layer fails. If no distinction is made, as long as the decoding errors of the physical layer are submitted to the upper layer, all services of the terminal equipment must be corrected by using network coding. A large amount of redundancy occupies more air interface resources, causing waste of air interface resources. If error correction is not performed, it may cause the terminal device to regard wrong data as correct data, resulting in the failure of the transmission of the entire service. In addition, when the decoding of the physical layer fails, the MAC layer may not obtain the LCID, or obtain the wrong LCID, and cannot deliver the data to the RLC entity or deliver the data to the wrong RLC entity, resulting in transmission failure or error. Make full use of the error correction capabilities of network coding.

In view of this, the technical solutions of the embodiments of the present application are provided. The technical solutions provided by the embodiments of the present application are described below with reference to the accompanying drawings.

An embodiment of the present application provides a communication method. Please refer to FIG. 3 , which is a flowchart of the method. The method can be performed by two communication devices, such as access network equipment and terminal equipment. The access network equipment may be a base station or a communication device (eg, a chip, a chip system or a processor) capable of supporting the functions required by the base station to implement the method. The terminal equipment may be various forms of terminal equipment described above or a communication device (eg, a chip, a chip system or a processor) capable of supporting the functions required by the terminal equipment to implement the method. For the convenience of introduction, in the following introduction, the method is performed by the access network device and the terminal device as an example.

S310. The access network device sends first indication information to the terminal device, where the first indication information instructs the terminal device to deliver the data packet that fails to be decoded at the physical layer to the upper layer.

The access network device generates first indication information and sends the first indication information to the terminal device. Correspondingly, the terminal device receives the first indication information from the access network device. It can be understood that the upper layer here refers to the upper layer of the physical layer, for example, the MAC layer, the RLC layer, the PDCP layer or the network coding layer. For the convenience of description, the MAC layer is used as an example for description in this application, but it is not limited to the MAC layer, and the upper layer may also be, for example, an RLC layer, a PDCP layer, or a network coding layer.

After the terminal device enters the RRC connected state, the access network device may configure one or more radio bearers for the terminal device. Different radio bearers may correspond to different service qualities. For example, the basic layer of the VR service can correspond to a radio bearer, which is used to provide low-latency and high-reliability transmission. In order to satisfy the low latency and high reliability of the data of the base layer, the data of the base layer, or the data on the bearer corresponding to the base layer can be network coded, and the received data of the base layer can be decoded at the physical layer of the terminal device After failure, it can be handed over to the upper layer of the terminal device. Since the data that fails to be decoded at the physical layer can be corrected at the network coding layer, the increase in delay caused by retransmission can be eliminated. The enhancement layer of the VR service can correspond to another bearer, which is used to provide relatively relaxed low-latency, high-reliability, and high-speed transmission. The data of the enhancement layer, or the data on the bearer corresponding to the enhancement layer, may or may not adopt network coding. Other services, such as voice services, can correspond to the third bearer and do not use network coding. It should be noted that the description in this application takes the XR service as an example, but it is not limited to the XR service, and can also be applied to other services. In this application, the decoding failure at the physical layer may refer to the failure of the physical layer to perform a cyclic redundancy check (cyclic redundancy check, CRC) on the received data packet.

In a possible implementation manner 1, the access network device sends an RRC message, such as an RRC reconfiguration message, to the terminal device, where the RRC message includes the first indication information. The first indication information may be bearer-level indication information, that is, the first indication information specifically instructs the terminal device to deliver the data packets transmitted on a certain bearer and failed to be decoded at the physical layer to the MAC layer. In this embodiment, for the convenience of description, this bearer is referred to as the first bearer. The first indication information may include a bearer identifier of the first bearer. The access network device may decide for which bearers to generate the corresponding first indication information as needed. The access network device may generate corresponding first indication information for one or more bearers. For example, a terminal device is configured with 3 bearers, among which bearer 1 is used to transmit the data of the basic layer of the VR service, bearer 2 is used to transmit the data of the VR service enhancement layer, and bearer 3 is used to transmit other services , such as the bearer of voice service data, the access network device may generate first indication information for bearer 1, may generate first indication information for bearer 2, or may not generate the first indication information, and for bearer 3 will not generate the first indication information Instructions. By generating the first indication information at the bearer level, different processing can be performed for different bearers to meet the service transmission requirements.

In another possible implementation manner 2, the access network device sends downlink control information (DCI) to the terminal device. The DCI includes first indication information. The first indication information specifically instructs the terminal device to deliver the data packets scheduled by the DCI and failing to be decoded at the physical layer to the MAC layer. The first indication information can be carried by the content included in the DCI, for example, some bits in the DCI are used as the first indication information, or a field is defined in the DCI to be used as the first indication information, or in the definition One or more bits are allocated in this field as the first indication information. The first indication information can also be represented by a DCI format. For example, a certain type of DCI format can be considered as the first indication information. When the DCI in this DCI format is used to schedule data, the terminal device knows that the data packet scheduled by the DCI is in the When the physical layer decoding fails, the terminal device needs to deliver the data packet to the MAC layer. Therefore, the first indication information mentioned in this application may be explicit, for example, the DCI includes bits that carry the first indication information. The first indication information mentioned in this application may also be implicit, for example, the DCI format may be regarded as a kind of first indication information. By including the first indication information in the DCI, it is beneficial to more flexibly indicate which data packets are delivered to the upper layer after decoding failure.

