CN117728918A

CN117728918A - Data transmission method and device

Info

Publication number: CN117728918A
Application number: CN202211103856.2A
Authority: CN
Inventors: 李建锋; 戴喜增
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2024-03-19

Abstract

The embodiment of the application provides a data transmission method and device, which can be applied to XR service, and the data transmission method comprises the following steps: determining first CRC information of each data block in one or more data blocks corresponding to the PDU set according to the data accuracy of the PDU set and the channel environment; first CRC information is sent for each of one or more data blocks. Therefore, the method can adjust the first CRC information of the data block in the physical layer, thereby being beneficial to realizing the hierarchical error control capability in the physical layer; in addition, the method can timely acquire the channel environment at the physical layer to determine the first CRC information, and is beneficial to enabling the time delay of data transmission in XR service to meet the time delay requirement of the XR service.

Description

Data transmission method and device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background

Extended reality (XR) is a technology that can combine real and virtual environments and allow human-machine interaction. In XR, the importance, packet loss tolerance or priority of different PDU sets may be different for different sets of protocol data units (protocol data unit, PDU sets) in the same data stream. For example, some of the PDU sets from the same data stream carry some critical information, and then these PDU sets carrying critical information are more important than PDU sets not carrying critical information. For PDU sets with different importance, packet loss tolerance or priority, different service qualities (quality of service, qoS), i.e. differentiated QoS, need to be provided, so as to realize hierarchical error control capability.

Currently, differentiated QoS may be implemented by higher layers, such as a service data adaptation protocol (service data adaptation protocol, SDAP) entity or a packet data convergence protocol (packet data convergence protocol, PDCP), by offloading PDU sets in the data flow, such as to different PDCP entities or RLC entities. However, the higher layer has larger perceived delay to the physical channel environment, so that the shunting processing brings larger delay, and further, the delay of data transmission in the XR service is larger.

Disclosure of Invention

The embodiment of the application provides a data transmission method and device, which have hierarchical error control capability and are beneficial to enabling the time delay of data transmission in XR service to meet the time delay requirement of the XR service.

In a first aspect, the present application provides a data transmission method, where the execution body of the method may be a network device or a chip applied in the network device. The following describes an example in which the execution subject is a network device. The method is applied to extended reality (XR) business. The method comprises the following steps: the network device determines first cyclic redundancy check (cyclic redundancy check, CRC) information of each of one or more data blocks corresponding to the PDU set according to the data accuracy of the PDU set and the channel environment. The network device transmits the first CRC information for each of the one or more data blocks.

It can be seen that the method can determine first CRC information for a data block in a physical layer, the first CRC information being determined at the physical layer based on a data accuracy of a set of PDUs and a channel environment. The network device can timely acquire the channel environment at the physical layer to determine the first CRC information, which is beneficial to enabling the time delay of data transmission in XR service to meet the time delay requirement of the XR service. And the method can adjust the first CRC information of the data block in the physical layer based on the data accuracy of the PDU set and the channel environment, can control the data transmission accuracy, is beneficial to realizing the hierarchical error control capability in the physical layer, and is further beneficial to reducing the data transmission rate requirement of XR service and improving the service throughput.

In an alternative embodiment, the first CRC information is a CRC length. Therefore, the method can control the data transmission accuracy by adjusting the CRC length in the physical layer, thereby realizing the hierarchical error control capability in the physical layer, being beneficial to reducing the data transmission rate requirement of XR service and improving the service throughput.

In an alternative embodiment, the PDU set is data in downlink XR service, and the first CRC information is a CRC check length. Therefore, the method can control the data transmission accuracy by adjusting the CRC length in the physical layer, thereby realizing the hierarchical error control capability in the physical layer, being beneficial to reducing the data transmission rate requirement of XR service and improving the service throughput.

In an alternative embodiment, the CRC lengths of the multiple data blocks corresponding to the PDU set are all the same, partially the same, or all different; alternatively, the CRC check lengths of the multiple data blocks corresponding to the PDU set are all the same, partially the same, or all different. When the CRC lengths/CRC check lengths of the plurality of data blocks are all the same, the method is beneficial to simplifying the determination mode of the CRC lengths/CRC check lengths of the plurality of data blocks. When the CRC lengths/CRC check lengths of the plurality of data blocks are all different, the method for determining the CRC lengths/CRC check lengths of the plurality of data blocks is more flexible. When the CRC length/CRC check length portions of the plurality of data blocks are identical, the determination mode of the CRC length/CRC check length of the plurality of data blocks is more flexible compared with the case that the CRC length/CRC check length of the plurality of data blocks are all identical, and is simpler compared with the case that the CRC length/CRC check length of the plurality of data blocks are all different.

In an alternative embodiment, the network device sends first CRC information for each of one or more data blocks, including: the network device transmits one or more downlink control information (downlink control information, DCI) indicating first CRC information for each of the one or more data blocks. The delay of DCI transmission is smaller, so that the delay for the terminal equipment to acquire the first CRC information is smaller. In addition, this embodiment may indicate the first CRC information of each of the one or more data blocks through one or more DCIs, which is more flexible than a manner in which information can be indicated using only one DCI.

In an alternative embodiment, the CRC lengths of the data blocks indicated by any one of the plurality of DCIs are all the same, partially the same, or all different; alternatively, the CRC check lengths of the data blocks indicated by any one of the plurality of DCIs are all the same, partially the same, or all different. It can be seen that one DCI may be used to indicate the CRC lengths of all the same, partially the same or all different data blocks, or one DCI may be used to indicate the CRC check lengths of all the same, partially the same or all different data blocks.

When the CRC length/CRC check length of the data block indicated by any one DCI is the same, it is beneficial to simplify the manner of indicating the CRC length/CRC check length of the data block. When the CRC length/CRC check length of any one DCI indicated data block is all different, the indication mode of the CRC length/CRC check length of the data block is more flexible. When the CRC length/CRC check length of the data block indicated by any one DCI is the same, the indication mode of the CRC length/CRC check length of the data block is more flexible compared with the case that the CRC length/CRC check length of the data block indicated by any one DCI is the same, and is simpler compared with the case that the CRC length/CRC check length of the data block indicated by any one DCI is different.

In an alternative embodiment, the method further comprises: the network device adds a CRC corresponding to the CRC length for each of one or more data blocks corresponding to the PDU set. The network equipment sends one or more data blocks corresponding to the PDU set; the set of PDUs is data in the downlink XR traffic.

The embodiment can be applied to the situation that the PDU set is data in downlink XR service and the first CRC information is CRC length, the CRC length of the CRC added by each data block sent by the network equipment is determined based on the data accuracy and the channel environment in the physical layer, so that the dynamic control of the data transmission accuracy is facilitated, the hierarchical error control capability can be realized in the physical layer, and the time delay requirement of the XR service can be met.

In an alternative embodiment, the method further comprises: the network equipment receives one or more data blocks corresponding to the PDU set; the set of PDUs is data in the uplink XR traffic. The network device uses the CRC corresponding to the CRC length to check each of the one or more data blocks.

The embodiment can be applied to the situation that the PDU set is data in uplink XR service and the first CRC information is CRC length, the CRC length of CRC added by each data block received by the network equipment is determined based on the data accuracy and the channel environment in the physical layer, and the network equipment adopts the CRC data block corresponding to the CRC length, so that the dynamic control of the data transmission accuracy can be realized, the hierarchical error control capability can be realized in the physical layer, and the time delay requirement of XR service can be met.

In an alternative embodiment, the method further comprises: the network equipment receives the data accuracy rate of the PDU set; the set of PDUs is data in the uplink XR traffic. The embodiment is beneficial to that in the case that the PDU set is data in uplink XR service, the network equipment can determine the first CRC information of each data block corresponding to the PDU set based on the data accuracy of the received PDU set, so that the data transmission accuracy is dynamically controlled, the hierarchical error control capability can be realized in a physical layer, the data transmission rate requirement of the XR service is reduced, and the service throughput is improved.

In an alternative embodiment, the data accuracy corresponding to the set of PDUs is related to one or more of the following: priority of the set of PDUs, importance, tolerated packet loss ratio, disallowed packet loss ratio or traffic type. It can be seen that a data accuracy rate corresponding to a set of PDUs can be determined based on one or more of the foregoing. The data accuracy of the PDU sets may be different when one or more of the foregoing different PDU sets are different, and the first CRC information of the data blocks corresponding to the PDU sets may be different based on the different data accuracy, which is beneficial to realizing control of the data transmission accuracy of different proportions, further realizing hierarchical error control capability, being beneficial to reducing the data transmission rate requirement of XR service, and improving service throughput.

In an alternative embodiment, each of one or more data blocks corresponding to the PDU set is respectively added with a corresponding service label and/or number. The data blocks may be identified by a traffic label and/or number, which facilitates the network device in determining the first CRC information for each data block and transmitting the first CRC information for each data block, and the different data blocks may be distinguished by the traffic label and/or number.

