WO2021134680A1

WO2021134680A1 - Data transmission method and apparatus

Info

Publication number: WO2021134680A1
Application number: PCT/CN2019/130917
Authority: WO
Inventors: 黄曲芳
Original assignee: 华为技术有限公司
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-07-08
Also published as: CN114902637A; CN114902637B

Abstract

The present application discloses a data transmission method and apparatus. Said method comprises: a communication apparatus receiving a first data packet; and if it is determined that the first data packet is transmitted incorrectly, performing incorrect delivery of the first data packet. By means of said method, by performing incorrect delivery of a data packet, the data packet that has been received by a receiving end device can be effectively utilized, satisfying transmission requirements of services.

Description

Data transmission method and device

Technical field

This application relates to the field of wireless communication technology, and in particular to a data transmission method and device.

Background technique

With the development of wireless communication networks, terminal equipment supports more and more diverse services. For example, terminal equipment can support more and more high-precision voice, high-definition video and other services. The amount of data in these services is very large. Delay requirements are relatively high.

However, how to perform data transmission to meet the transmission requirements of the above-mentioned services still needs further research.

Summary of the invention

In view of this, the present application provides a data transmission method and device to implement the wrong delivery of data packets, so as to effectively use the data packets already received by the receiving end device to meet the transmission requirements of the business.

In the first aspect, the embodiments of the present application provide a data transmission method, which can be applied to a communication device. In this method, the communication device receives a first data packet. The package execution error was submitted.

By adopting the above method, by performing error delivery of data packets, the data packets that have been received by the receiving end device can be effectively used to meet the transmission requirements of the business.

In a possible design, the communication device determining that the transmission of the first data packet is incorrect includes: the communication device determines that the CRC check of the first data packet fails; and/or the communication device determines that the decoding of the first data packet fails.

In a possible design, the communication device may be a network device or a chip set inside the network device.

In a possible design, the method further includes: the communication device sending first indication information, where the first indication information is used to indicate that the data carried by the first resource supports error delivery; wherein the first data packet is carried by the first resource.

In a possible design, the communication device sending the first indication information includes: the communication device sends an uplink grant, the uplink grant is used to indicate the first resource, and the uplink grant carries the first indication information; or the communication device sends the first configuration information , The first configuration information is used to configure the first resource, and the first configuration information carries the first indication information; or, the communication device sends control information, the control information is used to activate the first resource, and the control information carries the first indication information.

With this implementation method, the network device can determine whether the transmission supports error delivery by indicating whether the data carried by the first resource supports error delivery, thereby increasing the flexibility of network device control.

In a possible design, the method further includes: the communication device receives second indication information, where the second indication information is used to indicate that the first data packet supports error delivery.

In this way, the terminal device can indicate to the network device that the first data packet supports error delivery, that is, the terminal device can determine whether the transmission supports error delivery, so that the network device does not need to indicate the data carried by the resource when allocating resources. Whether to support wrong submission, reduce the processing burden of network equipment.

In a possible design, the first data packet and the second indication information are carried in the first resource allocated by the communication device.

In this way, both the first data packet and the second indication information are carried on the first resource, so that no additional resources are needed to send the second indication information, which can effectively save transmission resources.

In a possible design, the communication device may be a terminal device or a chip set inside the terminal device.

In a possible design, the first data packet is carried on the second resource; the method further includes: the communication device receives third indication information, and the third indication information is used to indicate that the data carried by the second resource supports error delivery.

In a possible design, the communication device receiving the third indication information includes: the communication device receives the first control information, the first control information is used to schedule the second resource, and the first control information carries the third indication information; or The device receives the second control information, the second control information is used to activate the second resource, and the second control information carries the third indication information; or, the communication device receives the second configuration information, and the second configuration information is used to configure the second resource. The second configuration information carries third instruction information.

In a possible design, the first data packet is carried on the second resource; the method further includes: the communication device receives third control information according to a preset control resource set and/or a preset search space, and the third control information is used for The second resource is scheduled; the data carried by the resource scheduled by the preset control resource set and/or the third control information carried by the preset search space supports error delivery; or the communication device receives the third control information on the physical downlink control channel, The third control information is used for scheduling the second resource; the physical downlink control channel is scrambled by a preset RNTI, and the preset RNTI indicates that the data carried by the resource scheduled by the third control information carried by the physical downlink control channel supports error delivery.

In this way, an implicit way is used to indicate that the data carried by the second resource supports erroneous delivery, so there is no need to transmit the indication information through additional resources, which can effectively save transmission resources.

In a possible design, the method further includes: the communication device receives third configuration information, and the third configuration information is used to configure the error delivery function for the communication device.

In a possible design, the communication device performs error delivery of the first data packet, including: the HARQ entity of the communication device delivers the first data packet and fourth indication information to the demultiplexing entity, and the fourth indication information is used to indicate Transmission error of the first data packet.

In a possible design, the fourth indication information is used to indicate the decoding accuracy of the first data packet.

In this way, by indicating the correct rate of decoding of the first data packet, the upper layer can more clearly understand the decoding situation of the first data packet, so as to perform corresponding operations according to the decoding situation of the first data packet.

In a possible design, before the HARQ entity of the communication device submits the first data packet and the fourth indication information to the demultiplexing entity, it further includes at least one of the following: the HARQ entity of the communication device determines the translation of the first data packet The code accuracy rate is greater than the first threshold; the HARQ entity of the communication device determines that the number of retransmissions of the first data packet is greater than the second threshold; the HARQ entity of the communication device determines that the timer corresponding to the first data packet has expired.

In a possible design, the method further includes: if the HARQ entity of the communication device receives the retransmitted data packet of the first data packet, submitting the retransmitted data packet to the demultiplexing entity; further, the first data packet It can be a new data packet.

In a possible design, before the HARQ entity of the communication device submits the retransmission data packet to the demultiplexing entity, it further includes: the HARQ entity of the communication device determines that the transmission of the retransmission data packet is correct.

In a possible design, the method further includes: the HARQ entity of the communication device responds with an ACK for the first data packet feedback confirmation.

In a possible design, the communication device performs error delivery of the first data packet, including: the demultiplexing entity of the communication device delivers the first data packet and the fifth instruction information to the RLC layer entity, and the fifth instruction information is used for Indicates the transmission error of the first data packet.

In a possible design, before the demultiplexing entity of the communication device submits the first data packet to the RLC layer entity, it further includes at least one of the following: the demultiplexing entity of the communication device parses the logic from the first data packet Channel identification; the demultiplexing entity of the communication device parses the first data packet to obtain the logical channel identification, and the logical channels corresponding to the logical channel identification support error delivery; the demultiplexing entity of the communication device determines that it has not submitted to the RLC layer entity The first data packet is passed; the demultiplexing entity of the communication device determines that the decoding accuracy rate of the first data packet is greater than the third threshold.

In a possible design, the method further includes: if the demultiplexing entity of the communication device determines that the MAC CE is included in the first data packet, applying the MAC CE.

In a possible design, before the demultiplexing entity of the communication device performs the behavior indicated by the MAC CE, it further includes at least one of the following: the demultiplexing entity of the communication device parses the first data packet to obtain a logical channel identifier; communication; The demultiplexing entity of the device determines that the first data packet is received for the first time; the demultiplexing entity of the communication device determines that the decoding accuracy of the first data packet is greater than the fourth threshold.

In a possible design, the method further includes: if the RLC layer entity of the communication device determines that the first data packet is received for the first time, moving the window of the RLC SN. Similarly, if the PDCP layer entity of the communication device determines that the first data packet is received for the first time, it moves the window of the PDCP SN.

Using the above method, when the first data packet is received for the first time, the windows of RLC SN and PDCP SN are moved. If the first data packet is not received for the first time, the windows of RLC SN and PDCP SN can not be moved any more, so as to avoid targeting the same The data packet moved the window multiple times and caused an error.

In the second aspect, the embodiments of the present application provide a data transmission method, which can be applied to a communication device. In this method, the communication device constructs a first data packet and sends the first data packet; the first data packet supports error delivery .

With the above method, since the first data packet supports error delivery, the receiving end device can perform error delivery on the first data packet after receiving the first data packet, so as to effectively use the data packets already received by the receiving end device to satisfy The transmission requirements of the business.

In a possible design, the first data packet supports erroneous delivery, including at least one of the following: the service to which the first data packet belongs supports erroneous delivery; the cell that transmits the first data packet supports erroneous delivery; the first data packet includes For data from at least one logical channel, part or all of the at least one logical channel supports error delivery.

In a possible design, the method further includes: the communication device receives first indication information, the first indication information is used to indicate that the first resource supports error delivery; the communication device sends the first data packet, including: the communication device is in the first The first data packet is sent on the resource.

In a possible design, the communication device receiving the first indication information includes: the communication device receives the uplink grant, the uplink grant is used to indicate the first resource, and the uplink grant carries the first indication information; or, the communication device receives the first configuration information , The first configuration information is used to configure the first resource, and the first configuration information carries the first indication information; or, the communication device receives the control information, the control information is used to activate the first resource, and the control information carries the first indication information.

In a possible design, the method further includes: the communication device sends second indication information, where the second indication information is used to indicate that the first data packet supports error delivery.

In this way, after the terminal device constructs a data packet, if it is determined that the constructed data packet supports error delivery, it can indicate to the network device that the data packet supports error delivery, that is, the terminal device can determine whether the transmission supports error delivery. Therefore, when the network device allocates resources, there is no need to indicate whether the data carried by the resource supports error delivery, which reduces the processing burden of the network device.

In a possible design, the second indication information is used to indicate that the first data packet supports error delivery when the first data packet meets at least one of the following: the decoding accuracy rate of the first data packet is greater than the first threshold; The number of retransmissions of a data packet is greater than the second threshold; the timer corresponding to the first data packet expires.

In a possible design, the communication device sending the first data packet and the second indication information includes: the communication device sending the first data packet and the second indication information on the first resource.

In a possible design, the communication device sending the first data packet and the second indication information on the first resource includes: the communication device punctures the first data packet, and sends the punctured data packet on the first resource The first data packet and the second indication information; or, the communication device performs joint coding on the first data packet and the second indication information, and sends the joint coded information on the first resource.

In a possible design, the method further includes: the communication device receives second configuration information, where the second configuration information is used to indicate whether one or more logical channels support error delivery.

In a possible design, the first data packet is carried on the second resource; the method further includes: the communication device sends third indication information, and the third indication information is used to indicate that the second resource supports error delivery.

In a possible design, the communication device is a DU, and the method further includes: receiving fourth indication information from the CU, where the fourth indication information is used to indicate whether one or more logical channels support error delivery.

In a possible design, the communication device sending the first data packet includes: the MAC layer entity of the communication device submits the first data packet and the fifth indication information to the physical layer entity, and the fifth indication information is used to indicate the first data The position of at least one of the SDAP header, PDCP header, RLC header, and MAC header of the packet in the first data packet; the physical layer entity of the communication device sends the first data packet according to the fifth indication information.

In this way, the MAC layer informs the physical layer of the positions of the SDAP header, PDCP header, RLC header, and MAC header in the first data packet, that is, which bits in the first data packet are more important, so as to facilitate the physical layer to transmit the first data packet At this time, priority is given to ensuring the successful transmission of the bits at the location of the SDAP header, PDCP header, RLC header, and MAC header.

In a possible design, the first data packet includes one PDCP SDU or one PDCP SDU fragment.

In this way, after receiving the first data packet submitted by the MAC layer, the physical layer can learn the position of the SDAP header, PDCP header, RLC header, and MAC header in the first data packet (such as SDAP header, PDCP header, RLC) Header and MAC header are distributed in the front part of the first data packet), and then when transmitting the first data packet, priority is given to ensuring the successful transmission of the bits at the location of the SDAP header, PDCP header, RLC header, and MAC header. The bits can be transmitted correctly.

In a third aspect, an embodiment of the present application provides a communication system, which includes a network device and a core network device; wherein the network device is used to execute the method described in some possible designs in the first aspect or the second aspect. .

In a possible design, the core network device is used to send service information of one or more services to the network device; wherein, one or more services include the first service, and the service information of the first service includes at least one of the following Item: Delay budget of the first service; error delivery instruction of the first service, the error delivery instruction of the first service is used to indicate whether the first service supports error delivery; one or more data streams corresponding to the first service The error delivery instruction of the data stream is used to indicate whether the data stream supports error delivery.

In a fourth aspect, the present application provides a communication device. The communication device may be a terminal device (or a chip set inside the terminal device) or a network device (or a chip set inside the network device). The communication device has the function of implementing the first aspect or the second aspect. For example, the communication device includes a module or unit or means corresponding to the steps involved in the first or second aspect. The function Or the unit or means can be realized by software, or by hardware, and can also be realized by hardware executing corresponding software.

In a possible design, the communication device includes a processing unit and a communication unit, where the communication unit can be used to send and receive signals to achieve communication between the communication device and other devices; the processing unit can be used to perform the communication Some internal operations of the device. The functions performed by the processing unit and the communication unit may correspond to the steps involved in the first aspect or the second aspect described above.

In a possible design, the communication device includes a processor, and may also include a transceiver. The transceiver is used to send and receive signals, and the processor executes program instructions to complete any of the above-mentioned first or second aspects. Possible design or method of implementation. Wherein, the communication device may further include one or more memories, and the memories are used for coupling with the processor. The one or more memories may be integrated with the processor, or may be provided separately from the processor, which is not limited in this application. The memory may store necessary computer programs or instructions for realizing the functions related to the first aspect or the second aspect. The processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes any of the possible designs or implementations of the first aspect or the second aspect. method.

In a possible design, the communication device includes a processor and a memory, and the memory can store necessary computer programs or instructions for realizing the functions related to the first aspect or the second aspect. The processor can execute the computer program or instruction stored in the memory, and when the computer program or instruction is executed, the communication device realizes any of the possible designs or implementations of the first aspect or the second aspect. method.

In a possible design, the communication device includes at least one processor and an interface circuit, where at least one processor is used to communicate with other devices through the interface circuit, and execute any possibility of the first aspect or the second aspect. The method in the design or implementation.

In a fifth aspect, this application provides a computer-readable storage medium that stores computer-readable instructions. When the computer reads and executes the computer-readable instructions, the computer executes the first aspect or Any possible design method of the second aspect.

In a sixth aspect, this application provides a computer program product, which when a computer reads and executes the computer program product, causes the computer to execute any one of the possible design methods of the first aspect or the second aspect.

In a seventh aspect, the present application provides a chip that includes a processor, and the processor is coupled with a memory, and is configured to read and execute a software program stored in the memory to implement the above-mentioned first aspect or second aspect. Any one of the possible design methods.

These and other aspects of the application will be more concise and understandable in the description of the following embodiments.