S320. The access network device sends the first data packet to the terminal device.

Correspondingly, the terminal device receives the first data packet. The first data packet is transmitted on the first bearer.

When the access network device needs to send the first data packet to the terminal device, the access network device sends DCI to the terminal device through, for example, a physical downlink control channel (PDCCH). a DCI. The first DCI includes scheduling information for scheduling the first data packet. It can be understood that, corresponding to the second implementation manner of step S310, the first DCI may be the DCI in step S310. The access network device, for example, sends the first data packet on a physical downlink share channel (physical downlink share channel, PDSCH). The terminal device first receives the first DCI from the PDCCH, obtains scheduling information for the first data packet of the terminal device from the first DCI, and receives the first data packet carried on the PDSCH according to the scheduling information.

S330. When the decoding of the first data packet at the physical layer fails, the terminal device submits the first data packet to the MAC layer based on the first indication information.

When the decoding of the first data packet at the physical layer fails, the conventional practice is that the terminal device does not deliver the first data packet to the upper layer. In this embodiment, if the first data packet fails to be decoded at the physical layer, the terminal device determines whether the corresponding first indication information is received, and if the terminal device receives the corresponding first indication information, it submits the first data packet to MAC layer. If the terminal device does not receive the corresponding first indication information, the first data packet is not delivered.

Specifically, corresponding to the first implementation in step S310, the terminal device first obtains the identification information of the bearer of the first data packet (for details, please refer to the embodiment corresponding to FIG. 5 in this application), and then determines whether it has received the first data packet corresponding to the bearer. an instruction message. If the first indication information corresponding to the bearer of the data packet is received, the physical layer of the terminal device delivers the first data packet to the MAC layer. If the first indication information corresponding to the bearer of the data packet is not received, the physical layer of the terminal device does not deliver the first data packet. Corresponding to the second implementation in step S310, the terminal device determines whether the DCI for scheduling the first data packet, that is, the first DCI, includes the first indication information. If the first DCI includes the first indication information, the physical layer of the terminal device delivers the first data packet to the MAC layer, and if the first DCI does not include the first indication information, the first data packet is not delivered. It should be noted that, the first indication information mentioned here includes explicit first indication information or implicit first indication information, and reference may be made to the description related to step S310, and details are not repeated here.

In this application, the data packets successfully decoded at the physical layer will be handed over to the MAC layer, and the data packets that fail to be decoded at the physical layer may also be handed over to the MAC layer. Optionally, in this application, the MAC layer learns whether the data packet received from the physical layer is a successfully decoded data packet or a decoded failed data packet. As shown in Figure 4, in addition to submitting the data packet to the MAC layer, the physical layer can also submit the second indication information corresponding to the data packet to the MAC layer. The second indication information indicates that the data packet is successfully decoded at the physical layer or that the The decoding fails, so that the MAC layer can know whether the data packet received from the physical layer is a successfully decoded data packet or a decoded failed data packet.

In a possible implementation manner, when the data packet fails to be decoded at the physical layer, the physical layer not only submits the data packet to the MAC layer, but also submits second indication information corresponding to the data packet, and the second indication information indicates the data packet. The packet failed to decode at the physical layer. When the data packet is successfully decoded at the physical layer, the corresponding second indication information is not delivered. For the data packets without the corresponding second indication information, the MAC layer considers the data packets to be successfully decoded.

In another possible implementation manner, when the data packet is successfully decoded at the physical layer, in addition to submitting the data packet to the MAC layer, second indication information corresponding to the data packet is also submitted, and the second indication information indicates the data The packet was decoded successfully at the physical layer. When the data packet fails to be decoded at the physical layer, the corresponding second indication information is not delivered. For a data packet without the corresponding second indication information, the MAC layer considers it as a data packet that fails to be decoded.

In another possible implementation manner, regardless of whether the data packet is successfully decoded at the physical layer or fails to be decoded, in addition to submitting the data packet to the MAC layer, second indication information corresponding to the data packet is also submitted, and the second indication information indicates Whether the packet was decoded successfully or failed to decode. For example, when the second indication information indicates 1 or true, it indicates that the decoding is successful, and when it indicates 0 or false, it indicates that the decoding fails. Or, when the second indication information indicates 0 or false, it indicates that the decoding is successful, and when it indicates 1 or true, it indicates that the decoding fails.