In a second aspect, the present application provides a data transmission method, where the method is applied to XR service, and the execution body of the method may be a terminal device, or may be a chip applied to the terminal device. The following describes an example in which the execution subject is a terminal device. The method comprises the following steps: the terminal equipment receives first CRC information of each data block in one or more data blocks; the one or more data blocks are one or more data blocks corresponding to a set of PDUs; the first CRC information for each data block relates to the data accuracy and channel environment of the PDU set. The terminal equipment receives one or more data blocks, and each data block in the one or more data blocks is checked by adopting CRC corresponding to the first CRC information; or the terminal equipment sends one or more data blocks, wherein each data block in the one or more data blocks is added with CRC corresponding to the first CRC information.

The first CRC information received by the terminal equipment is determined on the physical layer based on the data accuracy of the PDU set and the channel environment, and the channel environment can be timely acquired on the physical layer, so that the time delay of data transmission in XR service can meet the time delay requirement of the XR service. In addition, CRC corresponding to the first CRC information is added to each data block corresponding to the PDU set, or the received data block is checked by adopting the CRC corresponding to the first CRC information, so that the data transmission accuracy can be controlled, the hierarchical error control capability is realized in the physical layer, the data transmission rate requirement of XR service is reduced, and the service throughput is improved.

In an alternative embodiment, the first CRC information is a CRC length. Therefore, the method can control the data transmission accuracy of different proportions by adjusting the CRC length in the physical layer, thereby realizing the hierarchical error control capability in the physical layer, being beneficial to reducing the data transmission rate requirement of XR service and improving the service throughput.

In an alternative embodiment, the PDU set is data in downlink XR service, and the first CRC information is a CRC check length. Therefore, the method can control the data transmission accuracy of different proportions by adjusting the CRC length in the physical layer, thereby realizing the hierarchical error control capability in the physical layer, being beneficial to reducing the data transmission rate requirement of XR service and improving the service throughput.

In an alternative embodiment, the terminal device receives first CRC information for each of one or more data blocks, including: the terminal device receives one or more DCIs for indicating first CRC information for each of the one or more data blocks. Due to the fact that the time delay of DCI transmission is smaller, the time delay for the terminal equipment to acquire the first CRC information is smaller. In addition, this embodiment indicates the first CRC information of each of one or more data blocks through a plurality of DCIs, which is more flexible than a manner of indicating information using only one DCI.

In an alternative embodiment, the method further comprises: the terminal equipment sends the data accuracy of the PDU set; the set of PDUs is data in the uplink XR traffic. Therefore, in the case that the PDU set is data in the uplink XR service, the terminal device can inform the network device of the data accuracy of the PDU set, which is beneficial to the network device to determine the first CRC information of each data block corresponding to the PDU set based on the received data accuracy of the PDU set, thereby realizing dynamic control of the data transmission accuracy, further realizing hierarchical error control capability in the physical layer and meeting the time delay requirement of the XR service.

In an alternative embodiment, the data accuracy of the set of PDUs is related to one or more of the following: priority of the set of PDUs, importance, tolerated packet loss ratio, disallowed packet loss ratio or traffic type. It can be seen that a data accuracy rate corresponding to a set of PDUs can be determined based on one or more of the foregoing. The data accuracy of the PDU sets may be different when one or more of the foregoing different PDU sets are different, and the first CRC information of the data blocks corresponding to the PDU sets may be different based on the different data accuracy, which is beneficial to realizing control of the data transmission accuracy of different proportions, further realizing hierarchical error control capability, being beneficial to reducing the data transmission rate requirement of XR service, and improving service throughput.

In a third aspect, the present application provides a data transmission method, where the method is applied to XR service, and an execution body of the method may be a network device or a chip applied to the network device. The following describes an example in which the execution subject is a network device. The method comprises the following steps: the network equipment determines the CRC length of each data block in one or more data blocks corresponding to the PDU set according to the data accuracy of the PDU set and the channel environment; the set of PDUs is data in the uplink XR traffic. The network device receives one or more data blocks corresponding to the PDU set, and checks each data block in the one or more data blocks by using a CRC corresponding to the CRC length.

It can be seen that, in the case that the PDU set is data in the uplink XR service, the network device can adjust the CRC check length adopted when checking the data block in the physical layer, where the CRC check length is determined according to the data accuracy of the PDU set and the channel environment, and the network device can timely acquire the channel environment in the physical layer, so that the delay of data transmission in the XR service can meet the XR service delay requirement. In addition, the method can control the data transmission accuracy by adjusting the CRC length, realizes the hierarchical error control capability in the physical layer, is beneficial to reducing the data transmission rate requirement of XR service and improves the service throughput.

In an alternative embodiment, the network device does not transmit the CRC check length for each of the one or more data blocks corresponding to the PDU set. This embodiment can reduce signaling overhead.

In an alternative embodiment, the CRC check lengths of the multiple data blocks corresponding to the PDU set are all the same, partially the same, or all different. When the CRC check lengths of the plurality of data blocks are all the same, the method is beneficial to simplifying the determination mode of the CRC check lengths of the plurality of data blocks. When the CRC check lengths of the plurality of data blocks are all different, the method for determining the CRC check lengths of the plurality of data blocks is more flexible. When the CRC check lengths of the plurality of data blocks are partially identical, the determination mode of the CRC check lengths of the plurality of data blocks is more flexible than when the CRC check lengths of the plurality of data blocks are all identical, and is simpler than when the CRC check lengths of the plurality of data blocks are all different.

In an alternative embodiment, the method further comprises: the network device receives the data accuracy of the set of PDUs. The embodiment is beneficial to the network equipment to determine the first CRC information of each data block corresponding to the PDU set based on the data accuracy of the received PDU set, thereby realizing dynamic control of the data transmission accuracy, further realizing hierarchical error control capability at a physical layer, being beneficial to reducing the data transmission rate requirement of XR service and improving the service throughput.

In an alternative embodiment, each of one or more data blocks corresponding to the PDU set is respectively added with a corresponding service label and/or number. It can be seen that the data blocks may be identified by a traffic label and/or number, which facilitates the network device in determining the first CRC information for each data block and transmitting the first CRC information for each data block to distinguish between different data blocks by the traffic label and/or number.

In a fourth aspect, the present application provides a data transmission system, where the data transmission system is applied to XR services, and the data transmission system includes a network device and a terminal device.

In one possible design, the network device is configured to determine, according to a data accuracy of the PDU set and a channel environment, first CRC information for each of one or more data blocks corresponding to the PDU set. The network device is further configured to transmit the first CRC information for each of the one or more data blocks.

The terminal device is configured to receive first CRC information for each of the one or more data blocks. The terminal device is further configured to receive one or more data blocks, and check each data block in the one or more data blocks by using a CRC corresponding to the first CRC information; or the terminal device is further configured to send one or more data blocks, where each data block in the one or more data blocks is added with a CRC corresponding to the first CRC information.

The network device in the data transmission system may be configured to perform the corresponding functions in the method example of the first aspect, and the terminal device may be configured to perform the corresponding functions in the method example of the second aspect, which are specifically referred to in the method example and are not described in detail herein.

In another possible design, the network device is configured to determine, according to the data accuracy of the PDU set and the channel environment, a CRC check length of each of one or more data blocks corresponding to the PDU set; the set of PDUs is data in the uplink XR traffic.

The terminal device is configured to send one or more data blocks corresponding to the PDU set, where each data block in the one or more data blocks corresponding to the PDU set is added with a 16-bit or 24-bit CRC.

The network device is further configured to receive one or more data blocks corresponding to the PDU set, and check each of the one or more data blocks with a CRC corresponding to a CRC check length.

The network device in the data transmission system may be configured to perform the corresponding functions in the method example of the third aspect, which is specifically referred to in the method example and will not be described herein.

In a fifth aspect, a communication device is provided, and advantageous effects may be seen in the description of the first aspect and are not repeated here. The communication device has the functionality to implement the actions in the method example of the first aspect described above. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the communication device includes: the processing unit is configured to determine first cyclic redundancy check (cyclic redundancy check, CRC) information of each of one or more data blocks corresponding to the PDU set according to a data accuracy rate and a channel environment of the PDU set. The communication unit is configured to transmit the first CRC information for each of the one or more data blocks.

These units may perform the corresponding functions in the method examples of the first aspect, which are specifically referred to in the detailed description of the method examples and are not described herein.

In a sixth aspect, a communication device is provided, and advantageous effects may be seen in the description of the second aspect and are not repeated here. The communication device has the functionality to implement the behavior in the method example of the second aspect described above. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the communication device includes: the communication unit is used for receiving first CRC information of each data block in the one or more data blocks; the one or more data blocks are one or more data blocks corresponding to a set of PDUs; the first CRC information for each data block relates to the data accuracy and channel environment of the PDU set. The communication unit is further used for receiving one or more data blocks, and the processing unit is used for checking each data block in the one or more data blocks by adopting CRC corresponding to the first CRC information; or the communication unit is further configured to send one or more data blocks, where each data block in the one or more data blocks is added with a CRC corresponding to the first CRC information.

These units may perform the corresponding functions in the method examples of the second aspect described above, and are specifically referred to in the detailed description of the method examples, which are not described herein.