Description of the drawings

FIG. 1a is a schematic diagram of a possible system architecture to which an embodiment of this application is applicable;

FIG. 1b is a schematic diagram of another network architecture to which the embodiments of this application are applicable;

FIG. 1c is a schematic diagram of another network architecture to which an embodiment of this application is applicable;

2a is a schematic diagram of downlink data transmission between various layers provided by an embodiment of this application;

FIG. 2b is a schematic diagram of data transmission between a sending end device and a receiving end device according to an embodiment of the application;

FIG. 2c is a schematic diagram of the decoding and HARQ feedback flow of the receiving end device according to an embodiment of the application;

FIG. 3 is a schematic diagram of a flow corresponding to the data transmission method provided in the first embodiment of the application; FIG.

FIG. 4 is a schematic diagram of incorrect submission of HARQ entities provided by an embodiment of the application;

FIG. 5 is a schematic diagram of a process corresponding to the data transmission method provided in the second embodiment of the application; FIG.

FIG. 6 is a possible exemplary block diagram of a device involved in an embodiment of this application;

FIG. 7 is a schematic structural diagram of a terminal device provided by an embodiment of this application;

FIG. 8 is a schematic structural diagram of a network device provided by an embodiment of this application;

FIG. 9 is a schematic structural diagram of another network device provided by an embodiment of this application.

Detailed ways

The following describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

First, some terms in the embodiments of the present application are explained to facilitate the understanding of those skilled in the art.

(1) Terminal device: It can be a wireless terminal device that can receive network device scheduling and instruction information. A wireless terminal device can be a device that provides voice and/or data connectivity to users, or a handheld device with wireless connection function, or Other processing equipment connected to the wireless modem. A terminal device can communicate with one or more core networks or the Internet via a radio access network (e.g., radio access network, RAN). The terminal device can be a mobile terminal device, such as a mobile phone (or called a "cellular" phone, mobile phone). (mobile phone)), computers and data cards, for example, can be portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile devices, which exchange language and/or data with the wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and tablets Computers (Pad), computers with wireless transceiver functions and other equipment. Wireless terminal equipment can also be called system, subscriber unit, subscriber station, mobile station, mobile station (MS), remote station (remote station), access point ( access point (AP), remote terminal equipment (remote terminal), access terminal equipment (access terminal), user terminal equipment (user terminal), user agent (user agent), subscriber station (SS), user terminal equipment (customer premises equipment, CPE), terminal (terminal), user equipment (user equipment, UE), mobile terminal (mobile terminal, MT), etc. The terminal device may also be a wearable device and a next-generation communication system, for example, a terminal device in a 5G communication system or a terminal device in a public land mobile network (PLMN) that will evolve in the future.

(2) Network equipment: It can be a device in a wireless network. For example, a network device can be a radio access network (RAN) node (or device) that connects a terminal to the wireless network, and can also be called a base station. At present, some examples of RAN equipment are: new generation Node B (gNodeB), transmission reception point (TRP), evolved Node B (evolved Node B, eNB), wireless network in 5G communication system Controller (radio network controller, RNC), node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB), Or home Node B, HNB, baseband unit (BBU), wireless fidelity (Wi-Fi) access point (AP), roadside unit (RSU), The access point in the integrated access and backhaul (IAB) system, the control node and the terminal node in the TSN network, etc. In addition, in a network structure, the network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node. In addition, in other possible situations, the network device may be another device that provides wireless communication functions for the terminal device. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device. For ease of description, in the embodiments of the present application, a device that provides a wireless communication function for a terminal device is referred to as a network device.

(3) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: the existence of A alone, both A and B, and B alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, "at least one of A, B, and C" includes A, B, C, AB, AC, BC, or ABC.

And, unless otherwise specified, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or importance of multiple objects. degree. For example, the first terminal device and the second terminal device are only used to distinguish different terminal devices, but do not indicate the difference in priority or importance of the two terminal devices.

Figure 1a is a schematic diagram of a network architecture to which an embodiment of this application is applicable. As shown in FIG. 1a, the terminal device 130 can access a wireless network to obtain services from an external network (such as the Internet) through the wireless network, or communicate with other devices through the wireless network, for example, it can communicate with other terminal devices. The wireless network includes a radio access network (RAN) device 110 and a core network (core network, CN) device 120. The RAN device 110 is used to connect the terminal device 130 to the wireless network, and the CN device 120 is used to Manage terminal equipment and provide a gateway for communication with the external network. It should be understood that the number of devices in the communication system shown in FIG. 1a is only for illustration, and the embodiments of the present application are not limited to this. In actual applications, the communication system may also include more terminal devices 130 and more RAN devices. 110, may also include other devices.

The CN may include multiple CN devices 120. When the network architecture shown in Figure 1a is applicable to a 5G communication system, the CN device 120 may be an access and mobility management function (AMF) entity, session management A function (session management function, SMF) entity or a user plane function (UPF) entity, etc., in the embodiment of the present application, the CN device 120 is an UPF entity as an example. Exemplarily, the interface between the terminal device 130 and the RAN device 110 may be called a Uu interface or an air interface, and the interface between the RAN device 110 and the UPF entity may be called an N3 interface.

FIG. 1b is a schematic diagram of another network architecture to which an embodiment of this application is applicable. As shown in Figure 1b, the network architecture includes CN equipment, RAN equipment, and terminal equipment. Among them, the RAN equipment includes a baseband device and a radio frequency device. The baseband device can be implemented by one node or by multiple nodes. The radio frequency device can be implemented remotely from the baseband device, or integrated in the baseband device, or partially pulled. The remote part is integrated in the baseband device. For example, in an LTE communication system, the RAN equipment (eNB) includes a baseband device and a radio frequency device, where the radio frequency device can be arranged remotely relative to the baseband device, such as a remote radio unit (RRU) arranged remotely relative to the BBU . For another example, in an evolution structure, a RAN device may include a CU and a DU, multiple DUs may be centrally controlled by one CU, and the interface between the CU and the DU may be called an F1-U interface.

FIG. 1c is a schematic diagram of another network architecture to which an embodiment of this application is applicable. Compared with the network architecture shown in Figure 1b, in Figure 1c, the control plane (CP) and the user plane (UP) of the CU can also be separated and implemented by dividing them into different entities, which are respectively the control plane (CP) CU entity ( That is, the CU-CP entity) and the user plane (UP) CU entity (ie, the CU-UP entity).

In the above network architecture, the signaling generated by the CU can be sent to the terminal device through the DU, or the signaling generated by the terminal device can be sent to the CU through the DU. The DU may directly pass the protocol layer encapsulation without analyzing the signaling and transparently transmit it to the terminal device or the CU. In the following embodiments, if the transmission of such signaling between the DU and the terminal device is involved, at this time, the sending or receiving of the signaling by the DU includes this scenario. For example, the radio resource control (RRC) layer or the packet data convergence protocol (packet data convergence protocol, PDCP) layer signaling will eventually be processed as physical layer signaling and sent to the terminal device, or received The signaling of the physical layer is transformed. In this architecture, the RRC or PDCP layer signaling can also be considered to be sent by the DU, or sent by the DU and radio frequency load.

The network architecture shown in Figure 1a, Figure 1b, or Figure 1c can be applied to various radio access technology (RAT) communication systems, such as 5G (or called new radio (NR)). )) The communication system, of course, can also be a future communication system. The network architecture and business scenarios described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. Those of ordinary skill in the art will know that with communication With the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

The devices in the following embodiments of the present application may be located in terminal equipment or network equipment according to their realized functions. When the above CU-DU structure is adopted, the network device may be a CU, or DU, or a RAN device including CU and DU.

In the network architecture shown in Figure 1a, Figure 1b, or Figure 1c, the communication between the network device and the terminal device can follow a certain protocol layer structure. For example, the control plane protocol layer structure can include the RRC layer, the PDCP layer, and the wireless link. Functions of protocol layers such as radio link control (RLC) layer, media access control (MAC) layer, and physical layer (PHY); user plane protocol layer structure can include PDCP layer and RLC layer , MAC layer, physical layer and other protocol layer functions; in a possible implementation, the PDCP layer may also include a service data adaptation protocol (SDAP) layer. Exemplarily, a network device may implement the functions of protocol layers such as RRC, PDCP, RLC, and MAC by one node, or may implement the functions of these protocol layers by multiple nodes. For example, if the network equipment includes CU and DU, CU and DU can be divided according to the protocol layer of the wireless network. For example, the functions of the PDCP layer and the above protocol layers are set in the CU, and the protocol layers below PDCP, such as the RLC layer and the MAC layer, etc. The function is set in DU. This type of protocol layer division is just an example, it can also be divided in other protocol layers, for example, in the RLC layer, the functions of the RLC layer and above protocol layers are set in the CU, and the functions of the protocol layers below the RLC layer are set in the DU; Or, in a certain protocol layer, for example, part of the functions of the RLC layer and the functions of the protocol layer above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layer below the RLC layer are set in the DU. In addition, it can also be divided in other ways, for example, by time delay. The functions that need to meet the time delay requirements for processing time are set in the DU, and the functions that do not need to meet the delay requirements are set in the CU.

Take the data transmission between network equipment and terminal equipment as an example. Data transmission needs to go through the user plane protocol layer, such as through the SDAP layer, PDCP layer, RLC layer, MAC layer, and physical layer. Among them, the SDAP layer, PDCP layer, RLC layer The MAC layer and the physical layer can also be collectively referred to as the access layer. According to the data transmission direction, it is divided into sending or receiving, and each layer mentioned above is divided into sending part and receiving part. The following data transmission is taken as an example. Figure 2a shows a schematic diagram of downlink data transmission between layers. In Figure 2a, the downward arrow indicates data transmission, and the upward arrow indicates data reception. After the PDCP layer obtains data from the upper layer, it transmits the data to the RLC layer and the MAC layer, and then the MAC layer generates a transport block (TB), and then performs wireless transmission through the physical layer. Data is encapsulated correspondingly in each layer. The data received by a certain layer from the upper layer of the layer is regarded as the service data unit (SDU) of the layer, and after layer encapsulation, it becomes a PDU, and then is passed to the lower layer. One layer. For example, the data received by the PDCP layer from the upper layer is called PDCP SDU, the data sent by the PDCP layer to the lower layer is called PDCP PDU; the data received by the RLC layer from the upper layer is called RLC SDU, and the data sent by the RLC layer to the lower layer is called RLC PDU. ; The data received by the MAC layer from the upper layer is called MAC SDU, the data sent by the MAC layer to the lower layer is called MAC PDU, and MAC PDU can also be called a transport block. In the protocol, the connections between layers are mostly corresponded in the way of channels. The RLC layer and the MAC layer correspond to each other through a logical channel (LCH), and the MAC layer and the physical layer correspond to each other through a transport channel. Below the physical layer is a physical channel, which is used to correspond to the other end. The physical layer.

Exemplarily, according to Figure 2a, it can also be seen that the terminal device also has an application layer and a non-access layer; where the application layer can be used to provide services to applications installed in the terminal device, for example, the terminal device receives Downlink data can be sequentially transmitted from the physical layer to the application layer, and then provided to the application by the application layer; for example, the application layer can obtain data generated by the application (such as the video recorded by the user using the application, etc.), and transmit the data in turn To the physical layer, send to other communication devices. The non-access layer can be used to forward user data, such as forwarding uplink data received from the application layer to the SDAP layer or forwarding downlink data received from the SDAP layer to the application layer.

As shown in FIG. 2b, the MAC layer may include one or more sub-function entities or modules, such as multiplexing or demultiplexing entities, hybrid automatic repeat request (HARQ) entities, encoding or decoding entities. The physical layer may also include one or more sub-functional entities or modules, such as a cyclic redundancy check (cyclic redundancy check, CRC) check module. The above sub-function entities or modules will be introduced from the perspectives of the sending end device and the receiving end device respectively. Among them, the sending end device may be a terminal device, and the receiving end device may be a network device; or, the sending end device may be a network device, and the receiving end device may be a terminal device.

For the sender device, the MAC layer may include multiplexing entities, HARQ entities, and coding entities. Among them, the multiplexing entity can be used to multiplex the RLC PDU received from the RLC layer to obtain the MAC PDU, and submit it to the HARQ entity; one RLC layer entity corresponds to one logical channel, and the RLC PDU can also be called MAC SDU. There can be multiple ways of multiplexing, such as segmentation and cascading. For example, the multiplexing entity can segment the RLC PDU received from logical channel 1, for example, into two RLC PDU segments, RLC PDU segment 1 and RLC PDU segment 2, and then according to RLC PDU segment 1. Obtain MAC PDU1, and obtain MAC PDU2 according to RLC PDU fragment 2. For another example, the multiplexing entity can concatenate RLC PDU1 received from logical channel 1 and RLC PDU2 received from logical channel 2, and then obtain a MAC PDU according to the concatenated RLC PDU1 and RLC PDU2; different The RLC PDU of the logical channel can be distinguished by the logical channel identifier (LCH ID) in the MAC PDU header. It should be noted that, in Figure 2b, the multiplexing mode is cascaded as an example for illustration. Further, the HARQ entity may submit the MAC PDU received from the multiplexing entity to the encoding entity, and then the encoding entity may perform encoding, and then transmit the encoded MAC PDU to the physical layer. Furthermore, the CRC check module in the physical layer performs CRC check processing on the MAC PDU received from the MAC layer, and transmits it to the receiving end device.

For the receiving end device, after the CRC check module in the physical layer receives the data, it can perform CRC check on the data. If the check passes, the data can be submitted to the MAC layer. The MAC layer can include a demultiplexing entity, HARQ entity, and decoding entity. After receiving the MAC PDU submitted by the physical layer, the decoding entity in the MAC layer can decode the MAC PDU. If the decoding is correct, it can The MAC PDU is delivered to the HARQ entity, and then the HARQ entity is delivered to the demultiplexing entity, and the HARQ entity can also send HARQ feedback information. Further, after receiving the MAC PDU, the demultiplexing entity can demultiplex to obtain the MAC SDU, and submit it to the RLC layer through the corresponding logical channel.

The decoding and HARQ feedback process of the receiving end device will be described in detail below in conjunction with FIG. 2c.

Figure 2c is a schematic diagram of a possible flow of decoding and HARQ feedback for the receiving end device. As shown in Figure 2c, the flow can include three parts. The first part is for the decoding entity to perform the decoding operation, and the second part is for the decoding entity to perform the decoding operation. Submitted to the HARQ entity, the third part is the HARQ entity sending HARQ feedback information.

In step 201, it is determined whether the received data is newly transmitted data, if it is newly transmitted data, step 202 is executed, and if it is not newly transmitted data (for example, retransmitted data), step 203 is executed.

In step 202, the data is decoded, and step 205 is executed.

In step 203, it is judged whether the decoding has not been successful. If the decoding has not been successful, then step 204 is executed. If the decoding has been successful, the decoding may not be performed.

In step 204, the data and the previous data are combined and decoded, and step 205 is executed.