Through the above method, the MAC layer or the upper layer can distinguish which data packets fail to be decoded at the physical layer and which data packets are successfully decoded at the physical layer, so that different processing can be performed to improve processing efficiency and reduce unnecessary processing Waste of resources. For example, an error correction operation is performed on a data packet that fails to be decoded, but no error correction operation is performed on a data packet that is successfully decoded. It should be noted that the above-mentioned method for the MAC layer to distinguish and learn the success or failure of data packet decoding may be used in combination with the embodiment corresponding to FIG. 3 (for example, the data packet in FIG. 4 may be the first data packet), or may be used as a A separate example is implemented. It should be noted that the above method can be applied to a terminal device, that is, the MAC layer of the terminal device distinguishes whether the data packet received from the physical layer of the terminal device is a successfully decoded data packet or a decoded failed data packet. The physical layer of the terminal device submits the second indication information to the MAC layer of the terminal device. When used as a separate embodiment, it can also be applied to access network devices, that is, in the scenario where the physical layer of the access network device needs to deliver the data packets that fail to be decoded at the physical layer to the MAC layer of the access network device, the connection The MAC layer of the network access device distinguishes whether the data packet received from the physical layer of the access network device is a successfully decoded data packet or a decoded failed data packet. The physical layer of the access network device submits the second indication information to the MAC layer of the access network device.

In this embodiment, the access network device sends the first indication information to the terminal device, where the first indication information indicates that the data packet that fails to be decoded at the physical layer is delivered to the MAC layer. When the data packet fails to be decoded at the physical layer, the terminal device submits the data packet to the MAC layer based on the first indication information. Configure which data packets are delivered to the MAC layer when the physical layer decoding fails through the access network device, and other data packets are not delivered when the decoding fails, which is conducive to the highly reliable transmission of low-latency services and reduces the use of all services by the terminal equipment. The waste of air interface resources caused by network coding for error correction.

After receiving the MAC PDU submitted by the physical layer of the terminal device, the MAC layer of the terminal device parses the MAC PDU and obtains the LCID, and delivers the data to the corresponding RLC entity according to the LCID. However, in some scenarios, decoding is performed at the physical layer. The wrong packet is delivered to the MAC layer, and the MAC layer may get a wrong LCID when parsing the packet as a MAC PDU. For example, there is a transmission error in the LCID cell in the MAC PDU, which causes the MAC layer to obtain an incorrect LCID, or other cells in the MAC PDU have a transmission error, resulting in a misplaced parsing, and an incorrect LCID is parsed. In this case, it may occur that the MAC layer delivers data to the wrong RLC entity, resulting in data transmission errors.

In addition, in the embodiment corresponding to FIG. 3, corresponding to the first implementation in step S310, that is, in the case where the first indication information is the indication information of the bearer level, when a data packet fails to be decoded at the physical layer, in step S330 , the terminal device (specifically, the physical layer of the terminal device) needs to determine whether it has received the first indication information corresponding to the bearer of the data packet that fails to decode at the physical layer, so as to decide whether to deliver the failed data packet to the MAC layer. If the first indication information corresponding to the bearer is received, the physical layer of the terminal device delivers the decoding failed data packet to the MAC layer. If the first indication information corresponding to the bearer is not received, the physical layer of the terminal device does not deliver the decoding failed data packet. This requires that the physical layer of the terminal device first needs to know which bearer the data packet that fails to decode belongs to. However, the physical layer of the end device does not know which bearer a packet belongs to.

In view of this, another embodiment of the present application provides a communication method. Please refer to FIG. 5 , which is a flowchart of the method. The method can be performed by two communication devices, such as access network equipment and terminal equipment. The access network equipment may be a base station or a communication device (eg, a chip, a chip system or a processor) capable of supporting the functions required by the base station to implement the method. The terminal equipment may be various forms of terminal equipment described above or a communication device (eg, a chip, a chip system or a processor) capable of supporting the functions required by the terminal equipment to implement the method. For ease of introduction, in the following introduction, the method is performed by the access network device and the terminal device as an example.

S510. The access network device sends the second DCI to the terminal device, where the second DCI is used to schedule the second data packet.

The access network device generates the second DCI and sends the second DCI to the terminal device. Correspondingly, the terminal device receives the second DCI.

In a possible implementation manner 1, the second DCI includes bearer identification information of the second data packet, and the bearer identification information may be a bearer identification or a bearer LCID.

In another possible implementation manner 2, the second DCI includes bearer identification information of the second data packet, and the bearer identification information may be a bearer LCID index or a bearer index. The bits occupied by the LCID index or the bearer index may be less than the bits occupied by the corresponding LCID or the corresponding bearer identification, thus saving the bit overhead of the second DCI. For example, the LCID occupies 5 bits, which can support the access network equipment to configure a maximum of 32 bearers for the terminal equipment. Considering that not all bearer data needs to carry identification information in DCI, the LCID index can occupy fewer bits, such as 2 bits, which saves 3 bits of signaling compared to directly using 5 bits to indicate LCID in DCI. overhead.

In yet another possible implementation manner 3, there is a corresponding relationship between the DCI format of the second DCI and the bearer identifier or LCID of the second data packet. For example, the access network device may configure a DCI format of a certain DCI to have a corresponding relationship with a certain bearer identifier or a certain LCID.

S520. The access network device sends the second data packet to the terminal device.

Correspondingly, the terminal device receives the second data packet.