In a seventh aspect, a communication device is provided, and advantageous effects may be seen from the description of the third aspect, which is not repeated here. The communication device has the functionality to implement the behavior in the method example of the third aspect described above. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above.

In one possible design, the communication device includes: the processing unit is used for determining the CRC length of each data block in one or more data blocks corresponding to the PDU set according to the data accuracy of the PDU set and the channel environment; the set of PDUs is data in the uplink XR traffic. The communication unit is used for receiving one or more data blocks corresponding to the PDU set. The processing unit is further configured to check each of the one or more data blocks using a CRC corresponding to the CRC check length.

These units may perform the corresponding functions in the method examples of the third aspect, which are specifically referred to in the method examples and are not described in detail herein.

In an eighth aspect, a communication apparatus is provided, where the communication apparatus may be a network device in an embodiment of the method described above, or a chip provided in the network device. The communication device comprises a communication interface and a processor, and optionally a memory. The memory is used for storing a computer program or instructions, and the processor is coupled with the memory and the communication interface, when the processor executes the computer program or instructions, the communication device executes the method executed by the network device in the method embodiment.

In a ninth aspect, a communication apparatus is provided, where the communication apparatus may be a terminal device in an embodiment of the method described above, or a chip provided in the terminal device. The communication device comprises a communication interface and a processor, and optionally a memory. The memory is used for storing a computer program or instructions, and the processor is coupled with the memory and the communication interface, when the processor executes the computer program or instructions, the communication device executes the method executed by the terminal device in the method embodiment.

In a tenth aspect, there is provided a computer program product comprising: computer program code which, when executed, causes the method performed by the network device in the above aspects to be performed.

In an eleventh aspect, there is provided a computer program product comprising: computer program code which, when run, causes the method performed by the terminal device in the above aspects to be performed.

In a twelfth aspect, the present application provides a chip system, where the chip system includes a processor, and the processor is configured to implement the functions of the network device in the methods in the above aspects. In one possible design, the chip system further includes a memory for holding program instructions and/or data. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In a thirteenth aspect, the present application provides a chip system, where the chip system includes a processor, and the processor is configured to implement a function of a terminal device in the methods in the above aspects. In one possible design, the chip system further includes a memory for holding program instructions and/or data. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

In a fourteenth aspect, the present application provides a computer readable storage medium storing a computer program which, when executed, implements the method performed by the network device in the above aspects.

In a fifteenth aspect, the present application provides a computer readable storage medium storing a computer program which, when executed, implements the method performed by the terminal device in the above aspects.

Drawings

Fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another communication system according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of yet another communication system provided in an embodiment of the present application;

fig. 4 is a schematic diagram of a TB divided into CBs according to an embodiment of the present application;

fig. 5 is a schematic diagram of a split architecture of a multiple PDCP entity according to an embodiment of the present application;

fig. 6 is a schematic diagram of a split architecture of multiple RLC entities provided in an embodiment of the present application;

fig. 7 is a schematic flow chart of a data transmission method according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a fixed CRC length and a hybrid CRC length provided by an embodiment of the application;

fig. 9 is a schematic diagram of data accuracy transmission of a PDU set according to an embodiment of the present application;

fig. 10 is a schematic diagram of another data transmission method according to an embodiment of the present application;

FIG. 11 is a schematic diagram of another data transmission method according to an embodiment of the present disclosure;

fig. 12 is a schematic diagram of another data transmission method according to an embodiment of the present application;

fig. 13 is a schematic diagram of another data transmission method according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described below with reference to the accompanying drawings in the embodiments of the present application.

First, in order to better understand the data transmission method disclosed in the embodiments of the present application, a communication system to which the embodiments of the present application are applicable will be described.

The technical scheme of the embodiment of the application can be applied to various communication systems. For example, the global system for mobile communications, the long term evolution (long term evolution, LTE) system, the universal mobile telecommunications system, the fourth Generation mobile telecommunications technology (4G) system, the next Generation radio access network (next-Generation radio access network, NG-RAN), the New Radio (NR) system (i.e., the 5G system), and with the development of the communication technology, the technical solutions of the embodiments of the present application may also be used in the subsequently evolved communication systems, such as the 6G system, the 7G system, and so on.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application. The communication system may include, but is not limited to, a network device and a terminal device. The communication system may also include channels between the network devices and the terminal devices for transmitting data, such as transmission media, e.g., optical fibers, cables, or the atmosphere. The number and form of the devices shown in fig. 1 are used for illustration and not to limit the embodiments of the present application, and in practical applications, two or more network devices and two or more terminal devices may be included. The communication system shown in fig. 1 is illustrated by way of example with one network device and one terminal device. The network device in fig. 1 is exemplified by a base station, and the terminal device is exemplified by a mobile phone.

In the embodiment of the present application, the network device may be a device with a wireless transceiver function or a chip that may be disposed on the device, where the network device includes, but is not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a network device controller (base station controller, BSC), a network device transceiver station (base transceiver station, BTS), a home network device (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (wireless fidelity, WIFI) system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission and reception point, TRP or transmission point, TP), etc., may be a device used in a 4G, 5G, or even 6G system, such as an evolved base station (NodeB or eNB-NodeB, evolutional Node B) in LTE, a next generation LTE (next-generation eNodeB, ng-eNB), a next generation base station (network Node B, gbb or gNB), a transceiver point, or a transmission point (NB), or may also be a transmission point (access point or TP), or may be a transmission point (bbnb) or a distributed network unit (pdu), such as a base band Node B or a distributed network unit (base band), a distributed Node, a network unit (pdu), or a distributed network unit (femto unit), a distributed Node, or a distributed Node (network unit, a radio unit, a network unit, a distributed Node, or a distributed Node unit (pdu, a network unit). Wherein, the base station may be: macro base station, micro base station, pico base station, small station, relay station, or balloon station, etc.

In this embodiment of the present application, the terminal device may also be referred to as a User Equipment (UE), a terminal, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a user agent, or a user apparatus, and may be applied to a 4G, 5G, or even 6G system, etc. The terminal device in this embodiment of the present application may be a joint device that performs digital signal transmission and reception on a common telephone line, and may also be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a Mixed Reality (MR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), an RSU of the aforementioned wireless terminal type, or the like.

Referring to fig. 2, fig. 2 is a schematic structural diagram of another communication system according to an embodiment of the present application. The communication system comprises a Core Network (CN) and a radio access network (radio access network, RAN). Wherein network equipment (e.g., base stations) in the RAN may include baseband devices and radio frequency devices. The baseband device may be implemented by one or more nodes, and the radio frequency device may be implemented independently from the baseband device, may be integrated into the baseband device, or may be partially integrated into the baseband device. The network devices in the RAN may include a Centralized Unit (CU) and a Distributed Unit (DU), and a plurality of DUs may be centrally controlled by one CU. The CU and the DU may be divided according to the protocol layer functions of the wireless network provided therein, for example, functions of a packet data convergence protocol (packet data convergence protocol, PDCP) layer and above protocol layers are provided at the CU; the functions of protocol layers below PDCP, such as a radio link control (radio link control, RLC) layer and a medium access control (medium access control, MAC) layer, etc., are provided in the DUs. It should be noted that this division of protocol layers is only an example, and may be divided at other protocol layers. The radio frequency device can be remote, not placed in the DU, integrated in the DU, or partially remote and partially integrated in the DU, and the application is not limited in any way.

Referring to fig. 3, fig. 3 is a schematic structural diagram of another communication system according to an embodiment of the present application. With respect to the architecture shown in fig. 2, the Control Plane (CP) and the User Plane (UP) of the CU may also be implemented by separating the control plane CU entity (CU-CP entity) and the user plane CU entity (CU-UP entity) into different entities. In this architecture, the signaling generated by the CU may be transmitted to the terminal device through a DU, or the signaling generated by the terminal device may be transmitted to the CU through a DU. The DU may be passed through to the terminal device or CU directly through protocol layer encapsulation without parsing the signaling. In this architecture, the CU may be divided into network devices on the RAN side, or may be divided into network devices on the CN side, which is not limited in this application.

In order to facilitate an understanding of the embodiments disclosed herein, the following two descriptions are provided.

(1) In the embodiments disclosed in the present application, the scenario is described by taking the scenario of an NR network in a wireless communication network as an example, and it should be noted that the schemes in the embodiments disclosed in the present application may also be applied to other wireless communication networks, and the corresponding names may also be replaced by names of corresponding functions in other wireless communication networks.

(2) Embodiments of the present disclosure will present various aspects, embodiments, or features of the present disclosure around a system comprising a plurality of devices, components, modules, etc. It is to be understood and appreciated that the various systems may include additional devices, components, modules, etc. and/or may not include all of the devices, components, modules etc. discussed in connection with the figures. Furthermore, combinations of these schemes may also be used.

Next, related concepts related to the embodiments of the present application will be briefly described.