In step 205, it is determined whether the decoding is successful, if the decoding fails, step 206 is executed, and if the decoding succeeds, step 207 is executed.

In step 206, it is determined whether the decoding has ever been successful, if yes, then step 208 is executed, and if not, step 207 is executed.

In step 207, the data stored in the HARQ buffer is updated, and step 211 is executed.

In step 208, it is determined whether it is broadcast data, if it is, then step 210 is executed, and if not, step 209 is executed.

In step 209, it is determined whether it is the first successful decoding, if it is, then step 210 is performed, and if not, step 211 is performed.

In step 210, the decoding result is delivered to the upper layer (that is, the demultiplexing entity in FIG. 2b), and step 211 is executed.

In step 211, it is determined whether the feedback condition is met, if so, step 213 is executed, and if not, step 212 is executed.

Among them, the non-compliance with the feedback condition may refer to at least one of the following: (1) The data is a physical downlink control channel (physical downlink) scrambled by a temporary cell-radio network temporary identifier (TC-RNTI). control channel, PDCCH) scheduled data; (2) the data is broadcast data; (3) the timing advance is invalid.

Exemplarily, in the above (1), the TC-RNTI may be a temporary identifier allocated by the network device to the terminal device. In the above (2), the data is broadcast data, which can be understood as the data sent by broadcast. In (3) above, the network device can send a timing advance command to the terminal device. For example, the network device can estimate the timing advance of the terminal device according to the random access preamble sent by the terminal device, and then send the timing advance command to the terminal device; accordingly; The terminal device can obtain the timing advance according to the timing advance command. After the network device sends a timing advance command to the terminal device, it will start a timing advance timer (time advance timer, TA timer), and the terminal device will also turn on the same TA timer after getting the timing advance, and both the network device and the terminal device maintain TA timer can determine whether the timing advance is valid according to whether the TA timer has timed out. If the TA timer does not expire, the timing advance is considered valid, otherwise, the timing advance is considered invalid.

Step 212: The HARQ entity does not notify the physical layer to send HARQ feedback information.

Step 213: The HARQ entity notifies the physical layer to send HARQ feedback information.

According to the above content, since data may be wrong during transmission, the transmitted data can be monitored by means of encoding and decoding, CRC check, etc. For example, the sending end device can multiplex one or more service data into the same transmission block, process the HARQ process, perform encoding, add CRC check, and then send it to the receiving end device. After receiving the data, the receiver can perform CRC check, and decode after the CRC check is successful. If the decoding is successful, the data transmission is correct, and the data can be submitted to the upper layer; if the CRC check fails or decodes Failure means that the data is transmitted incorrectly, and the data is not delivered to the upper layer. After the retransmitted data arrives, the combined decoding is performed, and the data is not delivered to the upper layer until the decoding is successful. In this manner, the receiving end device can deliver the data block to the upper layer only when it is determined that the data transmission is correct, which can effectively meet the requirements of services with higher fault tolerance.

However, with the development of wireless communication networks, applications that can be supported are more and more diverse, such as being able to support more and more services such as high-precision voice and high-definition video. The data volume of these services is very large and the data delay requirements are high. After the data packet is transmitted incorrectly, if it is not submitted to the upper layer, but discarded or waited for retransmission, on the one hand, due to the failure to make full use of the receiving end equipment already Received data packets will lead to waste of resources. On the other hand, due to the relatively high latency requirements of this type of service, discarding incorrectly transmitted data packets or waiting for retransmission may result in poor user experience, such as high-definition video Taking services as an example, it may cause video freezes when users watch videos.

Based on this, even if the data packet is transmitted incorrectly, it can be considered to continue to be submitted to the upper layer. In this case, although the application layer may still be unable to completely decode correctly due to the data packet transmission error, some mosaic phenomena may appear in the video. However, compared to the video freeze caused by the above method, the received data packet can be effectively used, and the user experience can also be improved. In other words, for services similar to high-precision voice, high-definition video, etc., due to the high data delay requirements and low fault tolerance requirements, it can be considered to submit to the upper layer after the data packet transmission error, that is, perform error delivery . Among them, the high delay requirement can be understood as if the data packet arrives within a certain time, it is useful to the receiving device, otherwise it is useless; the low requirement for fault tolerance can be understood as the data that has an error in the transmission process Packets are also useful to the receiving device.

Furthermore, an embodiment of the present application provides a data transmission method for implementing the wrong delivery of data packets, so as to effectively use the data packets that the receiving end device has received to meet the transmission requirements of the service.

The data transmission method provided by the embodiment of the present application may involve the interaction between two communication devices. The two communication devices are, for example, a first communication device and a second communication device. The first communication device may be the sender device, and the second communication device may be The communication device is a receiving device; or, the second communication device may be a sending device, and the first communication device is a receiving device. Further, the first communication device may be a network device or a communication device capable of supporting the network device to implement the functions required by the method, and of course, it may also be another communication device, such as a chip or a chip system. The second communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, and of course it may also be another communication device, such as a chip or a chip system. For ease of introduction, in the following, the method is executed by a network device and a terminal device as an example, that is, an example is that the first communication device is a network device and the second communication device is a terminal device.

When the first communication device is a network device and the second communication device is a terminal device, the communication between the terminal device and the network device may include uplink communication and downlink communication. In the uplink communication, the terminal device can form a data packet that supports error delivery and sends the data packet to the network device. If the data packet is transmitted incorrectly, the network device can perform error delivery. In downlink communication, the network device can form a data packet that supports error delivery and sends the data packet to the terminal device. If the data packet is transmitted incorrectly, the terminal device can perform error delivery. The situation of uplink communication and downlink communication will be described in detail below in conjunction with Embodiment 1 and Embodiment 2 respectively.

It should be noted that: (1) In other possible embodiments, the first communication device and the second communication device may also be other possible devices, for example, the first communication device is the first terminal device, and the second communication device is the first communication device. Two terminal devices. In this case, the first terminal device can form a data packet that supports error delivery, and sends the data packet to the second terminal device. If the data packet is transmitted incorrectly, the second terminal device can perform error delivery; Alternatively, the second terminal device may construct a data packet, which supports error delivery, and sends the data packet to the first terminal device. If the data packet is transmitted incorrectly, the first terminal device may perform error delivery.

(2) In the embodiment of this application, the communication between the network device and the terminal device (or between the first terminal device and the second terminal device) can be through a licensed spectrum (licensed spectrum), or through an unlicensed spectrum (unlicensed spectrum) For communication, it is also possible to communicate through licensed spectrum and unlicensed spectrum at the same time, which is not limited. The network equipment and terminal equipment can communicate through the frequency spectrum less than 6 gigahertz (gigahertz, GHz), or communicate through the frequency spectrum greater than or equal to 6GHz, and can also use the frequency spectrum less than 6GHz and greater than or equal to 6GHz at the same time Of the spectrum for communication. That is, this application is applicable to both low-frequency scenes (for example, sub 6G) and high-frequency scenes (greater than or equal to 6G). The embodiment of the present application does not limit the spectrum resource used between the network device and the terminal device.

Example one

In the first embodiment, some possible implementations will be described for the uplink communication situation.

FIG. 3 is a schematic diagram of the process corresponding to the data transmission method provided in Embodiment 1 of the application, as shown in FIG. 3, including:

Step 301: The network device sends configuration information 1 to the terminal device.

Correspondingly, in step 302, the terminal device receives the configuration information 1 from the network device.

Exemplarily, the configuration information 1 may be used to configure at least one of the following: whether one or more services supported by the terminal device support errors; whether one or more cells support error delivery; whether one or more logical channels support error delivery. The following describes the configuration information 1 in detail in combination with Example 1 and Example 2.

Example 1

The terminal device can support one or more services, and different services may have different requirements. For example, some services require that data packets must be transmitted correctly at the receiver before being submitted, while some services can tolerate incorrect submission. Therefore, the configuration information 1 can be used to configure whether one or more services support error delivery. For example, configuration information 1 is used to configure business A to support error delivery, and business B does not support error delivery.

Exemplarily, there can be multiple ways for configuration information 1 to configure whether one or more services support error delivery. For example, configuration information 1 can be configured by configuring whether the logical channels corresponding to one or more services support error delivery. Or whether multiple services support error submission. For example, service A corresponds to logical channel 1, service B corresponds to logical channel 2, configuration information 1 can configure logical channel 1 to support error delivery, logical channel 2 does not support error delivery, and the terminal device can according to whether the logical channel corresponding to the service supports error delivery To find out whether the business supports error submission. For example, the logical channel 1 corresponding to business A supports error delivery, and then business A supports error delivery; the logical channel 2 corresponding to business B does not support error delivery, and business B does not support error delivery.

Among them, there may be multiple ways for the network device to determine whether one or more services support error delivery. In a possible implementation manner, the network device receives service information of one or more services from the core network device; taking service A as an example, the service information of service A includes at least one of the following: the delay budget of service A, Error delivery instructions, where the error delivery instructions are used to indicate whether business A instructs wrong delivery. If the business information of service A includes an error delivery instruction, the network equipment can determine whether business A indicates an error delivery according to the error delivery instruction; if the business information of business A includes the delay budget of business A, the network equipment can determine whether business A has a delay budget according to the time of business A. Delay the budget to determine whether Business A supports wrong submission.

In this example, configuration information 1 can also be used to configure whether one or more cells support error delivery. Refer to Table 1 for the classification of services and cells that support error delivery.

Table 1: Business and community support classification for wrong submission

According to Table 1, if configuration information 1 is configured with business A to support error delivery, business B does not support error delivery, and cell 1 is also configured to support error delivery, business A supports error delivery in cell 1, and business B does not support error delivery in cell 1. Incorrect submission. For another example, if configuration information 1 is configured with business A to support error delivery, business B does not support error delivery, and cell 1 does not support error delivery, then business A does not support error delivery in cell 1, and business B does not support error delivery in cell 1. Incorrect submission.

Example 2

The terminal device can support one or more services, and the data of each service can be mapped to one or more data flows. For the same service, some data flows may support error delivery, and some data flows may not Support wrong submission. In this case, configuration information 1 can be used to configure whether one or more data streams support error delivery. Further, because there is a correspondence between data streams and logical channels, it can also be understood that configuration information 1 is used to configure one Or whether multiple logical channels support error delivery. For example, the data of service A can be mapped to data stream A1 and data stream A2, data stream A1 supports error delivery, data stream A2 does not support error delivery, data stream A1 corresponds to logical channel 1, and data stream A2 corresponds to logical channel 2. In this case, configuration information 1 can configure logical channel 1 to support error delivery, and logical channel 2 does not support error delivery. For another example, data packets in service B can be mapped to data stream B3 and data stream B4. Both data stream B3 and data stream B4 do not support error delivery. Data stream B3 and data stream B4 can correspond to the same logical channel, such as logical Channel 3. In this case, configuration information 1 can configure logical channel 3 to not support error delivery.

There are many ways for the network device to determine whether one or more data streams support error delivery. In a possible implementation, the network device receives service information of one or more services from the core network device; taking service A as an example, the service information of service A includes one or more data streams corresponding to service A ( For example, the error delivery instructions of the data stream A1 and the data stream A2), for example, the error delivery instructions of the data stream A1 are used to indicate whether the data stream A1 supports error delivery.

It should be noted that the above-mentioned business A or business B can be understood as a business of the same business type, or can also be understood as a certain business, which is not specifically limited.

Step 303: The terminal device constructs a first data packet, and the first data packet supports error delivery.

Here, the formation of the first data packet by the terminal device can be understood as that the multiplexing entity in the MAC layer of the terminal device multiplexes data received from at least one logical channel to obtain the first data packet.

Exemplarily, the terminal device can construct a data packet (such as the first data packet) according to the configuration information 1. For example, the terminal device can be based on at least one of whether the service supports error delivery, whether the cell supports error delivery, and whether the logical channel supports error delivery. Items to form a data package. For example, when the configuration information 1 is the configuration information 1 described in the above example 2, when the terminal device is forming a data packet, if the serving cell of the terminal device (can also be understood as the cell that transmits the data packet formed by the terminal device) ) To support error delivery, the terminal device can try to compose data in at least one logical channel that supports error delivery into the same data packet, and try to compose data in at least one logical channel that does not support error delivery into the same data packet ; In other words, the terminal device can try not to combine the data of the logical channel that supports erroneous delivery and the data of the logical channel that does not support erroneous delivery into the same data packet.

In this embodiment of the application, the first data packet supports error delivery, which may include at least one of the following: the service to which the first data packet belongs supports error delivery; the cell that transmits the first data packet supports error delivery; at least one part of the logical channel or All support wrong submission. For example, the business to which the first data packet belongs is business A, and if business A supports error delivery, the first data packet supports error delivery. For another example, the service to which the first data packet belongs is service A, and if service A supports erroneous delivery, and the cell that transmits the first data packet supports erroneous delivery, the first data packet supports erroneous delivery. For another example, the first data packet includes data from at least one logical channel, and if at least one logical channel supports error delivery, the first data packet supports error delivery. For another example, the first data packet includes data from at least one logical channel, and if part of the logical channels of the at least one logical channel supports error delivery, the first data packet supports error delivery. In other possible examples, the first data packet includes data from at least one logical channel. If part of the logical channels of the at least one logical channel does not support error delivery, the first data packet may not support error delivery.

Step 304: The terminal device sends the first data packet to the network device.

Correspondingly, in step 305, the network device receives the first data packet from the terminal device.

Here, after the MAC layer of the terminal device constructs the first data packet, it can record the positions of the SDAP header, PDCP header, RLC header, and MAC header in the first data packet, and notify the physical layer, for example, the MAC layer can submit to the physical layer The first data packet and the indication information a. The indication information a is used to indicate the positions of the SDAP header, the PDCP header, the RLC header, and the MAC header in the first data packet. Correspondingly, after receiving the first data packet and the indication information a, the physical layer can prioritize the successful transmission of the bits at the location of the SDAP header, PDCP header, RLC header, and MAC header when transmitting the first data packet.

Exemplarily, the MAC layer informs the physical layer of the positions of the SDAP header, PDCP header, RLC header, and MAC header in the first data packet. It can be understood that the MAC layer informs or tells the physical layer which bits are more important in the first data packet. What is described here is that the MAC layer notifies the physical layer. In other possible implementations, the network device may also pre-configure the rule and send the rule to the terminal device. Among them, this rule can be used to characterize which bits in data packets of different sizes are more important. For example, if the size of the data packet is A, the first X1 bits in the data packet are more important. If the size of the data packet is B, then The first X2 bits in the data packet are more important. According to this rule, the terminal device can infer which bits are more important for a data packet of each size, and then can construct a data packet according to this rule. The subsequent network device receives the data packet from the terminal device, and before decoding the data packet, it can determine which bits in the data packet are more important according to the rules and the size of the data packet, so as to give priority to ensuring the successful decoding of the more important bits.