It should be noted that the second DCI and the second data packet may be sent in the same transmission time unit, such as a time slot, or may be sent in different transmission time units. The data scheduled by the second DCI, that is, the second data packet, may be data belonging to the same bearer. Optionally, the second data packet includes a MAC PDU, and the MAC PDU, or the MAC sub-header of the MAC sub-PDU in the MAC PDU may not include the LCID, so as to save the overhead of the air interface. Either the MAC PDU, or the MAC sub-header of the MAC sub-PDU in the MAC PDU includes the LCID, but considering that the LCID may be wrong, after the terminal device submits the failed decoding packet to the MAC layer of the terminal device, the terminal The MAC layer of the device may ignore the LCID, and the ignore here may be that the MAC layer decodes the LCID, but does not use the LCID to determine the corresponding RLC entity, or the MAC layer does not decode the LCID.

S530. The terminal device acquires the bearer identification information of the second data packet based on the second DCI.

The physical layer of the terminal device may acquire identification information of the bearer of the second data packet based on the second DCI.

Corresponding to the first implementation of step S510, the physical layer of the terminal device may obtain the bearer identification information of the second data packet, that is, the bearer identification or the bearer LCID of the second data packet, from the content of the second DCI.

Corresponding to the second implementation of step S510, the physical layer of the terminal device can obtain the identification information of the bearer of the second data packet from the content of the second DCI, that is, the bearer index or LCID index of the bearer of the second data packet, based on the second data packet. The bearer index or LCID index of the data packet may further obtain the bearer identifier or LCID of the second data packet.

Corresponding to the third implementation of step S510, the physical layer of the terminal device can acquire the bearer identifier or LCID of the second data packet based on the DCI format of the second DCI.

In the above implementation manners 2 and 3, in order to obtain the bearer identifier or LCID of the second data packet based on the bearer index or LCID index of the second data packet, or to obtain the second data based on the DCI format of the second DCI The bearer identifier or LCID of the packet, the method shown in FIG. 5 further includes step S500:

S500. The terminal device obtains the corresponding relationship.

The terminal device acquires the corresponding relationship, for example, the corresponding relationship may be predefined by the protocol, or the corresponding relationship may be configured by the access network device. The corresponding relationship may include one or more corresponding relationships.

Corresponding to the second implementation manner of step S510, the corresponding relationship may include the corresponding relationship between the bearer index and the bearer identifier, or the corresponding relationship between the LCID index and the LCID. Optionally, the correspondence includes at least a correspondence between a bearer index and a bearer identifier of the second data packet, or the correspondence at least includes a correspondence between the LCID index of the second data packet and the LCID of the bearer. The terminal device (for example, the physical layer of the terminal device, or the MAC layer of the terminal device) is based on the correspondence (or the correspondence between the bearer index of the bearer of the second data packet and the bearer identifier) and the bearer of the bearer of the second data packet. The index obtains the bearer identifier of the bearer of the second data packet, or obtains the second data packet based on the corresponding relationship (or the corresponding relationship between the LCID index of the bearer of the second data packet and the LCID of the bearer) and the LCID index of the bearer of the second data packet. The LCID of the packet's bearer. Table 1 is an example of the correspondence including the correspondence between the LCID index and the LCID. Taking Table 1 as an example, if the LCID index obtained by the terminal device from the second DCI is 1, then according to the corresponding relationship, that is, Table 1, it is obtained that the LCID carried by the second data packet is 30.

Table 1

LCID索引(2比特)LCID index (2 bits)	LCID(5比特)LCID (5 bits)
11	3030
22	88

Corresponding to the third implementation of step S510, the corresponding relationship may include the corresponding relationship between the DCI format and the bearer, and specifically, may be the corresponding relationship between the DCI format and the bearer identifier or LCID. Optionally, the corresponding relationship includes at least the corresponding relationship between the DCI format of the second DCI and the bearer identifier or LCID. The terminal device (for example, the physical layer of the terminal device, or the MAC layer of the terminal device) can obtain or Said to determine the bearer identification information of the second data packet, such as bearer identification or LCID. Table 2 is an example of the correspondence including the correspondence between the DCI format and the LCID. Taking Table 2 as an example, if the terminal device obtains the DCI format of the second DCI as "DCI format X", then the terminal device obtains the LCID of the second data packet as 10 according to the corresponding relationship, ie, Table 2.

Table 2

DCI格式DCI format	LCIDLCID
DCI格式XDCI formatX	1010
DCI格式YDCI format Y	55

It should be noted that this embodiment may be implemented in combination with the embodiment corresponding to FIG. 3 , or may be implemented independently. When implemented in combination with the embodiment corresponding to FIG. 3 , the second DCI may be the same DCI as the first DCI, and the second data packet may be the same data packet as the first data packet. When this embodiment is implemented independently, the second DCI and the first DCI are different DCIs, and the second data packet and the first data packet are different data packets.

Optionally, with reference to the embodiment corresponding to FIG. 3 , corresponding to the first implementation in step S310 , after step S530 , the physical layer of the terminal device is in the second data packet, that is, the first data packet in the embodiment corresponding to FIG. 3 . , after the physical layer decoding fails, according to the bearer identifier or LCID of the bearer of the second data packet obtained in step S530, it is determined whether the corresponding first indication information is configured for the bearer, so as to determine whether the physical layer decoding fails after the physical layer decoding fails. The second data packet is delivered to the MAC layer of the end device.