1. Augmented reality (XR)

XR is a technology that combines real and virtual environments and allows human-machine interaction, which can be calculated by computer technology and wearable devices. "X" in "XR" represents a variable, which may be present or future spatial computing techniques. XR includes AR, MR, VR, and mixtures of any one or more of AR, MR, and VR.

AR refers to a technology that allows virtual world on a screen to interact with real world scenes by combining image analysis technology through the position and angle of camera images.

VR is a technology that can generate a virtual world of a three-dimensional space using computer simulation and can provide a user with sensory simulation about vision, etc., which can make the user feel as if they were in the scene, and can observe things in the three-dimensional space instantaneously and without limitation. In VR, when the user moves the position, the computer can immediately perform complex operations to return the accurate three-dimensional world image to generate a realistic sensation.

MR is a technology that can create new visual environments in conjunction with the real and virtual worlds, and that both physical entities and digital objects coexist and can interact in real time to simulate real objects. Reality, augmented virtual, and virtual reality technologies are mixed in MR.

2. User plane protocol layering

The user plane protocol of the radio access network may be classified into a service data adaptation protocol (service data adaptation protocol, SDAP) layer, a PDCP layer, an RLC layer, a MAC layer, and a physical layer (PHY), and functions of the corresponding protocol layers are performed by the SDAP entity, the PDCP entity, the RLC entity, the MAC entity, and the PHY entity, respectively. These entities are explained below.

The SDAP entity can be responsible for mapping QoS bearers to radio bearers according to quality of service (quality of service, qoS) requirements. The SDAP layer does not exist in the user plane protocol of LTE, and the SDAP layer exists in the user plane protocol of NR. In NR, the SDAP entity can be used for new QoS treatment when connecting to the 5G core network.

The PDCP entity may implement network protocol (internet protocol, IP) header compression, ciphering, and integrity protection. The PDCP entity may also handle retransmissions, sequential delivery, and de-duplication at the time of handover. In addition, for dual connectivity with bearer separation, the PDCP entity may also provide routing and duplication, one PDCP entity may be configured for each radio bearer of the terminal.

The RLC entity may be responsible for data segmentation and retransmission. The RLC entity may provide services to the PDCP entity in the form of an RLC channel. Each RLC channel (for each radio bearer) configures one RLC entity for each terminal. Compared with LTE, the RLC entity in NR does not support data in-sequence delivery to a higher protocol layer, so that time delay can be reduced.

The MAC entity may be responsible for multiplexing, retransmission, and scheduling related functions of the channel logic. Wherein the scheduling functions for uplink and downlink may be implemented by MAC entities in the gNB. In addition, the MAC entity may provide services to the RLC entity in the form of logical channels.

The PHY entity may be responsible for codec, modulation, demodulation, multi-antenna mapping, and other typical physical layer functions.

3. Cyclic redundancy check (cyclic redundancy check, CRC)

The CRC is an error check code that helps the receiving end to detect whether the decoded data block has errors. One way is that the transmitting end can adopt a certain calculation mode to determine a CRC for a data block when the physical layer carries out channel coding, and the determined CRC is added to the tail part of the data block for transmission; after the receiving end receives the data block added with the CRC, the receiving end can calculate the received data block in the same calculation mode, and if the calculation result of the receiving end is inconsistent with the received CRC, the receiving end can indicate that the received data block has errors. If an error is detected in the data block, the system may activate a retransmission request by means of a hybrid automatic retransmission request (hybrid automatic repeat request, HARQ).

The CRC length of a data block refers to the length of the CRC that the sender adds to the end of the data block. For example, the transmitting end adds a 16-bit (bit) CRC at the end of the data block, and then the CRC length of the data block is 16 bits.

The CRC check length of a data block refers to the length of CRC used by the receiving end to check the received data block. The CRC check length is less than or equal to the CRC length. For example, the CRC length of a data block is 16 bits and the CRC check length is 10 bits. Then, after receiving the data block added with the 16-bit CRC, the receiving end can calculate the data block to obtain a 16-bit check result, and then compare the first 10 bits of the 16-bit with the first 10 bits of the 16-bit CRC added by the data block; either the last 10 bits of the 16 bits are compared with the last 10 bits in the 16bit CRC appended to the data block or the middle 10 bits of the 16 bits are compared with the corresponding 10 bits in the 16bit CRC appended to the data block. If the comparison results are inconsistent, the received data block can be indicated to have errors, so that the errors possibly occurring after the data block is transmitted are checked.

In addition, in the embodiment of the present application, the units of the CRC length and the CRC check length may be bits, and the like, and the embodiment of the present application uses bits as an example to describe the units of the CRC length and the CRC check length.

In the embodiment of the present application, the data block may be a Transport Block (TB) or a Code Block (CB).

4. Protocol data unit (protocol data unit, PDU) set (i.e. PDU set), TB and CB

One PDU set may correspond to one or more data blocks, which may be TBs or CBs. Where TB and CB are data units of a physical layer.

CB may be obtained by segmenting TB. In NR, a low density parity check (low density parity check, LDPC) encoder supports a certain code block length, and the maximum length that can be supported for the case of base fig. 1 (base graph 1) is 8424 bits; the maximum length that can be supported for the case of the base fig. 2 is 3840 bits. When the total length of the TB and the CRC added by the TB exceeds the supportable maximum length, the TB needs to be segmented, and the segmentation process can obtain a plurality of CBs. Specifically, referring to fig. 4, a TB and a CRC added by the TB may be cut into several CBs of the same length; in fig. 4, cutting into 3 CBs is taken as an example. In addition, a CRC may be added for each CB obtained after segmentation, where the CRC length of each CB may be the same as the CRC length of the TB before segmentation, and the CRC added by each CB may be used to process Code Block Group (CBG) level retransmission.

In XR, for a data packet (PDU set) with different characteristics such as importance, packet loss tolerance, or priority, different QoS, i.e. differentiated QoS, needs to be provided, which may also be referred to as a hierarchical error control capability.

After the IP data stream is transmitted to the network, the network may classify the data packets in the IP data stream according to one or more of the following characteristics: important/unimportant, discardable/non-discardable, I-frame message/P-frame message, base frame/enhancement frame, etc. And, the higher layer can shunt different kinds of data messages to different transmission paths/processing modules/processing units/protocol entities/Data Radio Bearers (DRBs)/logical channels. Specifically, as shown in fig. 5, the SDAP entity may shunt data packets of different categories to different PDCP entities based on the physical channel environment, and be processed by the different PDCP entities and RLC entities, respectively. Alternatively, as shown in fig. 6, the PDCP entity may shunt data packets of different categories to different RLC entities based on a physical channel environment, and the data packets may be processed by the different RLC entities, respectively.

It can be seen that the more the classification, the finer the QoS control, the more PDCP entities and RLC entities are required to process the data packets of different classes, and the greater the processing overhead of the network. In addition, when the higher layer performs differentiated QoS, there is a delay perceived on the change of the physical channel environment, so that the differentiated QoS cannot be performed in real time in combination with the physical channel environment. This approach can lead to a larger delay for data transmission in XR traffic due to the larger perceived delay of the physical channel environment by the higher layers.

Currently, a CRC is also added to each data block at the physical layer, and the CRC length of the data block depends on the length of the data block. If the length of the data block is larger than 3824 bits, the CRC length of the data block is 24 bits; if the length of the data block is less than 3824 bits, the CRC length of the data block is 16 bits.

Assuming that the CRC length is Nbit, when the receiving end performs a check on the received data block based on the CRC, the probability P of error of the data block, that is, the error detection capability P, can be detected, which satisfies the following formula (1):

based on equation (1), an error detection capability of nearly 100% can be achieved at a CRC length of 16 bits or 24 bits.

The embodiment of the application provides a data transmission method which can be applied to XR service, and can determine first CRC information of each data block in one or more data blocks corresponding to a PDU set according to the data accuracy of the PDU set and the channel environment; first CRC information is sent for each of one or more data blocks. The method can adjust the first CRC information of the data block in the physical layer, can dynamically control the data transmission accuracy, and is beneficial to realizing the hierarchical error control capability in the physical layer. And the channel environment can be timely acquired in the physical layer, so that the method determines that the time delay of the first CRC information is smaller, and is beneficial to enabling the time delay of data transmission in XR service to meet the time delay requirement of the XR service.

Embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 7, fig. 7 is a flow chart of a data transmission method according to an embodiment of the present application, where the data transmission method can be applied to XR service. The data transmission method is described from the point of interaction of the network equipment and the terminal equipment, and comprises the following steps:

s101, the network equipment determines first CRC information of each data block in one or more data blocks corresponding to the PDU set according to the data accuracy rate and the channel environment of the PDU set.

In an alternative embodiment, the first CRC information may be a CRC length or a CRC check length. In the following, the specific manner in which the network device determines the first CRC information of each of one or more data blocks corresponding to the PDU set according to the data accuracy of the PDU set and the channel environment when the first CRC information is the CRC length or the CRC check length is described in embodiments 1.1 and 1.2, respectively.