It should be noted that if the terminal device determines that the first data packet to be transmitted needs to perform error delivery (for example, the network device schedules the first resource to the terminal device and instructs the first resource to support error delivery, the terminal device will be set up in the first resource In this case, the terminal device can determine that the first data packet to be transmitted needs to perform error delivery), then when constructing the first transmission packet, it can be constructed in a segmented manner, and then the first transmission packet A data packet may include a PDCP SDU or a PDCP SDU segment; or it may be described as the first data packet may include an RLC SDU or an RLC SDU segment; or it may be described as the first data packet may include a MAC SDU or a MAC SDU fragment. In this case, after receiving the first data packet submitted by the MAC layer, the physical layer can learn the position of the SDAP header, PDCP header, RLC header, and MAC header in the first data packet (such as SDAP header, PDCP header, RLC) Header and MAC header are distributed in the front part of the first data packet), and then when transmitting the first data packet, priority is given to ensuring the successful transmission of the bits at the location of the SDAP header, PDCP header, RLC header, and MAC header. The bits can be transmitted correctly. In this way, when the MAC layer submits the first data packet to the physical layer, there is no need to submit the indication information a to indicate the positions of the SDAP header, the PDCP header, the RLC header, and the MAC header in the first data packet.

In this embodiment of the present application, the first data packet sent by the terminal device to the network device may be scheduling-based data transmission, or may also be scheduling-free (grant free, GF) data transmission. Among them, the scheduling-free permission may also be referred to as configured grant (CG).

In scheduling-based data transmission, the network device can send an uplink (UL) grant to the terminal device. The uplink grant is used to indicate the first resource. Accordingly, after the terminal device receives the uplink grant, it can The first data packet is sent on the resource. Among them, there can be many triggers for the network device to send the uplink authorization to the terminal device. For example, if the terminal device determines that it needs to send the first data packet, it can first send it to the network device on the physical uplink control channel (PUCCH). Send a scheduling request (scheduling request, SR), and then the network device can grant uplink authorization to the terminal device after receiving the SR.

In data transmission without scheduling permission, the network device may pre-configure periodic resources, and when the terminal device needs to send the first data packet, it may send the first data packet through the pre-configured first resource. Network equipment pre-configured periodic resources can be divided into two types. Type 1 (Type 1) means that the network equipment configures the period and start offset and indicates the specific resource location through configuration information 2, unless the terminal device receives Release the command, otherwise it can be considered that the resource appears periodically. Type 2 (Type 2) means that the network device configures the period and start offset through configuration information 3, and then activates and instructs specific information through downlink control information (DCI) (referred to as DCI-1 for ease of description) For resources (such as indicating the time domain location and frequency domain location of the resource), unless the terminal device receives a deactivation command, it can be considered that the resource indicated by DCI-1 appears periodically.

Some possible implementation manners of step 303 to step 305 are described below.

Implementation method 1

The network device may indicate to the terminal device whether the data carried by the first resource supports error delivery. Correspondingly, according to the instructions of the network device, if the terminal device determines that the data carried by the first resource supports erroneous delivery, it can construct a first data packet that supports erroneous delivery (step 303), and carry the first data packet to the first resource And send it to the network device (step 304). Furthermore, the network device may receive the first data packet on the first resource (step 305). With this implementation method, the network device determines whether the transmission supports error delivery by indicating whether the data carried by the first resource supports error delivery, thereby increasing the flexibility of network device control.

It should be noted that in other possible embodiments, if the terminal device determines that the data carried by the first resource does not support erroneous delivery, it can also construct a data packet that does not support erroneous delivery, and carry the data packet on the first resource. Send to the network device. In the embodiment of this application, the data carried by the first resource supports incorrect delivery as an example for description.

There may be multiple ways for the network device to indicate to the terminal device whether the data carried by the first resource supports error delivery. For example, (1) If the first resource is allocated by the network device to the terminal device through an uplink authorization, in an example, the uplink authorization may carry indication information 1, which may include 1 bit; for example, the 1 bit The value of is 1, which means that the data carried by the first resource supports erroneous delivery; the value of this 1 bit is 0, which means that the data carried by the first resource does not support erroneous delivery. In another example, if indication information 1 is carried in the uplink authorization, it means that the data carried by the first resource supports erroneous delivery, and if the indication information 1 is not carried in the uplink authorization, it means that the data carried by the first resource does not support erroneous delivery. Or, if indication information 1 is carried in the uplink authorization, it means that the data carried by the first resource does not support erroneous delivery, and if the indication information 1 is not carried in the uplink authorization, it means that the data carried by the first resource supports erroneous delivery.

(2) If the first resource is allocated by the network device to the terminal device in type 1, in an example, the configuration information 2 may carry indication information 1, and the indication information 1 may include 1 bit; for example, the 1 The value of the bit is 1, which means that the data carried by the first resource supports erroneous delivery; the value of this 1 bit is 0, which means that the data carried by the first resource does not support erroneous delivery. In another example, if the configuration information 2 carries indication information 1, it means that the data carried by the first resource supports error delivery, and the configuration information 2 does not carry indication information 1, which means that the data carried by the first resource does not support error delivery. . Alternatively, if the configuration information 2 carries the indication information 1, it means that the data carried by the first resource does not support erroneous delivery, and the configuration information 2 does not carry the indication information 1, which means that the data carried by the first resource supports erroneous delivery.

It should be noted that configuration information 2 can be used to configure one set of resources or multiple sets of resources. For example, configuration information 2 configures period 1, start offset 1, resource 1, and period 2, start offset 2, resource 2. Then the resource 1 that periodically appears according to the period 1 and the start offset 1 can be understood as a set of resources, and the resource 2 that appears periodically according to the period 2 and the start offset 2 can be understood as another set of resources. When configuration information 2 is used to configure multiple sets of resources, you can uniformly configure whether the data carried by multiple sets of resources support error delivery, that is, all data carried by multiple sets of resources can support error delivery, or none of them support error delivery; for example, configuration information 2 Carrying indication information 1 indicates that the data carried by multiple sets of resources supports error delivery, and configuration information 2 does not carry the indication information 1, indicating that none of the data carried by multiple sets of resources supports error delivery. Alternatively, it is also possible to individually configure whether the data carried by each set of resources supports error delivery. For example, if configuration information 2 configures two sets of resources, the first set of resources and the second set of resources, then configuration information 2 carries indication information 1a, then It means that the data carried by the first set of resources supports error delivery, and the configuration information 2 does not carry the instruction information 1a, which means that the data carried by the first set of resources does not support error delivery; the configuration information 2 carries the instruction information 1b, which means the second set The data carried by the resource supports error delivery, and the configuration information 2 does not carry the instruction information 1b, which means that the data carried by the second set of resources does not support error delivery.

(3) If the first resource is allocated by the network device to the terminal device in type 2, in an example, DCI-1 may carry indication information 1, and indication information 1 may include 1 bit; for example, the 1 The value of the bit is 1, which means that the data carried by the first resource supports erroneous delivery; the value of this 1 bit is 0, which means that the data carried by the first resource does not support erroneous delivery. In another example, if DCI-1 carries indication information 1, it means that the data carried by the first resource supports erroneous delivery, and DCI-1 does not carry indication information 1, which means that the data carried by the first resource does not support erroneous delivery. . Alternatively, if the indication information 1 is carried in the DCI-1, it means that the data carried by the first resource does not support erroneous delivery, and if the indication information 1 is not carried in the DCI-1, it means that the data carried by the first resource supports erroneous delivery.

Realization 2

The terminal device constructs the first data packet that supports error delivery (step 303), can carry the first data packet on the first resource and send it to the network device, and can also indicate to the network device whether the first data packet supports error delivery (step 304) ). Furthermore, the network device may receive the first data packet on the first resource (step 305). With this implementation method, after the terminal device constructs a data packet, if it is determined that the constructed data packet supports error delivery, it can indicate to the network device that the data packet supports error delivery, that is, the terminal device can determine whether the transmission supports error delivery Therefore, when the network device allocates resources, it does not need to indicate whether the data carried by the resource supports error delivery, which reduces the processing burden of the network device.

There are many ways for the terminal device to indicate to the network device whether the first data packet supports error delivery. For example, the terminal device can indicate whether the first data packet supports error delivery through indication information 2. The indication information 2 can be uplink control information (uplink control information, UCI).

In an example, the terminal device may send instruction information 2 to the network device, and the instruction information 2 may include 1 bit; for example, if the value of the 1 bit is 1, it means that the first data packet supports error delivery; The value of the bit is 0, which means that the first data packet does not support error delivery. In another example, if the terminal device sends instruction information 2 to the network device, it indicates that the first data packet supports error delivery, and if it does not send instruction information 2 to the network device, it indicates that the first data packet does not support error delivery.

Among them, the terminal device can send the instruction information 2 to the network device in many ways. For example, the terminal device can send the instruction information 2 to the network device on the first resource, that is, the first data packet and the instruction information 2 can be in the first resource. Joint transmission on a resource. The first data packet and the instruction information 2 are jointly transmitted on the first resource, which can be understood as: (1) The first data packet and the instruction information 2 can be jointly transmitted on the first resource by puncture. Independent coding; for example, the terminal device can puncture the first data packet, and then transmit the punctured first data packet and the instruction information 2 on the first resource. Or (2) joint transmission on the first resource by means of joint coding, for example, the terminal device may joint coding the first data packet and the indication information 2, and send the joint coding information on the first resource. Understandably, when the method of puncturing is adopted, the indication information 2 described in the above two examples can be used to indicate whether error submission is supported; when the method of joint coding is adopted, the description in the first example can be adopted. The instruction message 2 to indicate whether error delivery is supported.

Step 306: The network device determines that the transmission of the first data packet is incorrect.

Exemplarily, determining that the first data packet is incorrectly transmitted by the network device may include: the network device determines that the CRC check of the first data packet fails, and/or the network device determines that the decoding of the first data packet fails.

In an example, if the network device determines that the first data packet supports error delivery or needs to perform error delivery, the physical layer of the network device can perform a CRC check after receiving the first data packet, regardless of whether the CRC check passes or not. , Can be submitted to the MAC layer, and further, can also indicate to the MAC layer whether the CRC check is passed. Then the decoding entity of the MAC layer decodes the first data packet (wherein, whether the CRC check is passed can be used as an input parameter when the decoding entity is decoded), if the decoding fails (the CRC check may be Pass or fail), it is determined that the transmission of the first data packet is incorrect; if the CRC check is passed and the decoding is successful, it can be determined that the transmission of the first data packet is correct.

In another example, if the network device determines that the first data packet supports error delivery or needs to perform error delivery, the physical layer of the network device may not perform CRC check after receiving the first data packet and submit it to The MAC layer (in this case can no longer indicate whether the CRC check is passed), the decoding entity of the MAC layer performs decoding. If the decoding fails, it is determined that the first data packet is transmitted incorrectly; if the decoding is successful, it can be Make sure that the first data packet is transmitted correctly. In this way, when the first data packet supports erroneous delivery, the CRC check of the first data packet can no longer be performed, which can effectively save the processing burden.

Step 307: The network device performs error delivery on the first data packet.

Exemplarily, the error delivery of the first data packet by the network device may include at least one of the following: (1) the HARQ entity of the network device performs error delivery of the first data packet; (2) the demultiplexing entity of the network device performs the error delivery of the first data packet; A data packet performs error delivery; (3) the RLC layer entity of the network device performs error delivery for the first data packet; (4) the PDCP layer entity of the network device performs error delivery for the first data packet. Understandably, the error delivery of the first data packet by the network device may also include other layer entities executing error delivery of the first data packet, for example, the SDAP layer entity executing error delivery of the first data packet. Exemplarily, when each entity described above performs error delivery of the first data packet, it can notify the upper layer of the transmission error of the first data packet.

The following is a detailed description of the incorrect delivery of the first data packet performed by the above-mentioned different entities.

(1) The HARQ entity performs incorrect delivery of the first data packet

The HARQ entity may submit the first data packet and the indication information 3 to the demultiplexing entity, and the indication information 3 is used to indicate a transmission error of the first data packet. In an example, the indication information 3 is used to indicate the decoding accuracy rate of the first data packet, for example, the decoding accuracy rate is 30% or 50%.

In an example, the HARQ entity may submit the first data packet and the instruction information 3 to the demultiplexing entity after determining that it meets at least one of the following ①②③. Wherein, ① the decoding accuracy rate of the first data packet is greater than the first threshold; ② the number of retransmissions of the first data packet is greater than the second threshold; ③ the timer corresponding to the first data packet expires. Exemplarily, the duration of the first threshold, the second threshold, and the timer may be specified by the protocol; or, may also be determined by the network device. Further, the network device may also set the first threshold, the second threshold, and the The duration of the timer is sent to the terminal device.

For example, the first threshold may be 80%. After the terminal device receives data packet 1 (data packet 1 is newly transmitted data), if it is determined that the decoding accuracy rate reaches 20% (less than the first threshold), it may not The demultiplexing entity submits and updates the data in the HARQ buffer to data packet 1. After receiving data packet 2 (data packet 2 is the first retransmitted data packet), it stores data packet 2 and HARQ buffer If the decoding accuracy reaches 50% (less than the first threshold), the data in the HARQ buffer may not be submitted to the demultiplexing entity, and the data in the HARQ buffer shall be updated to the combined result of data packet 2 and data packet 1. ; After the terminal device receives data packet 3 (data packet 2 is the second retransmitted data packet), it combines and decodes data packet 3 and the data in the HARQ buffer. If the decoding accuracy reaches 90%, it exceeds the first Threshold (80%), the decoding result and indication information 3 can be delivered to the demultiplexing entity, and the indication information 3 indicates that the decoding accuracy of the data packet 3 is 90%.

For another example, the second threshold is 1, and after the terminal device receives data packet 1 (data packet 1 is new data), if it is determined that the decoding has failed, it may not submit to the demultiplexing entity and store it in the HARQ buffer The data of is updated to data packet 1. After receiving data packet 2 (data packet 2 is the first retransmitted data packet), it combines data packet 2 with the data in the HARQ buffer for decoding. If the decoding fails, It is not necessary to submit to the demultiplexing entity, and update the data in the HARQ buffer to the combined result of data packet 2 and data packet 1. The terminal device receives data packet 3 (data packet 3 is the second retransmitted data packet After ), the data packet 3 and the data in the HARQ buffer are combined and decoded. If the decoding still fails, but because the number of retransmissions is 2, which is greater than the second threshold, the decoding result and instruction information can be submitted to the demultiplexing entity 3.