Optionally, after step S530, in addition to submitting the second data packet to the MAC layer of the terminal device, the physical layer of the terminal device also submits the bearer identification information of the second data packet (for example, the bearer index, or the LCID index, or bearer identification, or LCID) or the DCI format of the second DCI to the MAC layer of the terminal device, so that the MAC layer of the terminal device can learn accordingly or the bearer information of the second data packet based on the corresponding relationship, such as the second data packet. Bearer LCID. When combined with the embodiment corresponding to FIG. 3 , based on the bearer information of the second data packet obtained by the MAC layer, the MAC layer of the terminal device can submit the parsed data of the second data packet to the RLC entity corresponding to the bearer information, thereby Eliminate transmission errors caused by incorrect LCIDs.

The apparatus for implementing the above method in the embodiments of the present application will be described below with reference to the accompanying drawings. Therefore, the above content can be used in subsequent embodiments, and repeated content will not be repeated.

FIG. 6 is a schematic block diagram of a communication apparatus 600 according to an embodiment of the present application. The communication apparatus 600 may correspondingly implement the functions or steps implemented by the first terminal device or the second terminal device in each of the foregoing method embodiments.

In some possible implementations, the communication apparatus may include one or more of a sending unit 610 , a receiving unit 620 and a processing unit 630 . Optionally, a storage unit may also be included, and the storage unit may be used to store instructions (codes or programs) and/or data. The sending unit 610, the receiving unit 620 and the processing unit 630 may be coupled with the storage unit, for example, the processing unit 630 may read instructions (codes or programs) and/or data in the storage unit to implement corresponding methods. The above-mentioned units may be set independently, or may be partially or fully integrated.

In some possible implementations, the communication apparatus 600 can correspondingly implement the behaviors and functions of the terminal device in the foregoing method embodiments. For example, the communication apparatus 600 may be a terminal device, or may be a component (eg, a chip or a circuit) applied in the terminal device. The sending unit 610 and the receiving unit 620 may be respectively configured to perform the sending or receiving operations performed by the terminal device in the foregoing method embodiments, such as S310 and S320 in the embodiment shown in FIG. 3 , or the embodiment shown in FIG. 5 . S500, S510, and S520 in , and/or other processes for supporting the techniques described herein. The processing unit 630 is configured to perform operations other than the transceiving operations performed by the terminal device in the above method embodiments, and/or other processes used to support the techniques described herein.

In some possible embodiments, the receiving unit 620 is configured to receive first indication information from the access network device, where the first indication information indicates that the data packets that fail to be decoded at the physical layer are delivered to the upper layer, and the upper layer may include the MAC layer and the RLC layer. , PDCP layer or network coding layer, the receiving unit 620 is further configured to receive the first data packet from the access network device.

The processing unit 630 is configured to deliver the first data packet to the upper layer based on the first indication information when the first data packet fails to be decoded at the physical layer.

In some possible embodiments, the receiving unit 620 is configured to receive the second DCI from the access network device, and the receiving unit 620 is further configured to receive the second data packet from the access network device, where the second data packet is the first DCI. Two DCI-scheduled packets.

The processing unit 630 is configured to acquire, at the physical layer, the identification information of the bearer of the second data packet based on the second DCI.

It should be understood that the processing unit 630 in this embodiment of the present application may be implemented by at least one processor or a processor-related circuit component, and the sending unit 610 and the receiving unit 620 may be implemented by a transceiver or a transceiver-related circuit component or a communication interface.

In some possible implementation manners, the communication apparatus 600 can correspondingly implement the behaviors and functions of the access network equipment in the foregoing method embodiments. For example, the communication apparatus 600 may be an access network device, or may be a component (eg, a chip or a circuit) applied in the access network device. The sending unit 610 and the receiving unit 620 may be respectively configured to perform the sending or receiving operations performed by the access network device in the foregoing method embodiments, for example, S310 and S320 in the embodiment shown in FIG. S500, S510, and S520 in embodiments, and/or other processes for supporting the techniques described herein. The processing unit 630 is configured to perform operations other than the transceiving operations performed by the access network device in the foregoing method embodiments, and/or other processes used to support the techniques described herein.

In some possible embodiments, the processing unit 630 is configured to generate the first indication information; the sending unit 610 is configured to send the first indication information to the terminal device, where the first indication information indicates to deliver the data packet that fails to be decoded at the physical layer to the upper layer, The upper layer may include a MAC layer, an RLC layer, a PDCP layer or a network coding layer.

In some possible embodiments, the processing unit 630 is configured to generate the second DCI; the sending unit 610 is configured to send the second DCI to the terminal device, where the second DCI includes the sending of identification information of the bearer of the data packet scheduled by the second DCI unit.

It should be understood that the sending unit 610 in this embodiment of the present application may be implemented by a transceiver or a circuit component related to the transceiver or a communication interface.

The storage unit in the above embodiment may be implemented by a memory.