In embodiment 1.1, when the first CRC information is a CRC length, step S101 may include: the network equipment adjusts the data accuracy of the PDU set according to the channel environment; determining the data accuracy of each data block in one or more data blocks corresponding to the PDU set according to the adjusted data accuracy; and determining the CRC length of each data block according to the data accuracy rate of each data block.

In an alternative manner, the network device adjusts the data accuracy of the PDU set according to the channel environment, which may include: when the first value used for representing the channel environment is larger than a first threshold value, the network equipment improves the data accuracy of the PDU set; when the first value is larger than the second threshold value and smaller than or equal to the first threshold value, not adjusting the data accuracy of the PDU set; and when the first value is smaller than or equal to the second threshold value, reducing the data accuracy of the PDU set. Wherein the first threshold is greater than the second threshold. The larger the first value, which indicates that the better the channel environment, i.e. the better the communication quality, the first value may be determined based on parameters comprised by the channel environment. The channel environment may include one or more of the following parameters: data communication rate, bit error rate (BLER), channel quality indication (channel quality indication, CQI), signal to noise ratio (signal to interference plus noise ratio, SINR), blocking (Blocking), or data block transmission success rate. The larger the data communication rate, CQI, SINR, or data block transmission success rate, or the smaller the BLER or the congestion, the better the channel environment, that is, the better the communication quality, the larger the first value. In addition, the first threshold value and the second threshold value may be predefined, or may be determined by negotiation between the network device and the terminal device, and are not limited.

In an alternative way, the network device adjusts the data accuracy of the PDU set according to the channel environment, which may include: when each parameter included in the channel environment meets the corresponding first condition, the network equipment improves the data accuracy of the PDU set; when each parameter included in the channel environment respectively meets a corresponding second condition, not adjusting the data accuracy of the PDU set; and when each parameter included in the channel environment respectively meets the corresponding third condition, reducing the data accuracy of the PDU set. Among the parameters that the channel environment may include, the first condition that the data communication transmission rate, CQI, SINR, and data block transmission rate respectively correspond is that its value is greater than the corresponding third threshold, the second condition is that its value is greater than the corresponding fourth threshold and less than or equal to the corresponding third threshold, and the third condition is that its value is less than the corresponding fourth threshold. The first condition for which the BLER and the blocker respectively correspond is that their value is smaller than the corresponding fourth threshold, the second condition is that their value is greater than or equal to the corresponding fourth threshold and smaller than the corresponding third threshold, and the third condition is that their value is greater than or equal to the corresponding third threshold.

Wherein, for any one parameter that the channel environment may include, the third threshold corresponding to the parameter is greater than the fourth threshold corresponding to the parameter. In addition, the third threshold values corresponding to different parameters may be the same or different, and the fourth threshold values corresponding to different parameters may be the same or different. The third threshold value and the fourth threshold value corresponding to each parameter may be predefined, or may be determined by negotiation between the network device and the terminal device, and are not limited.

In an optional manner, the network device determining, according to the adjusted data accuracy, the data accuracy of each data block in the one or more data blocks corresponding to the PDU set may include: the network equipment determines the data accuracy of each data block according to the adjusted data accuracy based on the formula (2) and the formula (3), and the data accuracy of a plurality of data blocks corresponding to the PDU set is the same. Or the network equipment determines the data accuracy of each data block according to the adjusted data accuracy based on the formula (2) and the formula (4), wherein the data accuracy of a plurality of data blocks corresponding to the PDU set is partially the same or completely different.

Wherein,representing a downward rounding; x% is a value obtained by subtracting the adjusted data accuracy from 1; y is the number of data blocks corresponding to the PDU set; k is the maximum packet loss tolerant data number.

Wherein P is _s Is the probability that the maximum packet loss data number is within K; p (P) ₁ Is the data accuracy of each data block corresponding to the set of PDUs.Representing the number of combinations of i data blocks selected from the Y data blocks;represents +.f when i is taken as 0, 1, 2, …, K>And carrying out summation operation.

Wherein P is _s Is the probability that the maximum packet loss data number is within K; the Y data blocks corresponding to the PDU set are respectively numbered, L _j (j=0, 1,., K-1) is the number of one of K data blocks arbitrarily selected from the Y data blocks,is numbered L _j Data accuracy of data block of (2), P _i Is the data accuracy of the data block numbered i.Representing the number of combinations of K data blocks selected from the Y data blocks; />Represents +.about.1 when j is taken as 0,1, 2, …, K-1>Performing product calculation; />Indicating that i is not equal to L _j Y-K P _i Is the product of->Representing i as 0,1, 2, …, ">When (1)And carrying out summation operation.

In an optional another manner, the determining, by the network device, the data accuracy of each of the one or more data blocks corresponding to the PDU set according to the adjusted data accuracy may include: when the PDU set is data in one frame of image, the network equipment divides the image into a plurality of areas according to the transmission importance of the image content, and determines the data accuracy of each data block according to the adjusted data accuracy and the area of each data block corresponding to the PDU set in the plurality of areas. The data accuracy of the data blocks belonging to the same area in the plurality of data blocks corresponding to the PDU set is the same, and the data accuracy of the data blocks belonging to different areas is different. For example, the middle region of a frame of image is divided into important regions, the edge region is divided into fault tolerant regions, and the region between the middle region and the edge region is divided into transition regions. The three regions are relatively low in data accuracy of the data blocks belonging to the fault-tolerant region, relatively high in data accuracy of the data blocks belonging to the important region, and interposed therebetween.

Optionally, the data accuracy of the plurality of data blocks corresponding to the PDU set is all the same, so the CRC lengths of the plurality of data blocks are all the same, as shown in fig. 8; this approach is advantageous in simplifying the manner in which the CRC lengths of multiple data blocks are determined. Or, the data accuracy of the data blocks corresponding to the PDU set is all different, so that the CRC lengths of the data blocks are all different, as shown in fig. 8; this approach is advantageous in that it makes the determination of the CRC length of multiple data blocks more flexible. Or, if the data accuracy of the data blocks corresponding to the PDU set is partially the same, the CRC lengths of the data blocks are partially the same, as shown in fig. 8; this approach is more flexible than when the CRC lengths of the plurality of data blocks are all the same, and is simpler than when the CRC lengths of the plurality of data blocks are all different.

In an alternative manner, the network device determines the CRC length of each data block according to the data accuracy of each data block, which may include: and (3) bringing the data accuracy of each data block into a formula (1) to obtain the CRC length of each data block. Alternatively, the data accuracy rate P of each data block determined based on the formula (2) and the formula (3) may be determined ₁ Substituting P in the formula (1) into the formula (1) to obtain the CRC length of each data block corresponding to the PDU set. Alternatively, the data accuracy of each data block determined based on the formula (2) and the formula (4) is substituted as P in the formula (1) into the formula (1), respectively, to obtain each data CRC length of a block.

For example, the data accuracy of 20 data blocks corresponding to the PDU set is all the same, based on the formula (2) and the formula (3), if the adjusted data accuracy of the PDU set is 70%, the network device may determine that the CRC length of each data block is 4 bits, and then adding 4 bits of CRC to each data block corresponding to the PDU set may achieve a probability that the data transmission accuracy is above 70% under 99%. If the adjusted data accuracy of the PDU set is 80%, the network device can determine that the CRC length of each data block is 5 bits, and then the data transmission accuracy is over 80% under the probability that 99% of the CRC of 5 bits is added to each data block corresponding to the PDU set. If the adjusted data accuracy of the PDU set is 75%, the network device can determine that the CRC length of each data block is 6 bits, and then the data transmission accuracy is above 85% under the probability that 99% of the CRC of 6 bits is added to each data block corresponding to the PDU set.

For another example, the data accuracy of the 3 data blocks corresponding to the PDU set is all different, based on the formula (2) and the formula (4), if the adjusted data accuracy of the PDU set is 70%, the network device may determine that the CRC lengths of the 3 data blocks are 4bit, 5bit, and 6bit, respectively, and then adding the CRC of the 4bit, 5bit, and 6bit to the 3 data blocks corresponding to the PDU set may achieve a probability that the data transmission accuracy is above 70% under 99%.

For another example, the data accuracy of the 3 data blocks corresponding to the PDU set is partially the same, based on the formula (2) and the formula (4), if the adjusted data accuracy of the PDU set is 80%, the network device may determine that the CRC lengths of the three data blocks are 5bit, 6bit, and 6bit, respectively, and then adding the CRC of 5bit, 6bit, and 6bit to each data block corresponding to the PDU set may achieve a probability that the data transmission accuracy is above 80% under 99%.

In another alternative, the network device determining the CRC length of each data block according to the data accuracy of each data block may include: when the PDU set is data in one frame of image, the network device determines, for each of a plurality of areas divided by the image, a CRC length of a data block included in each area according to a data accuracy rate of the data block included in each area. The CRC lengths of the data blocks belonging to the same area in the plurality of data blocks corresponding to the PDU set are the same, and the CRC lengths of the data blocks belonging to different areas are different. For example, the network device may determine that the CRC of the data blocks belonging to the fault tolerant region is less bits or 0bit, the CRC of the data blocks belonging to the transition region is 3 bits to 6 bits, and the CRC of the data blocks belonging to the important region is 10 bits and above.