For another example, after the terminal device receives data packet 1 (data packet 1 is newly transmitted data), it starts a timer. If it is determined that the decoding has failed, it may not submit to the demultiplexing entity, and the data in the HARQ buffer Update to data packet 1. After receiving data packet 2 (data packet 2 is the data packet retransmitted for the first time), the terminal device combines data packet 2 with the data in the HARQ buffer to decode, and the decoding fails. If the timer If it has not timed out, it is not necessary to submit to the demultiplexing entity, and update the data in the HARQ buffer to the combined result of data packet 2 and data packet 1. The terminal device receives data packet 3 (data packet 3 is the second retransmission After the data packet), the data packet 3 and the data in the HARQ buffer are combined and decoded, and the decoding still fails. If the timer expires, the decoding result and instruction information 3 can be delivered to the demultiplexing entity.

It should be noted that: (1) Optionally, after the HARQ entity submits the incorrectly transmitted data packet (such as the first data packet) to the demultiplexing entity, if it receives the retransmitted data packet of the first data packet, it can no longer Submit the retransmission data packet to the demultiplexing entity, as shown in (a) or (b) in FIG. 4. In this case, when the service delay requirement is relatively high, the retransmitted data packet may not meet the service delay requirement, and there is no need to submit the retransmitted data packet to the demultiplexing entity to save upper layer processing burden. Or, after the HARQ entity submits the wrongly transmitted data packet (such as the first data packet) to the demultiplexing entity, after the HARQ entity receives the retransmitted data packet of the first data packet, if it is determined that the transmission is correct, it can send to the demultiplexing entity The entity is used to submit the retransmitted data packet. If the transmission error is determined, the retransmitted data packet may not be submitted to the demultiplexing entity, as shown in (c) in FIG. 4. Or, after the HARQ entity submits the wrongly transmitted data packet (such as the first data packet) to the demultiplexing entity, if it receives the retransmitted data packet of the first data packet, the data packet can be transmitted to the demultiplexer regardless of whether the transmission is correct or not. For entity submission, see (d) in Figure 4.

② Optionally, for data packets that support error delivery (such as the first data packet), in one example, the HARQ entity may perform corresponding feedback according to whether to deliver the first data packet to the demultiplexing entity. For example, if the HARQ entity submits the first data packet with a transmission error to the demultiplexing entity, it may no longer feed back an acknowledgement (ACK) or negative answer (NACK) for the first data packet, that is, it does not execute Feedback. For another example, if the HARQ entity delivers the first data packet with a transmission error to the demultiplexing entity, it can feed back an ACK for the first data packet, and if it is not delivered, it can feed back NACK for the first data packet or not perform feedback. For another example, if the HARQ entity submits the first data packet with a transmission error to the demultiplexing entity, the feedback is not performed, and if it is not submitted, it can feed back NACK for the first data packet. In another example, the HARQ entity may also perform corresponding feedback according to whether the first data packet is transmitted correctly. For example, if the HARQ entity determines that the transmission of the first data packet is correct, it feeds back ACK, and if it determines that the transmission of the first data packet is incorrect, it feeds back NACK or does not perform feedback. For another example, if the HARQ entity determines that the transmission of the first data packet is correct, it does not perform feedback, and if it determines that the transmission of the first data packet is incorrect, it feeds back NACK.

(2) The demultiplexing entity performs error delivery on the first data packet.

The demultiplexing entity may deliver the first data packet and the indication information 4 to the RLC layer entity, and the indication information 4 is used to indicate a transmission error of the first data packet. Here, if the first data packet is a MAC PDU submitted by the HARQ entity, after receiving the MAC PDU submitted by the HARQ entity, the demultiplexing entity can demultiplex the MAC PDU into one or more MAC SDUs and submit them to the RLC Layer entity.

Illustratively, taking the first data packet including the MAC SDU1 as an example, the demultiplexing entity may submit the MAC SDU1 to the RLC layer entity after meeting at least one of the following ①②③④. Among them, ① the demultiplexing entity obtains the logical channel identifier corresponding to MAC SDU1; ② the demultiplexing entity obtains the logical channel identifier corresponding to MAC SDU1, and the logical channel corresponding to the logical channel identifier supports error delivery; ③ the demultiplexing entity It is determined that the MAC SDU1 has not been submitted to the RLC layer entity; ④ The demultiplexing entity determines that the decoding accuracy rate of the first data packet is greater than the third threshold. ⑤ The time period T1 has elapsed since the first receiving of the wrong data packet of MAC SDU1.

Among them, the demultiplexing entity can obtain the logical channel identifier corresponding to MAC SDU1 in many ways. In a possible implementation manner, the demultiplexing entity can parse the first data packet to obtain the logical channel corresponding to MAC SDU1 The identifier, for example, the demultiplexing entity parses the MAC subheader of the first data packet to obtain the logical channel identifier corresponding to the MAC SDU1. In another possible implementation manner, the demultiplexing entity may obtain the logical channel identifier corresponding to the MAC SDU1 from the DCI or obtain the logical channel identifier corresponding to the MAC SDU1 from the upper layer configuration message. In the embodiments of the present application, the manner in which the demultiplexing entity obtains the logical channel identifier is not limited, and the following description will be made by taking the demultiplexing entity parsed from the MAC subheader of the first data packet to obtain the logical channel identifier as an example. The third threshold may be agreed upon by a protocol, or may also be determined by the network device. Further, the network device may also send the third threshold to the terminal device. The value of the time length T1 may be agreed upon by the protocol, or may also be determined by the network device. Further, the network device may also send the value of T1 to the terminal device.

A detailed description will be given below in conjunction with Example 1 to Example 5.

Example 1: If the demultiplexing entity obtains one or more logical channel identifiers from the MAC sub-header of the first data packet, then it submits the demultiplexed one or more MAC SDUs to one or more RLC layer entities, Otherwise, it will not be submitted to the upper level.

For example, the first data packet includes MAC SDU1 from logical channel 1 and MAC SDU2 from logical channel 2. When the demultiplexing entity obtains the identification of logical channel 1 and the identification of logical channel 2, it can submit the MAC SDU1 to the RLC layer entity 1 through the logical channel 1, and the MAC SDU2 to the RLC layer entity 2 through the logical channel 2. If the demultiplexing entity has not obtained the identification of logical channel 1 and the identification of logical channel 2, it may not submit it again.

Example 2: The demultiplexing entity parses the MAC sub-header of the first data packet to obtain one or more logical channel identifiers, and some or all of the logical channels in one or more logical channels support error delivery, it can support error delivery For logical channels that do not support erroneous submission, the MAC SDU may not be submitted to the RLC layer entity after demultiplexing.

For example, the first data packet includes MAC SDU1 from logical channel 1 and MAC SDU2 from logical channel 2, and both logical channel 1 and logical channel 2 support error delivery. If the demultiplexing entity obtains the identification of logical channel 1 and the identification of logical channel 2 from the MAC subheader of the first data packet, it can submit the MAC SDU1 to the RLC layer entity 1 through logical channel 1, and to the RLC layer entity 1 through logical channel 2. The RLC layer entity 2 submits the MAC SDU2.

For another example, the first data packet includes MAC SDU1 from logical channel 1 and MAC SDU2 from logical channel 2. Logical channel 1 supports error delivery, and logical channel 2 does not support error delivery. If the demultiplexing entity obtains the identification of logical channel 1 and the identification of logical channel 2 from the MAC sub-header of the first data packet, it can submit MAC SDU1 to RLC layer entity 1 through logical channel 1, and can also indicate MAC SDU1 transmission Error; For MAC SDU2, you can wait for retransmission, and after receiving the retransmitted and successfully combined and decoded MAC SDU2, you can submit the MAC SDU2 to the RLC layer entity 2 through the logical channel 2.

Understandably, in this example, logical channel 1 supports error delivery, indicating that the delay requirements of the data in logical channel 1 may be relatively high, and logical channel 2 does not support error delivery, indicating the delay requirements of data in logical channel 2. It may be lower. In a possible scenario, if the sender device only supports wrongly submitted resources when sending data, the sender device can multiplex the data in logical channel 1 and the data in logical channel 2 into the same data packet ( That is, the first data packet). Correspondingly, after determining that the first data packet is incorrectly transmitted, the demultiplexing entity of the receiving end device may first submit the MAC SDU1 to the upper layer, and then wait for retransmission. After receiving the retransmitted first data packet, the HARQ entity of the receiving end device can deliver the retransmitted first data packet to the demultiplexing entity if the combined decoding is successful, and then the demultiplexing entity can pass the logical channel 2 Submit MAC SDU2 to RLC layer entity 2. In this case, the demultiplexing entity can submit MAC SDU1 to RLC layer entity 1 through logical channel 1 again (it can also notify RLC layer entity 1 that the MAC SDU1 submitted this time is For the second submission, and/or, the RLC layer entity 1 may also be notified that the MAC SDU1 submitted this time is transmitted correctly), or the MAC SDU1 may not be submitted again.

Example 3: The demultiplexing entity parses the MAC subheader of the first data packet to obtain one or more logical channel identifiers, one or more logical channels include a logical channel that supports error delivery (such as logical channel 1), and the solution The multiplexing entity has not submitted the MAC SDU to the upper layer through logical channel 1, and then submits the MAC SDU to the upper layer; otherwise, it does not submit the MAC SDU to the upper layer.

For example, the first data packet includes MAC SDU1 from logical channel 1 and MAC SDU2 from logical channel 2. Logical channel 1 supports error delivery, and logical channel 2 does not support error delivery. If the demultiplexing entity obtains the identification of logical channel 1 and the identification of logical channel 2 from the MAC sub-header of the first data packet, it determines whether the MAC SDU1 has been submitted to the RLC layer entity 1 through logical channel 1. Channel 1 delivers MAC SDU1 to RLC layer entity 1 (for example, the first data packet is a retransmitted data packet of data packet 1, and the demultiplexing entity has already delivered the MAC SDU1 in data packet 1 to the RLC layer entity through logical channel 1. 1), MAC SDU1 may no longer be submitted, or, MAC SDU1 may be submitted to RLC layer entity 1 through logical channel 1 again, and further, RLC layer entity 1 may be notified that this submission of MAC SDU1 is the Nth time ( For example, the second or third time) MAC SDU1 is submitted, and/or RLC layer entity 1 can also be notified that the transmission of MAC SDU1 is incorrect (or the transmission is correct); if it has not been submitted to RLC layer entity 1 through logical channel 1 For MAC SDU1, MAC SDU1 can be delivered to RLC layer entity 1 through logical channel 1. For the MAC SDU2, it can wait for retransmission, and after receiving the retransmitted and successfully combined and decoded MAC SDU2, the MAC SDU2 can be delivered to the RLC layer entity 2 through the logical channel 2.

Example 4: The demultiplexing entity parses the MAC subheader of the first data packet to obtain one or more logical channel identifiers, one or more logical channels include a logical channel that supports error delivery (such as logical channel 1), and HARQ Indicate that the decoding accuracy rate of the first data packet is greater than the third threshold, then the MAC SDU can be delivered to the upper layer through logical channel 1, otherwise the MAC SDU is not delivered to the upper layer.

For example, the first data packet includes MAC SDU1 from logical channel 1 and MAC SDU2 from logical channel 2. Logical channel 1 supports error delivery, and logical channel 2 does not support error delivery. If the demultiplexing entity obtains the identification of logical channel 1 and the identification of logical channel 2 from the MAC sub-header of the first data packet, it can determine whether the decoding accuracy of the first data packet is greater than the third threshold according to the indication information 3. If the decoding accuracy rate of the first data packet is greater than the third threshold, the MAC SDU1 can be delivered to the upper layer through logical channel 1. For MAC SDU2, the retransmission can be waited for, and the retransmission can be received and combined decoding After the successful MAC SDU2, the MAC SDU2 can be delivered to the RLC layer entity 2 through the logical channel 2; if the decoding accuracy rate of the first data packet is less than or equal to the third threshold, the MAC SDU1 is no longer delivered.

Example 5: The demultiplexing entity parses the MAC subheader of the first data packet to obtain one or more logical channel identifiers, and the one or more logical channels include a logical channel that supports error delivery (such as logical channel 1). If the demultiplexing entity determines that the time period T1 has elapsed since the first reception of the error packet of MAC SDU1, it can deliver MAC SDU1 to the upper layer through logical channel 1, otherwise it will not deliver it to the upper layer.

For example, the demultiplexing entity receives data packet 1. Data packet 1 includes MAC SDU1 from logical channel 1 and MAC SDU2 from logical channel 2. Logical channel 1 supports error delivery, and logical channel 2 does not support error delivery. If the demultiplexing entity determines that the data packet 1 is an error data packet of the MAC SDU1 received for the first time, it may not submit the MAC SDU1 and the MAC SDU2, and starts a timer, and the duration of the timer is T1. The demultiplexing entity receives the duplicate data packet of the data packet 1 (referred to as the data packet 2), and the transmission of the data packet 2 is wrong, but at this time the timer expires, the demultiplexing entity can submit the MAC SDU1 to the upper layer through the logical channel 1. For the MAC SDU2, it can wait for retransmission, and after receiving the retransmitted and successfully combined and decoded MAC SDU2, the MAC SDU2 can be delivered to the RLC layer entity 2 through the logical channel 2.

Understandably, the above examples 1 to 5 only describe some exemplary situations. The embodiments of this application may also include other possible situations. For example, the demultiplexing entity may also submit the MAC to the upper layer when multiple conditions are met at the same time. SDU; For example, the first data packet includes MAC SDU1, and the demultiplexing entity may, in the case where it is determined that the MAC SDU1 has not been submitted to the RLC layer entity, and the decoding accuracy of the first data packet is greater than the third threshold, the upper layer Submit MAC SDU1, the details will not be listed one by one.

It should be noted that if the demultiplexing entity determines that the MAC CE is included in the first data packet, the MAC CE may be applied. In an example, the demultiplexing entity may apply the MAC CE included in the first data packet after determining that the transmission of the first data packet is correct. In another example, the demultiplexing entity may perform the behavior indicated by the MAC CE after meeting at least one of the following ①②③. Among them, ① the demultiplexing entity parses the first data packet to obtain the logical channel identification; ② the demultiplexing entity determines that the first data packet is received for the first time; ③ the demultiplexing entity determines that the decoding accuracy of the first data packet is greater The fourth threshold. The fourth threshold may be determined by the network device, and further, the network device may also send the fourth threshold to the terminal device.

Exemplarily, there may be multiple specific implementations of applying the MAC CE, such as executing the behavior indicated by the MAC CE. Here are a few examples to explain in detail some possible implementations of MAC CE. For example, MAC CE is a buffer status report (BSR) MAC CE, and the network device can schedule the terminal device according to the BSR. For example, MAC CE is a power headroom report (PHR) MAC CE, and the network device can schedule the terminal device according to the PHR. For example, if the terminal device reports that its power headroom is small, and the network device finds that it reports PHR At this time, the uplink sub-band width used by the terminal device is 4 MHz, which indicates that the power of the terminal device is not enough to support the sub-band transmission greater than 4 MHz, which can avoid allocating a sub-band width greater than 4 MHz to the terminal device at a time.