As shown in FIG. 7 , in the communication apparatus 700 provided by this embodiment of the present application, the communication apparatus 700 may be an access network device, which can implement the functions of the access network device in the method provided by the embodiment of the present application, or the communication apparatus 700 may be is a terminal device, which can implement the functions of the terminal device in the methods provided in the embodiments of the present application; the communication apparatus 700 may also be a device capable of supporting the access network equipment to implement the corresponding functions in the methods provided in the embodiments of the present application, or a terminal device capable of supporting A device is an apparatus for implementing functions corresponding to the methods provided in the embodiments of the present application. Wherein, the communication apparatus 700 may be a chip system. In this embodiment of the present application, the chip system may be composed of chips, or may include chips and other discrete devices.

The communication apparatus 700 includes at least one processor 720, which is configured to implement or support the communication apparatus 700 to implement the functions of the access network device or the terminal device in the method provided in the embodiment of the present application. For details, refer to the detailed description in the method example, which is not repeated here.

Communication apparatus 700 may also include at least one memory 730 for storing program instructions and/or data. Memory 730 is coupled to processor 720 . The coupling in the embodiments of the present application refers to indirect coupling or communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information interaction between devices, units or modules. Processor 720 may cooperate with memory 730 . The processor 720 may execute program instructions and/or data stored in the memory 730 to cause the communication device 700 to implement the corresponding method. Optionally, at least one of the at least one memory may be included in the processor.

The communication apparatus 700 may also include a communication interface 710 for communicating with other devices through a transmission medium, so that the devices used in the communication apparatus 700 may communicate with other devices. Exemplarily, when the communication device is a terminal device, the other device is an access network device; or, when the communication device is an access network device, the other device is a terminal device. The processor 720 may utilize the communication interface 710 to send and receive data. The communication interface 710 may specifically be a transceiver. For example, the above-mentioned transmitting unit 610 and receiving unit 620 constitute the communication interface 710 .

The specific connection medium between the communication interface 710 , the processor 720 , and the memory 730 is not limited in the embodiments of the present application. Exemplarily, in the embodiment of the present application, the memory 730, the processor 720, and the communication interface 710 are connected through a bus 740 in FIG. 7, and the bus is represented by a thick line in FIG. 7. The connections between other components are only A schematic illustration is provided, but not limited. The bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 7, but it does not mean that there is only one bus or one type of bus.

In this embodiment of the present application, the processor 720 may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which can implement Alternatively, each method, step, and logic block diagram disclosed in the embodiments of the present application are executed. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

In this embodiment of the present application, the memory 730 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or a volatile memory (volatile memory), Such as random-access memory (random-access memory, RAM). Memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and/or data.

It should be noted that, the communication device in the above embodiment may be a terminal device or a circuit, and may also be a chip applied in the terminal device or other combined devices or components having the functions of the above-mentioned terminal device. When the communication device is a terminal device, the transceiver unit may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module may be a processor, such as a central processing unit (central processing unit, CPU). When the communication device is a component having the functions of the above terminal equipment, the transceiver unit may be a radio frequency unit, and the processing module may be a processor. When the communication device is a chip system, the transceiver unit may be an input and output interface of the chip system, and the processing module may be a processor of the chip system.

FIG. 8 shows a schematic structural diagram of a simplified communication device. For the convenience of understanding and illustration, in FIG. 8 , the communication apparatus takes an access network device as an example. The access network device may be applied to the system shown in FIG. 1 , and may be the network device in FIG. 1 , and performs the functions of the access network device in the foregoing method embodiments. The access network device 800 may include one or more radio frequency units 810, such as a remote radio unit (remote radio unit, RRU) or an active antenna unit (Active Antenna Unit, AAU) and one or more baseband units (baseband unit, BBU) ) (also known as digital unit, digital unit, DU) 820. The radio frequency unit 810 may be referred to as a communication module, optionally, the communication module may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 811 and a radio frequency module 812 . The radio frequency unit 810 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals to baseband signals. The BBU 820 is mainly used for baseband processing and control of access network equipment. The radio frequency unit 810 and the BBU 820 can be physically set together, or can be physically set apart, that is, a distributed access network device.

The BBU 820 is the control center of the access network equipment, and can also be called a processing module, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spread spectrum. For example, the BBU 820 (processing module) may be used to control the access network device to perform the operation procedures related to the access network device in the above method embodiments.

In an example, the BBU 820 may be composed of one or more boards, and the multiple boards may jointly support a radio access network (such as an LTE network or an NR network) of a single access standard, or may support different access standards respectively. The wireless access network (such as LTE network, NR network or other standard network). BBU 820 also includes memory 821 and processor 822. The memory 821 is used to store necessary instructions and data. The processor 822 is configured to control the access network device to perform necessary actions, for example, to control the access network device to perform the operation flow of the access network device in the foregoing method embodiments. Memory 821 and processor 822 may serve one or more single boards. That is to say, the memory and processor can be provided separately on each single board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits may also be provided on each single board.

An embodiment of the present application further provides a communication apparatus, where the communication apparatus may be a terminal device or a circuit. The communication apparatus may be configured to perform the actions performed by the terminal device in the foregoing method embodiments.