In embodiment 1.2, when the first CRC information is a CRC check length, step S101 may include: the network equipment adjusts the data accuracy of the PDU set according to the channel environment; determining the data accuracy of each data block in one or more data blocks corresponding to the PDU set according to the adjusted data accuracy; and determining the CRC check length of each data block according to the data accuracy rate and the data block transmission success rate of each data block. The success rate of data block transmission refers to the proportion of data blocks that pass the CRC check and are not retransmitted. In addition, the specific description of the network device adjusting the data accuracy of the PDU set according to the channel environment can be referred to the related description in embodiment 1.1, which is not repeated here.

Optionally, the determining, by the network device, the data accuracy of each of the one or more data blocks corresponding to the PDU set according to the adjusted data accuracy may include: the network device determines the data accuracy of each data block according to the adjusted data accuracy based on the formula (5).

Wherein P is ₂ The adjusted data accuracy of the PDU set; y is the number of data blocks corresponding to the PDU set; p (P) _di The data accuracy of the ith data block in the Y data blocks corresponding to the PDU set; omega _i Is the weighting factor corresponding to the ith data block in the Y data blocks corresponding to the PDU set, and omega corresponding to different data blocks corresponding to the PDU set _i May be the same or different, e.g., ω corresponding to the data block _i May be determined based on the length of the data block. In addition, canMultiple solutions meeting the formula (5) can exist, that is, multiple groups of numerical values exist for the data accuracy of the Y data blocks can meet the formula (5), and a group of solutions meeting the formula (5) can be found out in a traversal search mode to serve as the determined data accuracy of each of the Y data blocks.

In addition, when the PDU set is data in one frame of image, the network device determines, according to the adjusted data accuracy, the specific description of the data accuracy of each of the one or more data blocks corresponding to the PDU set may be referred to the related description in embodiment 1.1, and will not be repeated.

Optionally, the data accuracy of the plurality of data blocks corresponding to the PDU set is all the same, so that the CRC check lengths of the plurality of data blocks are all the same; this approach is advantageous in simplifying the manner in which the CRC check lengths of multiple data blocks are determined. Or, the data accuracy of the data blocks corresponding to the PDU set is different, so that the CRC lengths of the data blocks are different; this approach is advantageous in that it makes the determination of the CRC check length of multiple data blocks more flexible. Or, the data accuracy rate of the data blocks corresponding to the PDU set is partially the same, so that the CRC check length of the data blocks is partially the same; this approach is more flexible than when the CRC lengths of the plurality of data blocks are all the same, and is simpler than when the CRC lengths of the plurality of data blocks are all different.

In an optional manner, the network device determining the CRC check length of each data block according to the data accuracy rate and the data block transmission success rate of each data block may include: the network equipment determines the CRC check length of each data block in one or more data blocks corresponding to the PDU set according to the data accuracy rate and the data block transmission success rate of the data block based on the formula (6) and the formula (7).

P ₃ ＝(1-a) ^N (6)

/>

Wherein P is ₃ Is the success rate of data block transmission; p (P) _d Is the number of data blocksAccording to the accuracy rate; n is CRC length, N can be equal to 16 bits or 24 bits; a is the probability of error of a certain 1bit in CRC of Nbit when network transmission is in error; m is the CRC check length.

Specifically, substituting the transmission success rate of the data block and the CRC length into a formula (6) to obtain the value of a; substituting the data accuracy, a and CRC length of the data block into the formula (7) to obtain the CRC check length of the data block, namely the value of M. For example, N is equal to 24 bits, P ₃ If the data accuracy of the data block is 90%, the network equipment can determine that the CRC check length of the data block is 19 bits, and the data transmission accuracy can be more than 90% by adopting the 19bit CRC check data block; if the data accuracy of the data block is 80%, the network equipment can determine that the CRC check length of the data block is 15 bits, and the data transmission accuracy can be more than 80% by adopting the 15bit CRC check data block; if the data accuracy of the data block is 70%, the network device can determine that the CRC check length of the data block is 12 bits, and the data transmission accuracy can be above 70% by adopting the 12bit CRC check data block.

In another alternative manner, the network device determines the CRC check length of each data block according to the data accuracy rate and the data block transmission success rate of each data block, which may include: the network device determines, for each of a plurality of regions of the image partition, a CRC check length of a data block included in each region according to a data accuracy rate at which each region includes the data block. The CRC check lengths of the data blocks belonging to the same area in the plurality of data blocks corresponding to the PDU set are the same, and the CRC check lengths of the data blocks belonging to different areas are different. For example, the network device determines that the CRC of the data block belonging to the fault tolerant region is less bit or 0bit, the CRC of the data block belonging to the transition region is 8bit to 12bit, and the CRC of the data block belonging to the important region is 12bit or more.

In an alternative embodiment, the data accuracy (data accuracies) of the set of PDUs is related to one or more of the following: priority level (priority level), importance (importance), packet loss ratio (error rate) or packet loss ratio not allowed or traffic type (resource type) of the PDU set. The data accuracy of the PDU set refers to the desired or required data accuracy. The data accuracy of the PDU sets may be different when one or more of the foregoing is different, and the first CRC information of the data blocks corresponding to the PDU sets may be different based on the different data accuracy, which is beneficial to controlling the data transmission accuracy of different proportions, thereby implementing the hierarchical error control capability. Alternatively, the data accuracy of the set of PDUs may be expressed in terms of percentages.

For example, the priority of the PDU sets can be classified into 5 types from high to low, and the data accuracy of the corresponding PDU sets is 100%, 90%, 80%, 70% and 60%, respectively. For another example, the importance of a set of PDUs can be classified into 5 categories from high to low, with data accuracy for the corresponding set of PDUs being 100%, 90%, 80%, 70% and 60%, respectively. For another example, the data accuracy of the PDU set is related to the tolerable packet loss ratio, and if the tolerable packet loss ratio of the PDU set is listed as 30%, the data accuracy of the PDU set is 1-30% = 70%. For another example, the data accuracy of the PDU set is related to the ratio of the allowable packet loss, and if the ratio of the allowable packet loss of the PDU set is 70%, the data accuracy of the PDU set is 70%. For another example, the service type of the PDU set may be divided into I-frame and P-frame, where the data accuracy requirement of the PDU set is 100% when the service type is I-frame, and the data accuracy requirement of the PDU set is 80% when the service type is P-frame.

In an alternative embodiment, the set of PDUs is data in the uplink XR traffic. The method may further comprise: the terminal equipment determines the data accuracy of the PDU set and sends the data accuracy of the PDU set; accordingly, the network device receives the data accuracy of the set of PDUs. In another alternative embodiment, the set of PDUs is data in a downlink XR service. The method may further comprise: the network device determines the data accuracy of the set of PDUs.

In the two cases that the PDU set is data in the uplink XR service and the PDU set is data in the downlink XR service, in conjunction with fig. 9, the network device or the terminal device may determine the data accuracy of the PDU set at the application layer, and then sequentially transmit the data accuracy to the physical layer through the SDAP layer, the PDCP layer, the RLC layer, and the MAC layer. In addition, in the case that the PDU set is data in the uplink XR service, the terminal device may also send the data accuracy of the PDU set to the network device at the physical layer.

In an alternative embodiment, each of the one or more data blocks corresponding to the PDU set is respectively added with a corresponding service label and/or number. The data blocks may be identified by a traffic label and/or number, which facilitates the network device in determining the first CRC information for each data block and transmitting the first CRC information for each data block, and the different data blocks may be distinguished by the traffic label and/or number. Optionally, as shown in fig. 9, the application layer in the network device or the terminal device may further transmit, to the physical layer, a service tag and/or a number corresponding to each of one or more data blocks corresponding to the PDU set, so as to inform the physical layer of which data blocks the PDU set corresponds to.

S102, the network device sends first CRC information of each data block in one or more data blocks. Accordingly, the terminal device receives the first CRC information for each of the one or more data blocks.

In case the first CRC information is a CRC length, or both, that the PDU set is data in the downlink XR service and the first CRC information is a CRC check length, the network device may further perform step S102 after performing step S101, i.e. the network device may send the first CRC information of each data block to the terminal device after determining the first CRC information. In the case where the PDU set is data in the uplink XR service and the first CRC information is a CRC check length, the network device may not perform step S102 after performing step S101, i.e., the network device may not transmit the CRC check length of each data block after determining the first CRC information, which may reduce signaling overhead.

In an alternative embodiment, the first CRC information for each data block is semi-statically scheduled.

In another alternative embodiment, the network device transmitting the first CRC information for each of the one or more data blocks may include: the network device transmits one or more downlink control information (downlink control information, DCI) indicating first CRC information for each of the one or more data blocks. Accordingly, the terminal device receives the one or more DCIs.