(3) The RLC layer entity and the PDCP layer entity perform error delivery of the first data packet

Exemplarily, when the RLC layer entity or the PDCP layer entity receives the MAC SDU (such as MAC SDU1) from the MAC layer, and the MAC layer indicates that the MAC SDU1 is a data packet with a transmission error, the RLC layer entity or the PDCP layer entity can be based on the RLC layer. The sequence number (SN) and PDCP SN move the windows of their respective layers, that is, the RLC layer entity can move the RLC SN window, and the PDCP layer entity can move the PDCP SN window.

In an example, when the RLC layer entity or the PDCP layer entity receives the MAC SDU1 from the MAC layer, and the MAC layer indicates that the MAC SDU1 is a data packet with a transmission error, if the RLC layer entity or the PDCP layer entity determines that it is the first reception To MAC SDU1, the window of each layer can be moved according to the RLC sequence number (SN) and PDCP SN. If it is determined that it is not the first time to receive MAC SDU1 (for example, it may be the second or third time to receive MAC SDU1), Therefore, the windows of the respective layers can no longer be moved according to the RLC SN and PDCP SN, thereby avoiding errors caused by moving windows for the same MAC SDU multiple times. Exemplarily, even if the MAC SDU1 received for the second or third time is transmitted correctly, the RLC layer entity or the PDCP layer entity may no longer move the windows of the respective layers according to the RLC SN and PDCP SN.

In addition, for the error delivery of the first data packet, it is also necessary to explain:

(1) When the RLC layer entity receives the MAC SDU (such as MAC SDU1) from the MAC layer, and the MAC layer indicates that MAC SDU1 is a transmission error (or decoding failure) packet, the RLC layer entity can be used to the upper PDCP layer The entity submits the data packet, or may not submit the data packet to the upper PDCP layer entity. The specific implementation can be determined by the network device. Further, the network device can also configure the specific implementation for the terminal device, for example, the network device This specific implementation can be configured for terminal equipment through RRC signaling.

(2) If the RLC layer entity receives the same MAC SDU from the MAC layer multiple times, and each time the MAC layer indicates a transmission error (or decoding failure), the RLC layer entity can submit the MAC to the PDCP layer entity each time SDU; or, the MAC SDU can also be submitted to the PDCP layer entity for the first N times, and no subsequent submissions are made. The value of N can be determined by the network device. Further, the network device can also indicate the value of N to the terminal device. Value; or, the RLC layer entity may indicate that the decoding success rate is greater than a certain threshold after receiving the MAC layer (the threshold may be agreed by the protocol, or it may be determined by the network device, further, the network device may also When the value of the threshold is sent to the terminal device), the MAC SDU is submitted to the PDCP layer entity; or, the RLC layer entity can receive the MAC SDU error packet for the first time since the time period T2 has elapsed. When the MAC SDU is delivered to the PDCP layer entity, the duration T2 may be agreed upon by the protocol, or may also be determined by the network device. Further, the network device may also send the value of T2 to the terminal device.

(3) When the PDCP layer entity (or SDAP layer entity) submits to the upper layer (such as the application layer), it can indicate to the upper layer that the data packet it submits is a data packet with a transmission error. Understandably, since both the network device and the terminal device may act as the receiving end device of the data packet, when the network device is used as the receiving end device, the PDCP layer entity (or SDAP layer entity) of the network device can submit to the application layer of the application server Data packet, and indicate that the submitted data packet is a transmission error data packet; when the terminal device is used as the receiving end device, the PDCP layer entity (or SDAP layer entity) of the terminal device can submit the data packet to the application layer of the terminal device, and Indicate that the delivered data packet is a data packet with a transmission error, so that the application layer of the terminal device can count the packet error rate (PER), which is subsequently fed back to the application layer of the application server. With the above method, the core network device can charge the data packet according to the transmission condition of the data packet. For example, when the core network device learns that the data packet is a data packet with a transmission error, it may not participate in traffic statistics for the data packet, and does not Charging, alternatively, the flow or charging can also be calculated according to a preset ratio. For example, if the data packet includes 100 bytes, it can be calculated as 40 bytes when performing traffic statistics. The embodiment of the present application does not limit the preset ratio.

Example two

In the second embodiment, some possible implementations will be described for the downlink communication situation.

FIG. 5 is a schematic diagram of the process corresponding to the data transmission method provided in the second embodiment of the application, as shown in FIG. 5, including:

Step 501: The network device sends configuration information 4 to the terminal device, and the configuration information 4 is used to configure the error delivery function for the terminal device.

Correspondingly, in step 502, the terminal device receives configuration information 4.

As an example, the terminal device can report to the network device whether the terminal device supports error delivery, if the terminal device supports error delivery, the network device can send configuration information to the terminal device 4, if the terminal device does not support error delivery, the network device can no longer Send configuration information to the terminal device4. There are many ways for the terminal device to report whether the terminal device supports error delivery to the network device. For example, the terminal device can report the capability information of the terminal device to the network device, and the capability information is used to indicate whether the terminal device supports error delivery.

In an example, a terminal device configured with an error delivery function, after receiving a data packet, if it is determined that the data packet needs to perform error delivery, the physical layer can no longer perform a CRC check on the data packet and submit the MAC Floor.

In another example, a terminal device configured with an error delivery function, after receiving a data packet, if it is determined that the data packet needs to perform error delivery, it can perform a CRC check on the data packet at the physical layer, regardless of whether the check is performed or not. Pass, the data packet can be submitted to the MAC layer.

Exemplarily, the configuration information 4 may include a first parameter and a second parameter. The first parameter is used to indicate whether a CRC check needs to be performed (or whether to turn off the CRC) for a data packet that supports error delivery, and the second parameter is used It is indicated that the data packet submitted for supporting errors shall be submitted to the upper layer when the decoding error occurs. Wherein, the first parameter and the second parameter may be the same parameter, or may also be two different parameters, which are not specifically limited.

Step 503: The network device forms a second data packet, and the second data packet supports error delivery.

Here, the formation of the second data packet by the network device can be understood as the multiplexing entity in the MAC layer of the network device multiplexing the data received from at least one logical channel to obtain the second data packet. Wherein, the second data packet supports erroneous delivery, which may include at least one of the following: the service to which the second data packet belongs supports erroneous delivery; the cell transmitting the second data packet supports erroneous delivery; at least one logical channel supports part or all of erroneous delivery . For specific implementation, please refer to the related description of the first data packet supporting error delivery in the first embodiment.

Exemplarily, if the network device includes a CU and a DU, a data packet (such as a second data packet) may be formed by the DU. In an example, the CU can send notification information to the DU through the F1-U interface. The notification information can refer to the related description of configuration information 1 in the first embodiment. For example, the notification information can be used to notify the DU whether one or more services are supported. Error delivery, or notification information can be used to inform the DU whether one or more logical channels support error delivery. Correspondingly, the DU can construct a data packet according to the notification information. For example, if the notification information is used to notify the DU whether one or more logical channels support error delivery, the DU can try to multiplex the data in the logical channel that supports error delivery into the same data when constructing data packets based on the notification information. In the package, and try to multiplex the data in the logical channel that does not support error delivery into the same data package.

Step 504: The network device sends the second data packet to the terminal device.

Correspondingly, in step 505, the terminal device receives the second data packet from the network device.

Exemplarily, the network device may send the second data packet to the terminal device on the second resource, and indicate whether the second data packet supports error delivery. In some possible examples, the data packets received by the terminal device can be pre-defined or pre-configured to support error delivery, and the network device may no longer indicate to the terminal device whether the second data packet supports error delivery. The second resource may be a dynamically scheduled resource; for example, the network device sends DCI-2 to the terminal device, and DCI-2 is used to schedule the second resource, or DCI-2 is used to indicate the second resource; accordingly, the terminal After receiving the DCI-2, the device can receive the second data packet on the second resource. Alternatively, the second resource can also be a semi-persistent resource; for example, the network device configures a period for the terminal device in advance (for example, configures the period through an RRC message), and then activates it through DCI-3. DCI-3 can indicate the timing of a block of resources. Domain location and frequency domain location, and then the terminal device will think that in each subsequent cycle, the network device will transmit data on this block of resources.

It should be noted that whether the network device supports error delivery of data packets to the terminal device can be understood as the network device indicating whether the MAC PDU supports error delivery. If the MAC PDU supports error delivery, and one or some of the MAC SDUs in the MAC PDU does not support error delivery, the terminal device can submit the MAC SDU that supports error delivery to the upper layer after the decoding fails; for those that do not support error delivery If the MAC SDU is not submitted to the upper layer, it will be submitted to the upper layer after the retransmission is successful.

There may be multiple ways for the network device to indicate whether the second data packet supports error delivery. The following describes several possible implementation ways for dynamic scheduling and semi-persistent scheduling.

(1) Dynamic scheduling

Example 1: DCI-2 may carry indication information 5, which is used to indicate whether the data carried by the second resource supports error delivery. Exemplarily, the indication information 5 may include 1 bit; for example, if the value of this 1 bit is 1, it means that the data carried by the second resource supports wrong delivery; if the value of this 1 bit is 0, it means that 2. The data carried by the resource does not support wrong submission. Understandably, the indication information 5 may be carried in one or more fields of DCI-2, such as the HARQ process number (HARQ process number) indication field, modulation and coding scheme (MCS) carried in DCI-2. ) One or more of indication domain, frequency domain resource assignment (frequency domain resource assignment) indication domain, time domain resource assignment (time domain resource assignment) indication domain, and reserved domain. Take the MCS indication field carrying DCI-2 in indication information 5 as an example. For example, the MCS indication field includes 5 bits and a total of 32 (2 ⁵ ) code points, of which 25 code points have specified their specific meanings, and the remaining 7 One code point is a reserved code point, and two of the remaining 7 code points can be used to indicate whether the data carried by the second resource supports error delivery.

Example 2: If the indication information 5 is carried in the DCI-2, it means that the data carried by the second resource supports erroneous delivery, and the DCI-2 does not carry the indication information 5, which means that the data carried by the second resource does not support erroneous delivery. Alternatively, if the indication information 5 is carried in the DCI-2, it means that the data carried by the second resource does not support erroneous delivery, and the DCI-2 does not carry the indication information 5, which means that the data carried by the second resource supports erroneous delivery.

Example 3: If the terminal device receives DCI-2 according to a preset control-resource set (CORESET) and/or a preset search space (search space), it can determine the second resource scheduled by DCI-2 The carried data supports error delivery. If it is not based on the preset control resource set and the DCI-2 received according to the preset search space, it can be determined that the data carried by the second resource scheduled by DCI-2 does not support error delivery. Wherein, the data carried by the resource scheduled by the DCI carried by the preset control resource set and/or the preset search space supports error delivery. The preset control resource set and/or the preset search space may be configured by the network device for the terminal device.

Example 4: If the terminal device receives DCI-2 through the PDCCH scrambled by the preset RNTI, it can be determined that the data carried by the second resource scheduled by the DCI-2 supports error delivery, if it is not received according to the PDCCH scrambled by the RNTI DCI-2, it can be determined that the data carried by the second resource scheduled by DCI-2 does not support erroneous delivery. Among them, the preset RNTI may be a newly defined RNTI, which is used to indicate that the data carried by the resource scheduled by DCI-2 supports error delivery. The preset RNTI may be configured by the network device for the terminal device.

Example 5: If the terminal device received DCI-2 on the preset bandwidth part (bandwidth part, BWP), it can be determined that the data carried by the second resource scheduled by DCI-2 supports erroneous delivery; otherwise, it can be determined that DCI- 2 The data carried by the scheduled second resource does not support error delivery. Exemplarily, the network device may configure one or more BWPs for the terminal device. For example, the network device may select at least one BWP from the one or more BWPs as the preset BWP after configuring one or more BWPs, and indicate to Terminal equipment; for another example, the network equipment can also indicate that it is a preset BWP while configuring one or some BWPs for the terminal equipment.

Example 6: If the terminal device receives DCI-2 on the preset time-frequency resource, it can be determined that the data carried by the second resource scheduled by DCI-2 supports error delivery; otherwise, it can be determined that the second resource scheduled by DCI-2 supports error delivery. The data carried by the resource does not support error submission. Exemplarily, the preset time-frequency resource may be determined by the network device and instructed by the terminal device.

Understandably, the above example 1 and example 2 can be understood as the network device explicitly indicating whether the data carried by the second resource supports error delivery. Examples 3 to 6 can be understood as the network device indicating implicitly. Whether the data carried by the second resource supports error delivery.

(2) Semi-static scheduling

In an example, DCI-3 may carry indication information 5, which may include 1 bit; for example, if the value of this 1 bit is 1, it means that the data carried by the second resource supports error delivery; the 1 The value of the one bit is 0, which means that the data carried by the second resource does not support erroneous delivery.

In another example, if the indication information 5 is carried in the DCI-3, it means that the data carried by the second resource supports erroneous delivery, and the DCI-3 does not carry the indication information 5, which means that the data carried by the second resource does not support erroneous delivery. . Alternatively, if the indication information 5 is carried in the DCI-3, it means that the data carried by the second resource does not support erroneous delivery, and the DCI-3 does not carry the indication information 5, which means that the data carried by the second resource supports erroneous delivery.

It should be noted that for semi-persistent scheduling, the above description is based on DCI-3 indicating whether the data carried by the semi-persistent scheduling supports error delivery as an example. In other possible embodiments, it can also be used for The periodic RRC message is configured to indicate whether the data carried by the semi-persistent scheduling resource supports error delivery.

Exemplarily, a terminal device can be configured with a maximum of 8 sets of semi-statically scheduled resources on a BWP. When the RRC message is used to indicate whether the data carried by the semi-persistent scheduling resource supports error delivery, it can be separately indicated whether the data carried by each semi-persistent scheduling resource supports error delivery, for example, if a certain set of data is indicated in the RRC message If the data carried by the semi-persistently scheduled resource supports error delivery, there is no need to indicate in the DCI that activates the set of semi-persistent resources. As long as the set of semi-persistent resources is activated, then the set of semi-persistent resources will be transmitted All of the data supports wrong submission. Alternatively, it can also be configured to uniformly configure whether the data carried by all semi-persistent scheduling resources support error delivery. For example, if the semi-persistent scheduling resource supports error delivery is indicated in the RRC message, it can be used in the DCI of the activated semi-persistent scheduling resource No instructions are required. As long as any set of semi-statically scheduled resources is activated, all data transmitted on the set of semi-static resources support error delivery.

Step 506: The terminal device determines that the transmission of the second data packet is incorrect.

In step 507, the terminal device erroneously delivers the second data packet.