FIG. 9 shows a schematic structural diagram of a simplified terminal device. For the convenience of understanding and illustration, in FIG. 9 , the terminal device takes a mobile phone as an example. As shown in FIG. 9 , the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process communication protocols and communication data, control the vehicle-mounted unit, execute software programs, and process data of software programs. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal. Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of equipment may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. When data is sent to the device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 9 . In an actual device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device or the like. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.

In the embodiments of the present application, the antenna and the radio frequency circuit with a transceiver function may be regarded as the transceiver unit of the apparatus, and the processor with the processing function may be regarded as the processing unit of the apparatus. As shown in FIG. 9 , the apparatus includes a transceiver unit 910 and a processing unit 920 . The transceiver unit 910 may also be referred to as a transceiver, a transceiver, a transceiver, or the like. The processing unit 920 may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Optionally, the device for implementing the receiving function in the transceiver unit 910 may be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 910 may be regarded as a transmitting unit, that is, the transceiver unit 910 includes a receiving unit and a transmitting unit. The transceiver unit 910 may also sometimes be referred to as a transceiver, a transceiver, or a transceiver circuit or the like. The receiving unit may also sometimes be referred to as a receiver, receiver, or receiving circuit, or the like. The transmitting unit may also sometimes be referred to as a transmitter, a transmitter, or a transmitting circuit, or the like.

It should be understood that the transceiving unit 910 is configured to perform the sending and receiving operations on the terminal device side in the above method embodiments, and the processing unit 920 is configured to perform other operations on the terminal device in the above method embodiments except the transceiving operations.

When the communication device is a chip-type device or circuit, the device may include a transceiver unit and a processing unit. The transceiver unit may be an input/output circuit and/or a communication interface; the processing unit may be an integrated processor or microprocessor or integrated circuit.

The embodiment of the present application further provides a communication system, specifically, the communication system may include an access network device and a terminal device. Exemplarily, the communication system includes access network equipment and terminal equipment for implementing the above-mentioned functions related to FIG. 3 , or the communication system includes access network equipment and terminal equipment for implementing the above-mentioned functions related to FIG. 5 , or the communication The system includes an access network device and a terminal device for implementing the functions related to the embodiments in at least two of the above-mentioned FIGS. 3 , 4 or 5 .

Embodiments of the present application further provide a computer-readable storage medium, including instructions, which, when executed on a computer, cause the computer to execute the method performed by the terminal device or access network device in any one of FIG. 3 to FIG. 5 .

Embodiments of the present application also provide a computer program product, including instructions, which, when run on a computer, cause the computer to execute the method performed by the terminal device or access network device in any one of FIG. 3 to FIG. 5 .

An embodiment of the present application provides a chip system, where the chip system includes a processor, and may also include a memory, for implementing the functions of the access network device or the terminal device in the foregoing method. The chip system can be composed of chips, and can also include chips and other discrete devices.

It should be understood that the terms "system" and "network" in the embodiments of the present application may be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) of a, b or c may represent: a, b, c, a-b, a-c, b-c or a-b-c, wherein a, b, c may be single or multiple. And, unless stated to the contrary, the ordinal numbers such as the terms "first" and "second" in the description, claims and drawings of the present application are used to distinguish multiple objects, and are not used to limit multiple objects order, timing, priority, or importance. For example, the first message and the second message are only for distinguishing different messages, but do not indicate the difference in priority, sending order, or importance of the two kinds of messages. In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiments or designs described in the embodiments of the present application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner. "Based on" in the description, claims and drawings of the present application may also mean "based on, at least in part".

It should be understood that the processor mentioned in the embodiments of the present application may be a CPU, and may also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), ready-made Field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically programmable Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory may be random access memory (RAM), which acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synchlink DRAM, SLDRAM) ) and direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components, the memory (storage module) is integrated in the processor.

It should be noted that the memory described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that, in various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not be dealt with in the embodiments of the present application. implementation constitutes any limitation.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

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

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

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions described in accordance with the embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes an integration of one or more available media. The usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVD), or semiconductor media (e.g., Solid State Disk (SSD)), and the like.

The above are only specific implementations of the present application, but the protection scope of the embodiments of the present application is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes within the technical scope disclosed in the embodiments of the present application. Or alternatives, all should be covered within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be based on the protection scope of the claims.