Optionally, if the number of data blocks corresponding to the PDU set is greater than the number of data blocks that can be indicated by one DCI, the network device sends multiple DCIs; if the number of the data blocks corresponding to the PDU set is smaller than or equal to the number of the data blocks which can be indicated by one DCI, the network equipment sends the DCI. For example, one DCI can indicate first CRC information of 3 data blocks; if the PDU set corresponds to 10 data blocks, the network device can send 4 DCIs to the terminal device; wherein each of the 3 DCIs indicates the first CRC information of 3 data blocks of the 10 data blocks, the other 1 DCIs indicates the first CRC information of 1 data block of the 10 data blocks, and the data blocks indicated by different DCIs are different. If the PDU set corresponds to 2 data blocks, the network device may transmit 1 DCI to the terminal device, the DCI indicating first CRC information for each of the 2 data blocks corresponding to the PDU set.

Optionally, the CRC lengths of the data blocks indicated by any one of the plurality of DCIs are all the same, partially the same, or all different; that is, one DCI may be used to indicate CRC lengths of all the same, partially the same, or all different data blocks. Or, the CRC check lengths of the data blocks indicated by any DCI in the plurality of DCIs are all the same, partially the same or all different; that is, one DCI may be used to indicate the CRC check lengths of all the same, partially the same, or all different data blocks. In addition, when the CRC lengths/CRC check lengths of the plurality of data blocks corresponding to the PDUs are all different, the CRC lengths/CRC check lengths of the data blocks indicated by one DCI are all different. Hereinafter, a DCI will be described by taking the first CRC information as a CRC length as an example, and similar cases to the first CRC information as a CRC check length will not be described in detail.

For example, one DCI can indicate CRC lengths of 4 data blocks, among the data blocks #1 to #10 corresponding to the PDU set, CRC lengths of the data block #1, the data block #2, the data block #3, the data block #4, and the data block #5 are each CRC length #1, CRC lengths of the data block #6 and the data block #7 are each CRC length #2, CRC length of the data block #8 is CRC length #3, CRC length of the data block #9 is CRC length #4, and CRC length of the data block #10 is CRC length #5, wherein the CRC lengths #1, the CRC length #2, the CRC length #3, the CRC length #4, and the CRC length #5 are different from each other. DCI #1 indicates CRC lengths of data block #1, data block #2, data block #3, and data block #4, and it can be seen that the CRC lengths of the data blocks indicated by DCI #1 are all the same. DCI#2 indicates CRC lengths of data block #5, data block #6, and data block #7, and it can be seen that the CRC lengths of the data blocks indicated by DCI#2 are partially identical. DCI#3 indicates CRC lengths of data block #8, data block #9, and data block #10, and it can be seen that the CRC lengths of the data blocks indicated by DCI#3 are different.

Optionally, one DCI includes one or more first variables, where the one or more first variables are in one-to-one correspondence with one or more data blocks indicated by the DCI, and the first variable corresponding to each data block is used to indicate first CRC information of the data block. For example, dci#1 is used to indicate CRC lengths of data block #1, data block #2, and data block #3, and dci#1 includes first variable #1, first variable #2, and first variable #3, which indicate CRC lengths of data block #1, data block #2, and data block #3, respectively.

In another alternative, one DCI may include a second variable indicating the first CRC information of each of the one or more data blocks indicated by the DCI, the CRC lengths of the data blocks indicated by the DCI are all the same, or the CRC check lengths of the data blocks indicated by the DCI are all the same. For example, dci#1 is used to indicate CRC lengths of data block #1, data block #2, and data block #3, dci#1 includes a second variable, and CRC lengths of data block #1, data block #2, and data block #3 are all equal to the second variable.

In an alternative embodiment, the method may further comprise: the network device adds CRC for the data block corresponding to the PDU set and sends the data block, the terminal device adopts CRC to check the received data block, and the PDU set is the data in downlink XR service. Or the terminal equipment adds CRC for the data block corresponding to the PDU set and sends the data block, the network equipment adopts CRC to check the received data block, and the PDU set is the data in the uplink XR service.

The specific operation of adding CRC to a data block and checking the data block with CRC is described below in terms of whether the PDU set is data in the uplink XR service or data in the downlink XR service, and whether the first CRC information is a CRC length or a CRC check length, as described in embodiments 2.1 to 2.4.

In embodiment 2.1, the first CRC information is a CRC length, and the PDU set is data in downlink XR service. In this case, the network device may add a CRC corresponding to the CRC length for each of one or more data blocks corresponding to the PDU set, and transmit the one or more data blocks corresponding to the PDU set. Correspondingly, the terminal equipment receives one or more data blocks corresponding to the PDU set, and each data block in the one or more data blocks is checked by adopting CRC corresponding to the CRC length.

Referring to fig. 10, in an exemplary data transmission method, a network device may determine a data accuracy of a PDU set at an application layer and transmit the data accuracy to a physical layer, and determine a CRC length of each of one or more data blocks corresponding to the PDU set at the physical layer according to the data accuracy of the PDU set and a channel environment and transmit the CRC length to a terminal device. In addition, the network device further adds a CRC corresponding to the CRC length for each data block, and transmits an XR service data stream to the terminal device, where the XR service data stream includes one or more data blocks to which the CRC is added. After the terminal device receives the XR service data stream, for each data block of the one or more data blocks corresponding to the PDU set, the data block may be checked by using a CRC corresponding to the CRC length of the received data block.

For example, the PDU set corresponds to data block #1 and data block #2, and the network device determines that the CRC length of data block #1 is 5 bits and the CRC length of data block #2 is 6 bits. The network device may add a 5-bit CRC for the data block #1, add a 6-bit CRC for the data block #2, and send the CRC-added data block #1 and the data block #2 to the terminal device, and the terminal device may check the received data block #1 with the 5-bit CRC and check the received data block #2 with the 6-bit CRC.

In embodiment 2.2, the first CRC information is a CRC length, and the PDU set is the case of data in the uplink XR service. In this case, the terminal device may transmit one or more data blocks corresponding to the PDU set, each of the one or more data blocks having a CRC corresponding to the CRC length added thereto. Correspondingly, the network equipment receives one or more data blocks corresponding to the PDU set, and each data block in the one or more data blocks is checked by adopting CRC corresponding to the CRC length.

Referring to fig. 11, in an exemplary data transmission method, a terminal device may determine the data accuracy of a PDU set at an application layer and transmit the data accuracy to a physical layer, and then send the data accuracy of the PDU set to a network device through the physical layer. And the network equipment determines the CRC length of each data block in one or more data blocks corresponding to the PDU set according to the data accuracy of the PDU set and the channel environment, and sends the CRC length to the terminal equipment. The terminal device adds a CRC for each of one or more data blocks corresponding to the PDU set, the CRC added for each data block having a received CRC length for that data block. The terminal device sends an XR service data stream to the network device, the XR service data stream comprising one or more data blocks to which CRCs are added. After the network device receives the XR service data stream, for each data block of the one or more data blocks corresponding to the PDU set, the data block is checked by using a CRC corresponding to the CRC length of the data block.

For example, the PDU set corresponds to data block #1 and data block #2, and the network device determines that the CRC length of data block #1 is 5 bits and the CRC length of data block #2 is 6 bits. The terminal device may add a 5-bit CRC for the data block #1, add a 6-bit CRC for the data block #2, and send the CRC-added data block #1 and data block #2 to the network device, and the network device may check the data block #1 with the 5-bit CRC and check the data block #2 with the 6-bit CRC.

In embodiment 2.3, the first CRC information is a CRC check length, and the PDU set is the case of data in downlink XR service. In this case, the network device may send one or more data blocks corresponding to the set of PDUs, each of the one or more data blocks having an added 16-bit or 24-bit CRC. Correspondingly, the terminal equipment receives one or more data blocks corresponding to the PDU set, and each data block in the one or more data blocks is checked by adopting CRC corresponding to the CRC length.

In an exemplary data transmission method, referring to fig. 12, a network device may determine a data accuracy of a PDU set at an application layer and transmit the data accuracy to a physical layer, and determine a CRC check length of each of one or more data blocks corresponding to the PDU set at the physical layer according to the data accuracy of the PDU set and a channel environment and transmit the CRC check length to a terminal device. In addition, the network device also adds a 16bit or 24bit CRC for each data block and sends an XR service data stream to the terminal device, the XR service data stream comprising one or more data blocks to which the CRC is added. After receiving the XR service data stream, the terminal device adopts a CRC corresponding to the CRC length of the received data block to check the data block for each data block in one or more data blocks corresponding to the PDU set.

For example, the PDU set corresponds to a data block #1 and a data block #2, where the CRC check length of the data block #1 determined by the network device is 12 bits, and the CRC check length of the data block #2 is 15 bits; the network device adds 24-bit CRCs to the data block #1 and the data block #2, respectively, and transmits the CRC-added data block #1 and data block #2 to the terminal device. Then the terminal device may check the received data block #1 with a 12bit CRC and check the received data block #2 with a 15bit CRC.

In embodiment 2.4, the first CRC information is a CRC check length, and the PDU set is the case of data in the uplink XR service. In this case, the terminal device may transmit one or more data blocks corresponding to the PDU set, each of the one or more data blocks having an added CRC of 16 bits or 24 bits. Correspondingly, the network equipment receives one or more data blocks corresponding to the PDU set, and each data block in the one or more data blocks is checked by adopting CRC corresponding to the CRC check length.