Here, step 506 and step 507 can be adaptively referred to step 306 and step 307 in the first embodiment. For example, the terminal device can include HARQ entity, demultiplexing entity, RLC layer entity, PDCP layer entity, SDAP layer entity, The implementation of each entity performing error submission can refer to the implementation of the HARQ entity, demultiplexing entity, RLC layer entity, PDCP layer entity, and SDAP layer entity performing error submission in the network device.

Regarding the first and second embodiments described above, it should be noted that: (1) the first and second embodiments described above can be implemented separately or in combination. In other words, the network equipment in the first embodiment and the network equipment in the second embodiment may be different network equipment, and the terminal equipment in the first embodiment and the terminal equipment in the second embodiment may be different terminal equipment; or, The network device in the first embodiment and the network device in the second embodiment may be the same network device, and the terminal device in the first embodiment and the terminal device in the second embodiment may be the same terminal device.

(2) In this embodiment of the application, taking the first resource as an example, the data carried by the first resource supports erroneous delivery, which can also be described as the first resource supporting erroneous delivery. The logical channel supports error delivery, which can also be described as the data carried by the logical channel supports error delivery. Business support error submission can also be described as the support error submission of data belonging to the business. The data stream supports error delivery, and it can also be described as the data in the data stream supports error delivery.

(3) The configuration information involved in the embodiments of this application (such as configuration information 1, configuration information 2, configuration information 3, or configuration information 4) can be sent to the terminal device in a variety of ways, such as through RRC signaling. Not limited.

(4) The step numbers of the flowcharts described in the embodiments of this application (for example, Figures 3 and 5) are only an example of the execution process, and do not constitute a restriction on the order of execution of the steps. The embodiment of the present application There is no strict execution order between steps that do not have a timing dependency between each other. For example, in FIG. 5, step 501 can be performed before step 503, or can be performed simultaneously with step 503.

The foregoing mainly introduces the solutions provided in the embodiments of the present application from the perspective of device interaction. It can be understood that, in order to implement the above-mentioned functions, the network device or the terminal device may include a corresponding hardware structure and/or software module for performing each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The embodiment of the present application may divide the terminal device and the network device into functional units according to the foregoing method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

In the case of using an integrated unit, FIG. 6 shows a possible exemplary block diagram of a device involved in an embodiment of the present application. As shown in FIG. 6, the apparatus 600 may include: a processing unit 602 and a communication unit 603. The processing unit 602 is used to control and manage the actions of the device 600. The communication unit 603 is used to support communication between the apparatus 600 and other devices. Optionally, the communication unit 603 is also called a transceiving unit, and may include a receiving unit and/or a sending unit, which are used to perform receiving and sending operations, respectively. The device 600 may further include a storage unit 601 for storing program codes and/or data of the device 600.

The apparatus 600 may be the terminal device (or a chip set in the terminal device) in any of the foregoing embodiments, such as the terminal device in Embodiment 1 or Embodiment 2, where the processing unit 602 may support the apparatus 600 to execute the above Actions of the terminal device in each method example; or, the processing unit 602 mainly executes the internal actions of the terminal device in the method example, and the communication unit 603 can support communication between the apparatus 600 and other devices (such as network devices). Alternatively, the apparatus 600 may be the network equipment (or a chip set in the network equipment) in any of the foregoing embodiments, such as the network equipment in Embodiment 1 or Embodiment 2, where the processing unit 602 may support the apparatus 600 to execute The actions of the network equipment in the foregoing method examples; or, the processing unit 602 mainly executes the internal actions of the network equipment in the method examples, and the communication unit 603 can support communication between the apparatus 600 and other devices (such as terminal devices).

In one embodiment, the communication unit 603 is configured to receive the first data packet; the processing unit 602 is configured to: if it is determined that the first data packet is incorrectly transmitted, perform error delivery on the first data packet.

In a possible design, the processing unit 602 determining that the first data packet is incorrectly transmitted includes: the processing unit 602 determines that the CRC check of the first data packet fails; and/or the processing unit 602 determines that the decoding of the first data packet fails .

In a possible design, the communication unit 603 is further configured to: send first indication information, where the first indication information is used to indicate that the data carried by the first resource supports error delivery; wherein the first data packet is carried by the first resource.

In a possible design, the communication unit 603 is further configured to: the communication device sends an uplink grant, the uplink grant is used to indicate the first resource, and the uplink grant carries the first indication information; or, sends the first configuration information, the first configuration information For configuring the first resource, the first configuration information carries first indication information; or, sending control information, the control information is used to activate the first resource, and the control information carries the first indication information.

In a possible design, the communication unit 603 is further configured to: receive second indication information, and the second indication information is used to indicate that the first data packet supports error delivery.

In a possible design, the first data packet and the second indication information are carried in the first resource.

In a possible design, the first data packet is carried on the second resource; the communication unit 603 is further configured to: receive third indication information, which is used to indicate that the data carried by the second resource supports error delivery.

In a possible design, the communication unit 603 is specifically configured to: receive first control information, the first control information is used to schedule second resources, and the first control information carries third indication information; or, to receive second control information, The second control information is used to activate the second resource, and the second control information carries the third indication information; or, to receive the second configuration information, the second configuration information is used to configure the second resource, and the second configuration information carries the third indication information.

In a possible design, the first data packet is carried on the second resource; the communication unit 603 is further configured to: receive the third control information according to the preset control resource set and/or the preset search space, and the third control information is used for The second resource is scheduled; the data carried by the resource scheduled by the preset control resource set and/or the third control information carried by the preset search space supports error delivery; or, the third control information is received on the physical downlink control channel, and the third control The information is used to schedule the second resource; the physical downlink control channel is scrambled by a preset RNTI, and the preset RNTI indicates that the data carried by the resource carried by the third control information carried by the physical downlink control channel supports error delivery.

In a possible design, the communication unit 603 is further configured to receive third configuration information, and the third configuration information is used to configure the error delivery function for the communication device.

In a possible design, the processing unit 602 is further configured to: control the HARQ entity to deliver the first data packet and the fourth indication information to the demultiplexing entity, and the fourth indication information is used to indicate a transmission error of the first data packet.

In a possible design, before the processing unit 602 controls the HARQ entity to deliver the first data packet and the fourth indication information to the demultiplexing entity, it further includes at least one of the following: determining that the decoding accuracy rate of the first data packet is greater than The first threshold; it is determined that the number of retransmissions of the first data packet is greater than the second threshold; it is determined that the timer corresponding to the first data packet has expired.

In a possible design, if the processing unit 602 determines that the HARQ entity receives the retransmitted data packet of the first data packet, it will deliver the retransmitted data packet to the demultiplexing entity; further, the first data packet may be a new transmission. data pack.

In a possible design, before the processing unit 602 controls the HARQ entity to deliver the retransmitted data packet to the demultiplexing entity, it is also used to: determine that the retransmitted data packet is correctly transmitted.

In a possible design, the processing unit 602 is further configured to: control the HARQ entity to feed back an acknowledgement response ACK for the first data packet.

In a possible design, the processing unit 602 is further configured to: control the demultiplexing entity to deliver the first data packet and the fifth indication information to the RLC layer entity, and the fifth indication information is used to indicate a transmission error of the first data packet.

In a possible design, before the processing unit 602 controls the demultiplexing entity to deliver the first data packet to the RLC layer entity, it further includes at least one of the following: parse the first data packet to obtain a logical channel identifier; The logical channel identifier is parsed in the data packet, and the logical channels corresponding to the logical channel identifier support error delivery; determine that the first data packet has not been delivered to the RLC layer entity; determine that the decoding accuracy of the first data packet is greater than the third threshold .

In a possible design, the processing unit 602 is further configured to: if it is determined that the MAC CE is included in the first data packet, apply the MAC CE.

In a possible design, before the processing unit 602 executes the behavior indicated by the MAC CE, it also includes at least one of the following: parse the first data packet to obtain a logical channel identifier; determine that the first data packet is received for the first time; determine that the first data packet is received for the first time; The decoding accuracy rate of a data packet is greater than the fourth threshold.

In a possible design, the processing unit 602 is further configured to: if it is determined that the first data packet is received for the first time, control the RLC layer entity to move the window of the RLC SN.

In yet another embodiment, the processing unit 602 is configured to form a first data packet, and the first data packet supports error delivery; and the communication unit 603 is configured to send the first data packet.

In a possible design, the communication unit 603 is further configured to: receive first indication information, which is used to indicate that the data carried by the first resource supports error delivery; and, send the first data packet on the first resource .

In a possible design, the communication unit 603 is further configured to: receive an uplink grant, which is used to indicate the first resource, and the uplink grant carries first indication information; or, to receive first configuration information, which is used to The first resource is configured, and the first configuration information carries the first indication information; or the control information is received, the control information is used to activate the first resource, and the control information carries the first indication information.

In a possible design, the communication unit 603 is further configured to send second indication information, and the second indication information is used to indicate that the first data packet supports error delivery.

In a possible design, the communication unit 603 sending the first data packet and the second indication information includes: sending the first data packet and the second indication information on the first resource.

In a possible design, the processing unit 602 is further configured to: puncture the first data packet; the communication unit 603 is further configured to: send the punctured first data packet and the second indication information on the first resource Or, the processing unit 602 is further configured to: jointly encode the first data packet and the second indication information; the communication unit 603 is further configured to: send the jointly encoded information on the first resource.

In a possible design, the communication unit 603 is further configured to: receive second configuration information, where the second configuration information is used to indicate whether one or more logical channels support error delivery.

In a possible design, the first data packet is carried on the second resource; the communication unit 603 is further configured to send third indication information, and the third indication information is used to indicate that the data carried by the second resource supports error delivery.

In a possible design, the communication unit 603 is further configured to: receive fourth indication information from the CU, where the fourth indication information is used to indicate whether one or more logical channels support error delivery.

In a possible design, the processing unit 602 is further configured to: control the MAC layer entity to deliver the first data packet and the fifth indication information to the physical layer entity, and the fifth indication information is used to indicate the SDAP header, The position of at least one of the PDCP header, the RLC header, and the MAC header in the first data packet; controlling the physical layer entity to send the first data packet according to the fifth indication information.

It should be understood that the division of units in the above device is only a division of logical functions, and may be fully or partially integrated into one physical entity in actual implementation, or may be physically separated. In addition, the units in the device can be all implemented in the form of software called by processing elements; they can also be all implemented in the form of hardware; part of the units can also be implemented in the form of software called by the processing elements, and some of the units can be implemented in the form of hardware. For example, each unit can be a separate processing element, or it can be integrated in a certain chip of the device for implementation. In addition, it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device. Features. In addition, all or part of these units can be integrated together or implemented independently. The processing element described here can also become a processor, which can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above units may be implemented by an integrated logic circuit of hardware in a processor element or implemented in a form of being called by software through a processing element.

In an example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above method, for example: one or more application specific integrated circuits (ASIC), or, one or Multiple microprocessors (digital singnal processors, DSP), or, one or more field programmable gate arrays (FPGA), or a combination of at least two of these integrated circuits. For another example, when the unit in the device can be implemented in the form of a processing element scheduler, the processing element can be a processor, such as a general-purpose central processing unit (central processing unit, CPU), or other processors that can call programs. For another example, these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).

The above receiving unit is an interface circuit of the device for receiving signals from other devices. For example, when the device is implemented as a chip, the receiving unit is an interface circuit used by the chip to receive signals from other chips or devices. The above unit for sending is an interface circuit of the device for sending signals to other devices. For example, when the device is implemented in the form of a chip, the sending unit is an interface circuit used by the chip to send signals to other chips or devices.

Please refer to FIG. 7, which is a schematic structural diagram of a terminal device provided by an embodiment of the application. It may be the terminal device in the above embodiment, and is used to implement the operation of the terminal device in the above embodiment. As shown in FIG. 7, the terminal device includes: an antenna 710, a radio frequency part 720, and a signal processing part 730. The antenna 710 is connected to the radio frequency part 720. In the downlink direction, the radio frequency part 720 receives the information sent by the network device through the antenna 710, and sends the information sent by the network device to the signal processing part 730 for processing. In the upstream direction, the signal processing part 730 processes the information of the terminal device and sends it to the radio frequency part 720, and the radio frequency part 720 processes the information of the terminal device and sends it to the network device via the antenna 710.

The signal processing part 730 may include a modem subsystem, which is used to process data at various communication protocol layers; it may also include a central processing subsystem, which is used to process terminal equipment operating systems and application layers; in addition, it may also Including other subsystems, such as multimedia subsystems, peripheral subsystems, etc., where the multimedia subsystem is used to control the terminal device camera, screen display, etc., and the peripheral subsystem is used to realize the connection with other devices. The modem subsystem can be a separate chip.

The modem subsystem may include one or more processing elements 731, for example, including a main control CPU and other integrated circuits. In addition, the modem subsystem may also include a storage element 732 and an interface circuit 733. The storage element 732 is used to store data and programs, but the program used to execute the method executed by the terminal device in the above method may not be stored in the storage element 732, but is stored in a memory outside the modem subsystem. When in use, the modem subsystem is loaded and used. The interface circuit 733 is used to communicate with other subsystems.

The modem subsystem can be implemented by a chip, the chip includes at least one processing element and an interface circuit, wherein the processing element is used to execute each step of any method executed by the above terminal device, and the interface circuit is used to communicate with other devices. In one implementation, the unit for the terminal device to implement each step in the above method can be implemented in the form of a processing element scheduler. For example, the device for the terminal device includes a processing element and a storage element, and the processing element calls the program stored by the storage element to Perform the method performed by the terminal device in the above method embodiment. The storage element may be a storage element whose processing element is on the same chip, that is, an on-chip storage element.

In another implementation, the program used to execute the method executed by the terminal device in the above method may be a storage element on a different chip from the processing element, that is, an off-chip storage element. At this time, the processing element calls or loads a program from the off-chip storage element on the on-chip storage element to call and execute the method executed by the terminal device in the above method embodiment.

In yet another implementation, the unit of the terminal device that implements each step in the above method may be configured as one or more processing elements, and these processing elements are arranged on the modem subsystem, where the processing elements may be integrated circuits, For example: one or more ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.

The units of the terminal device that implement each step in the above method can be integrated together and implemented in the form of an SOC, and the SOC chip is used to implement the above method. The chip can integrate at least one processing element and a storage element, and the processing element can call the stored program of the storage element to implement the method executed by the above terminal device; or, the chip can integrate at least one integrated circuit to implement the above terminal The method executed by the device; or, it can be combined with the above implementations. The functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.

It can be seen that the above apparatus for terminal equipment may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any of the methods performed by the terminal equipment provided in the above method embodiments. The processing element can execute part or all of the steps executed by the terminal device in the first way: calling the program stored in the storage element; or in the second way: combining instructions through the integrated logic circuit of the hardware in the processor element Part or all of the steps performed by the terminal device are executed in a manner; of course, part or all of the steps executed by the terminal device can also be executed in combination with the first manner and the second manner.