Claims

A communication method, characterized in that the method comprises:

receiving first indication information from an access network device, where the first indication information indicates that a data packet that fails to be decoded at the physical layer is delivered to the medium access control MAC layer;

receiving a first data packet from the access network device, where the first data packet is transmitted on a first bearer;

When the decoding of the first data packet at the physical layer fails, the first data packet is delivered to the MAC layer based on the first indication information.
The method according to claim 1, wherein receiving the first indication information from the access network device comprises:

Receive a radio resource control RRC message from the access network device, the RRC message includes the first indication information, and the first indication information specifically indicates that the transmission on the first bearer is delivered and decoded at the physical layer Failed packets to the MAC layer.
The method according to claim 1, wherein receiving the first indication information from the access network device comprises:

Receive first downlink control information DCI from the access network device, where the first DCI includes the first indication information, and the first indication information specifically indicates that the first DCI scheduling is submitted and is at the physical layer The failed data packet is sent to the MAC layer, and the first data packet is the data packet scheduled by the first DCI.
The method according to any one of claims 1 to 3, wherein delivering the first data packet to the MAC layer comprises:

Submitting the first data packet and second indication information to the MAC layer, the second indication information indicating that the decoding of the first data packet at the physical layer fails.
The method according to any one of claims 1 to 4, wherein the method further comprises:

Obtain the identification information of the first bearer at the physical layer;

Submitting the first data packet to the MAC layer includes:

Submit the first data packet and the identification information to the MAC layer.
The method according to claims 1 to 4, wherein the method further comprises:

Obtain the identification information of the first bearer at the physical layer;

Delivering the first data packet to the MAC layer based on the first indication information includes:

The first data packet is delivered to the MAC layer based on the first indication information and the identification information.
A communication method, characterized in that the method comprises:

receiving second downlink control information DCI from the access network device;

receiving a second data packet from the access network device, where the second data packet is a data packet scheduled by the second DCI;

At the physical layer, the identification information of the bearer of the second data packet is obtained based on the second DCI;

Submit the second data packet and the identification information to the medium access control MAC layer.
The method of claim 7, wherein:

The second DCI includes the identification information.
The method according to claim 7, wherein acquiring the identification information of the bearer of the second data packet based on the second DCI comprises:

The identification information is acquired based on the DCI format of the second DCI, where there is a corresponding relationship between the DCI format of the second DCI and the identification information.
The method of claim 9, wherein:

The corresponding relationship is configured by the access network device.
The method according to any one of claims 7 to 10, wherein,

The identification information includes a bearer identification, or a logical channel identification LCID, or an LCID index, or a bearer index.
The method according to any one of claims 7 to 11, wherein,

The second data packet includes a MAC protocol data unit PDU, and the MAC PDU does not include an LCID.
The method according to any one of claims 7 to 11, wherein,

The second data packet includes a MAC protocol data unit PDU, and the MAC PDU includes an LCID, which is ignored at the MAC layer.
The method according to any one of claims 7 to 13, wherein delivering the second data packet and the identification information to the MAC layer comprises:

When the decoding of the second data packet at the physical layer fails, the second data packet and the identification information are delivered to the MAC layer.
A communication method, characterized in that the method comprises:

Generating first indication information, the first indication information indicating that the data packets that fail to be decoded at the physical layer are delivered to the medium access control MAC layer

Send the first indication information to the terminal device.
The method according to claim 15, wherein sending the first indication information to the terminal device comprises:

Send a radio resource control RRC message to the terminal device, the RRC message includes the first indication information, and the first indication information specifically indicates that the data packets transmitted on the first bearer and failed to be decoded at the physical layer are delivered to the terminal device. MAC layer.
The method according to claim 16, wherein sending the first indication information to the terminal device comprises:

Send first downlink control information DCI to the terminal device, where the first DCI includes the first indication information, and the first indication information specifically indicates that the first DCI scheduling is submitted and the decoding at the physical layer fails packet to the MAC layer.
A communication method, characterized in that the method comprises:

generating second downlink control information DCI, where the second DCI includes identification information of the bearer of the data packet scheduled by the second DCI,

The second DCI is sent to the terminal device.
The method of claim 18, wherein:

The identification information includes a bearer identification, or a logical channel identification LCID, or an LCID index, or a bearer index.
A communication device for performing the method as claimed in any one of claims 1 to 6, or for performing the method as claimed in any one of claims 7 to 14, or for performing the method as claimed in any one of claims 15 to 17 The method of any one of, or for carrying out the method of any one of claims 18 to 19.
A communication device, comprising at least one processor coupled to a memory;

the memory for storing program codes;

the processor, configured to execute the program code, so that the communication device executes the method according to any one of claims 1 to 6, or executes the method according to any one of claims 7 to 14, Or perform a method as claimed in any one of claims 15 to 17, or perform a method as claimed in any one of claims 18 to 19.
A communication system, characterized in that the communication system includes a communication device for executing the communication method according to any one of claims 1 to 6 and a communication device for executing the communication method according to any one of claims 15 to 17, or It includes a communication device that executes the communication method according to any one of claims 7 to 14 and a communication device that executes the communication method according to any one of claims 18 to 19 .
A computer-readable storage medium, characterized in that, the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer is made to execute the method described in any one of claims 1 to 6. The method described, or the method according to any one of claims 7 to 14 is performed, or the method according to any one of claims 15 to 17 is performed, or the method according to any one of claims 18 to 19 is performed. the method described.
A computer program product, characterized in that the computer program product includes instructions, which, when executed, cause the method according to any one of claims 1 to 6 to be implemented, or cause the method according to claim 7 to 14. The method according to any one of claims 15 to 17 is carried out, or the method according to any one of claims 15 to 17 is carried out, or the method according to any one of claims 18 to 19 is carried out.