The processing element here is the same as that described above, and can be implemented by a processor, and the function of the processing element can be the same as the function of the processing unit described in FIG. 6. Exemplarily, the processing element may be a general-purpose processor, such as a CPU, or one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more microprocessors DSP , Or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. The storage element may be realized by a memory, and the function of the storage element may be the same as the function of the storage unit described in FIG. 6. The storage element can be a single memory or a collective term for multiple memories.

The terminal device shown in FIG. 7 can implement various processes related to the terminal device in the method embodiment shown in FIG. 3 or FIG. 5. The operations and/or functions of the various modules in the terminal device shown in FIG. 7 are used to implement the corresponding processes in the foregoing method embodiments. For details, please refer to the descriptions in the above method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

Please refer to FIG. 8, which is a schematic structural diagram of a network device provided by an embodiment of this application. It may be the network device (such as DU) in the above embodiment, and is used to implement the operation of the network device in the above embodiment. As shown in FIG. 8, the network equipment includes: an antenna 801, a radio frequency device 802, and a baseband device 803. The antenna 801 is connected to the radio frequency device 802. In the uplink direction, the radio frequency device 802 receives the information sent by the terminal device through the antenna 801, and sends the information sent by the terminal device to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes the information of the terminal device and sends it to the radio frequency device 802, and the radio frequency device 802 processes the information of the terminal device and sends it to the terminal device via the antenna 801.

The baseband device 803 may include one or more processing elements 8031, for example, a main control CPU and other integrated circuits. In addition, the baseband device 803 may also include a storage element 8032 and an interface 8033. The storage element 8032 is used to store programs and data; the interface 8033 is used to exchange information with the radio frequency device 802. The interface is, for example, a common public radio interface. , CPRI). The above apparatus for network equipment may be located in the baseband apparatus 803. For example, the above apparatus for network equipment may be a chip on the baseband apparatus 803. The chip includes at least one processing element and an interface circuit, wherein the processing element is used to execute the above network. For each step of any method executed by the device, the interface circuit is used to communicate with other devices. In one implementation, the unit for the network device to implement each step in the above method can be implemented in the form of a processing element scheduler. For example, the device for the network device includes a processing element and a storage element, and the processing element calls the program stored by the storage element to Perform the method performed by the network device in the above method embodiment. The storage element may be a storage element with the processing element on the same chip, that is, an on-chip storage element, or a storage element on a different chip from the processing element, that is, an off-chip storage element.

In another implementation, the unit of the network device that implements each step in the above method may be configured as one or more processing elements, and these processing elements are arranged on the baseband device. The processing elements here may be integrated circuits, such as one Or multiple ASICs, or, one or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.

The units for the network equipment to implement each step in the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC). For example, the baseband device includes the SOC chip for implementing the above method. At least one processing element and storage element can be integrated in the chip, and the processing element can call the stored program of the storage element to implement the method executed by the above network device; or, at least one integrated circuit can be integrated in the chip to implement the above network The method executed by the device; or, it can be combined with the above implementations. The functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.

It can be seen that the above apparatus for a network device may include at least one processing element and an interface circuit, wherein at least one processing element is used to execute any of the methods performed by the network device provided in the above method embodiments. The processing element can execute part or all of the steps executed by the network device in the first way: calling the program stored in the storage element; or in the second way: combining instructions through the integrated logic circuit of the hardware in the processor element Part or all of the steps performed by the network device are executed in the method; of course, part or all of the steps executed by the network device above can also be executed in combination with the first method and the second method.

The network device shown in FIG. 8 can implement various processes related to the network device in the method embodiment shown in FIG. 3 or FIG. 5. The operations and/or functions of the various modules in the network device shown in FIG. 8 are used to implement the corresponding processes in the foregoing method embodiments. For details, please refer to the descriptions in the above method embodiments. To avoid repetition, detailed descriptions are appropriately omitted here.

Please refer to FIG. 9, which is a schematic structural diagram of another network device provided in an embodiment of the application. It may be a network device (such as a CU) in the above embodiment, and is used to implement the operation of the network device in the above embodiment.

As shown in FIG. 9, the network device includes: a processor 910, a memory 920, and an interface 930, and the processor 910, the memory 920, and the interface 930 are in signal connection.

The apparatus illustrated in FIG. 6 above may be located in the network device, and the functions of each unit may be implemented by the processor 910 calling a program stored in the memory 920. That is, the device shown in FIG. 6 above includes a memory and a processor, and the memory is used to store a program, and the program is called by the processor to execute the method in the above method embodiment. The processor here may be an integrated circuit with signal processing capability, such as a CPU. Or the functions of the above units may be realized by one or more integrated circuits configured to implement the above methods. For example: one or more ASICs, or, one or more microprocessors DSP, or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms. Or, the above implementations can be combined.

Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, this application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, this application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims

A data transmission method, characterized in that the method includes:

The communication device receives the first data packet;

The communication device determines that the transmission of the first data packet is incorrect;

The communication device performs error delivery on the first data packet.
The method according to claim 1, wherein the determining by the communication device that the transmission of the first data packet is incorrect comprises:

The communication device determines that the cyclic redundancy check CRC check of the first data packet has failed; and/or,

The communication device determines that the decoding of the first data packet fails.
The method according to claim 1 or 2, wherein the communication device is located in a network device.
The method according to claim 3, wherein the method further comprises:

The communication device sends first indication information, where the first indication information is used to indicate that the data carried by the first resource supports error delivery;

Wherein, the first data packet is carried on the first resource.
The method according to claim 4, wherein the communication device sending the first indication information comprises:

The communication device sends an uplink grant, the uplink grant is used to indicate the first resource, and the uplink grant carries the first indication information; or,

The communication device sends first configuration information, where the first configuration information is used to configure the first resource, and the first configuration information carries the first indication information; or,

The communication device sends control information, the control information is used to activate the first resource, and the control information carries the first indication information.
The method according to claim 3, wherein the method further comprises:

The communication device receives second indication information, where the second indication information is used to indicate that the first data packet supports error delivery.
The method according to claim 6, wherein the first data packet and the second indication information are carried in a first resource allocated by the communication device.
The method according to claim 1 or 2, wherein the communication device is located in a terminal device.
The method according to claim 8, wherein the first data packet is carried on a second resource;

The method further includes: the communication device receiving third indication information, where the third indication information is used to indicate that the data carried by the second resource supports error delivery.
The method according to claim 9, wherein the receiving of the third indication information by the communication device comprises:

The communication device receives first control information, where the first control information is used to schedule the second resource, and the first control information carries the third indication information; or,

The communication device receives second control information, where the second control information is used to activate the second resource, and the second control information carries the third indication information; or,

The communication device receives second configuration information, where the second configuration information is used to configure the second resource, and the second configuration information carries the third indication information.
The method according to claim 8, wherein the first data packet is carried on a second resource;

The method also includes:

The communication device receives third control information according to a preset control resource set and/or a preset search space, where the third control information is used to schedule the second resource; the preset control resource set and/or preset The data carried by the resource scheduled by the third control information carried by the search space supports error delivery; or,

The communication device receives third control information on a physical downlink control channel, where the third control information is used to schedule the second resource; the physical downlink control channel is scrambled by a preset radio network temporary identifier RNTI, and the preset It is assumed that the RNTI indicates that the data carried by the resource scheduled by the third control information carried by the physical downlink control channel supports error delivery.
The method according to any one of claims 8 to 11, wherein the method further comprises:

The communication device receives third configuration information, and the third configuration information is used to configure an error delivery function for the communication device.
The method according to any one of claims 1 to 12, wherein the error delivery of the first data packet by the communication device comprises:

The hybrid automatic repeat request HARQ entity of the communication device delivers the first data packet and fourth indication information to a demultiplexing entity, and the fourth indication information is used to indicate a transmission error of the first data packet.
The method according to claim 13, wherein the fourth indication information is used to indicate the decoding accuracy of the first data packet.
The method according to claim 13 or 14, wherein before the HARQ entity of the communication device submits the first data packet and the fourth indication information to the demultiplexing entity, the method further includes at least one of the following:

Determining, by the HARQ entity of the communication device, that the decoding accuracy rate of the first data packet is greater than a first threshold;

The HARQ entity of the communication device determines that the number of retransmissions of the first data packet is greater than a second threshold;

The HARQ entity of the communication device determines that the timer corresponding to the first data packet has expired.
The method according to any one of claims 13 to 15, wherein the method further comprises:

If the HARQ entity of the communication device receives the retransmitted data packet of the first data packet, it delivers the retransmitted data packet to the demultiplexing entity.
The method according to claim 16, wherein before the HARQ entity of the communication device submits the retransmission data packet to the demultiplexing entity, the method further comprises:

The HARQ entity of the communication device determines that the retransmission data packet is correctly transmitted.
The method according to any one of claims 13 to 17, wherein the method further comprises:

The HARQ entity of the communication device feeds back an acknowledgement reply ACK for the first data packet.
The method according to any one of claims 1 to 18, wherein the error delivery of the first data packet by the communication device comprises:

The demultiplexing entity of the communication device delivers the first data packet and fifth indication information to a radio link control RLC layer entity, and the fifth indication information is used to indicate a transmission error of the first data packet.
The method according to claim 19, wherein before the demultiplexing entity of the communication device delivers the first data packet to the RLC layer entity, the method further comprises at least one of the following:

The demultiplexing entity of the communication device parses the first data packet to obtain a logical channel identifier;

The demultiplexing entity of the communication device parses the first data packet to obtain a logical channel identifier, and all logical channels corresponding to the logical channel identifier support error delivery;

The demultiplexing entity of the communication device determines that the first data packet has not been delivered to the RLC layer entity;

The demultiplexing entity of the communication device determines that the decoding accuracy rate of the first data packet is greater than a third threshold.
The method according to any one of claims 1 to 20, wherein the method further comprises:

If the demultiplexing entity of the communication device determines that the media access control MAC control element CE is included in the first data packet, the MAC CE is applied.
The method according to claim 21, wherein before the demultiplexing entity of the communication device performs the behavior indicated by the MAC CE, the method further comprises at least one of the following:

The demultiplexing entity of the communication device parses the first data packet to obtain a logical channel identifier;

Determining that the demultiplexing entity of the communication device receives the first data packet for the first time;

The demultiplexing entity of the communication device determines that the decoding accuracy rate of the first data packet is greater than a fourth threshold.
The method according to any one of claims 19-22, wherein the method further comprises:

If the RLC layer entity of the communication device determines that the first data packet is received for the first time, it moves the window of the RLC sequence number SN.
A data transmission method, characterized in that the method includes:

The communication device forms a first data packet, and the first data packet supports error delivery;

The communication device sends the first data packet.
The method according to claim 24, wherein the first data packet supports error delivery and includes at least one of the following:

The service support to which the first data packet belongs is submitted incorrectly;

The cell transmitting the first data packet supports error delivery;

The first data packet includes data from at least one logical channel, and part or all of the at least one logical channel supports error delivery.
The method according to claim 24 or 25, wherein the communication device is located in a terminal device.
The method according to claim 26, further comprising: the communication device receiving first indication information, the first indication information being used to indicate that the data carried by the first resource supports error delivery;

The sending of the first data packet by the communication device includes: the communication device sending the first data packet on the first resource.
The method according to claim 27, wherein the receiving of the first indication information by the communication device comprises:

The communication device receives an uplink grant, the uplink grant is used to indicate the first resource, and the uplink grant carries the first indication information; or,

The communication device receives first configuration information, where the first configuration information is used to configure the first resource, and the first configuration information carries the first indication information; or,

The communication device receives control information, the control information is used to activate the first resource, and the control information carries the first indication information.
The method according to claim 26, wherein the method further comprises:

The communication device sends second indication information, where the second indication information is used to indicate that the first data packet supports error delivery.
The method according to claim 29, wherein the second indication information is used to indicate that the first data packet supports error delivery, comprising:

The second indication information is used to indicate that the first data packet supports error delivery when the first data packet meets at least one of the following:

The decoding accuracy rate of the first data packet is greater than a first threshold;

The number of retransmissions of the first data packet is greater than a second threshold;

The timer corresponding to the first data packet expires.
The method according to claim 29 or 30, wherein the sending of the first data packet and the second indication information by the communication device comprises:

The communication device sends the first data packet and the second indication information on the first resource.
The method according to claim 31, wherein the sending of the first data packet and the second indication information by the communication device on a first resource comprises:

The communication device punctures the first data packet, and sends the punctured first data packet and the second indication information on the first resource; or,

The communication device performs joint coding on the first data packet and the second indication information, and sends the joint coding information on the first resource.
The method according to any one of claims 26 to 32, wherein the method further comprises:

The communication device receives second configuration information, where the second configuration information is used to indicate whether one or more logical channels support error delivery.
The method according to claim 24 or 25, wherein the communication device is located in a network device.
The method according to claim 34, wherein the first data packet is carried on a second resource;

The method also includes:

The communication device sends third indication information, where the third indication information is used to indicate that the data carried by the second resource supports error delivery.
The method according to claim 34 or 35, wherein the method further comprises:

Receive fourth indication information from the centralized unit CU, where the fourth indication information is used to indicate whether one or more logical channels support error delivery.
The method according to any one of claims 24 to 36, wherein the communication device sending the first data packet comprises:

The MAC layer entity of the communication device delivers the first data packet and fifth indication information to the physical layer entity, where the fifth indication information is used to indicate that the service data of the first data packet adapts to the SDAP header and packet The position of at least one of the data convergence layer protocol PDCP header, RLC header, and MAC header in the first data packet;

The physical layer entity of the communication device sends the first data packet according to the fifth instruction information.
The method according to any one of claims 24 to 37, wherein the first data packet includes a PDCP service data unit SDU or a PDCP SDU segment.
A communication system, characterized in that the communication system includes a network device and a core network device, wherein the network device is used to execute any one of claims 1 to 7, 13 to 25, and 34 to 38. Methods.
The communication system according to claim 39, wherein the core network device is configured to send service information of one or more services to the network device;

Wherein, the one or more services include a first service, and the service information of the first service includes at least one of the following:

The delay budget of the first service;

An error delivery instruction of the first service, where the error delivery instruction of the first service is used to indicate whether the first service supports error delivery;

An error delivery instruction of one or more data streams corresponding to the first service, and the error delivery instruction of the data stream is used to indicate whether the data stream supports error delivery.
A communication device, characterized by comprising a unit for executing each step of the method according to any one of claims 1 to 38.
A communication device, which is characterized by comprising at least one processor and an interface circuit, wherein the at least one processor is used to communicate with other devices through the interface circuit, and executes as described in any one of claims 1 to 38. The method described.
A communication device, characterized by comprising a processor, configured to call a program stored in a memory to execute the method according to any one of claims 1 to 38.
A computer-readable storage medium, characterized by comprising a program, and when the program is executed by a processor, the method according to any one of claims 1 to 38 is executed.