Referring to fig. 13, in an exemplary data transmission method, a terminal device may determine the data accuracy of a PDU set at an application layer and transmit the data accuracy to a physical layer, and then send the data accuracy of the PDU set to a network device through the physical layer. And the network equipment determines the CRC length of each data block in one or more data blocks corresponding to the PDU set according to the data accuracy of the PDU set and the channel environment. In addition, the terminal device adds a 16-bit or 24-bit CRC for each of one or more data blocks corresponding to the PDU set, and sends an XR service data stream to the network device, where the XR service data stream includes the one or more data blocks to which the CRC is added. After the network device receives the XR service data stream, for each data block of the one or more data blocks corresponding to the PDU set, the data block is checked by using the CRC corresponding to the determined CRC check length of the data block.

For example, the PDU set corresponds to a data block #1 and a data block #2, and the network device determines that the CRC check length of the data block #1 is 12 bits and the CRC check length of the data block #2 is 15 bits. The terminal device adds 24-bit CRCs to the data block #1 and the data block #2, respectively, and transmits the CRC-added data block #1 and data block #2 to the network device. The network device may employ a 12bit CRC check data block #1 and a 15bit CRC check data block #2.

In summary, in the data transmission method, the network device may determine the first CRC information of each of one or more data blocks corresponding to the PDU set according to the data accuracy of the PDU set and the channel environment. It can be seen that the method may determine first CRC information for a data block in a physical layer, the first CRC information being determined at the physical layer based on a data accuracy of a set of PDUs and a channel environment; the network equipment can acquire the channel environment in time at the physical layer, so that the method determines that the time delay of the first CRC information is smaller, and is beneficial to enabling the time delay of data transmission in XR service to meet the time delay requirement of the XR service. In addition, the method adjusts the first CRC information of the data block in the physical layer based on the data accuracy of the PDU set and the channel environment, can dynamically control the data transmission accuracy, realizes the hierarchical error control capability in the physical layer, and can realize error detection without nearly 100%, so that retransmission of all error data packets, namely feedback of acknowledgement characters (acknowledge character, ACK) is not required even if part of the data packets are wrong, the data retransmission requirement is reduced, the data transmission rate requirement of XR service is reduced, and the service throughput is improved. In addition, when the method is applied to a plurality of PDU sets with different data accuracy rates, the first CRC information can be respectively determined for the plurality of PDU sets, so that the data transmission accuracy rates with different proportions can be dynamically controlled.

In order to implement the functions in the methods provided in the embodiments of the present application, the network device or the terminal device may include a hardware structure and/or a software module, and implement the functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.

As shown in fig. 14, an embodiment of the present application provides a communication device 1400. The communication apparatus 1400 may be a component of a network device (e.g., an integrated circuit, a chip, etc.) or a component of a terminal device (e.g., an integrated circuit, a chip, etc.). The communication device 1400 may also be other communication units for implementing the method in the method embodiments of the present application. The communication device 1400 may include: a communication unit 1401 and a processing unit 1402. The processing unit 1402 is configured to control the communication unit 1401 to perform data/signaling. Optionally, the communication device 1400 may further comprise a storage unit 1403.

In one possible design, the communication device 1400 is applied to XR services.

The processing unit 1402 is configured to determine first CRC information for each of one or more data blocks corresponding to the PDU set according to a data accuracy rate and a channel environment of the PDU set.

The communication unit 1401 is configured to transmit first CRC information of each of one or more data blocks.

In an alternative embodiment, the first CRC information is a CRC length.

In an alternative embodiment, the set of PDUs is data in a downlink XR service, and the first CRC information is a CRC check length.

In an alternative embodiment, the CRC lengths of the multiple data blocks corresponding to the PDU sets are all the same, partially the same, or all different; alternatively, the CRC check lengths of the multiple data blocks corresponding to the PDU set are all the same, partially the same, or all different.

In an alternative embodiment, the communication unit 1401 transmits the first CRC information for each of the one or more data blocks, in particular for: one or more DCIs are transmitted, the one or more DCIs being used to indicate first CRC information for each of the one or more data blocks.

In an alternative embodiment, the CRC lengths of the data blocks indicated by any one of the plurality of DCIs are all the same, partially the same, or all different; alternatively, the CRC check lengths of the data blocks indicated by any one of the plurality of DCIs are all the same, partially the same, or all different.

In an alternative embodiment, processing unit 1402 is further configured to add a CRC corresponding to a CRC length for each of one or more data blocks corresponding to the set of PDUs. The communication unit 1401 is further configured to send one or more data blocks corresponding to the PDU set. The set of PDUs is data in the downlink XR traffic.

In an alternative embodiment, the communications unit 1401 is further configured to receive one or more data blocks corresponding to the set of PDUs; the set of PDUs is data in the uplink XR traffic. Processing unit 1402 is also configured to check each of the one or more data blocks using a CRC corresponding to the CRC length.

In an alternative embodiment, the communication unit 1401 is further configured to receive a data accuracy of the set of PDUs; the set of PDUs is data in the uplink XR traffic.

In an alternative embodiment, the data accuracy corresponding to the set of PDUs is related to one or more of the following: priority of the set of PDUs, importance, tolerated packet loss ratio, disallowed packet loss ratio or traffic type.

In an alternative embodiment, each of the one or more data blocks corresponding to the PDU set is respectively added with a corresponding service label and/or number.

In another possible design, the communication device 1400 is applied to XR services.

A communication unit 1401 is configured to receive first CRC information of each of the one or more data blocks; the one or more data blocks are one or more data blocks corresponding to a set of PDUs; the first CRC information for each data block relates to the data accuracy and channel environment of the PDU set.

The communication unit 1401 is further configured to receive one or more data blocks; the processing unit 1402 is configured to check each of the one or more data blocks using a CRC corresponding to the first CRC information. Or,

the communication unit 1401 is further configured to transmit one or more data blocks, where each of the one or more data blocks has CRC corresponding to the first CRC information added thereto.

In an alternative embodiment, the first CRC information is a CRC length.

In an alternative embodiment, the communication unit 1401 receives the first CRC information for each of the one or more data blocks, in particular for: one or more DCIs are received, the one or more DCIs being used to indicate first CRC information for each of the one or more data blocks.

In an alternative embodiment, the communication unit 1401 is further configured to transmit the data accuracy of the set of PDUs; the set of PDUs is data in the uplink XR traffic.

In an alternative embodiment, the data accuracy of the set of PDUs is related to one or more of the following: priority of the set of PDUs, importance, tolerated packet loss ratio, disallowed packet loss ratio or traffic type.

The embodiments of the present application and the embodiments of the above-mentioned method are based on the same concept, and the technical effects brought by the embodiments are the same, and the specific principles refer to the description of the above-mentioned embodiments, and are not repeated.

The embodiment of the application also provides a communication device 1500, as shown in fig. 15. The communication device 1500 may be a network device or a terminal device, a chip system, a processor, or the like that supports the network device to implement the above method, or a chip, a chip system, a processor, or the like that supports the terminal device to implement the above method. The device can be used for realizing the method described in the method embodiment, and can be particularly referred to the description in the method embodiment.

The communications device 1500 may include one or more processors 1501. The processor may be configured to implement some or all of the functions of the network device or the terminal device described above by logic circuits or running a computer program. The processor 1501 may be a general purpose processor or a special purpose processor, etc. For example, it may be a baseband processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or a central processing unit (Central Processing Unit, CPU). The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminals, terminal chips, DUs or CUs, etc.), execute software programs, and process data of the software programs.

Optionally, the communications apparatus 1500 can include one or more memories 1502 on which instructions 1504 can be stored, which can be executed on the processor 1501, to cause the communications apparatus 1500 to perform the methods described in the method embodiments above. Optionally, the memory 1502 may also have data stored therein. The processor 1501 and the memory 1502 may be provided separately or may be integrated.

The memory 1502 may include, but is not limited to, nonvolatile memory such as Hard Disk Drive (HDD) or Solid State Drive (SSD), random access memory (random access memory, RAM), erasable programmable read-only memory (erasable programmable ROM, EPROM), ROM or portable read-only memory (compact disc read-only memory), and the like.

Optionally, the communication device 1500 may further include a transceiver 1505, an antenna 1506. The transceiver 1505 may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc. for implementing a transceiver function. Transceiver 1505 may include a receiver, which may be referred to as a receiver or receive circuitry, etc., for performing a receive function; the transmitter may be referred to as a transmitter or a transmitting circuit, etc., for implementing a transmitting function.

In one possible design, the communication apparatus 1500 is a network device case: the communication device 1500 is applied to XR services; the processor 1501 is configured to determine first CRC information of each of one or more data blocks corresponding to a PDU set according to data accuracy of the PDU set and channel environment. Transceiver 1505 is configured to transmit the first CRC information for each of the one or more data blocks.

The communication apparatus 1500 is a terminal device: the communication device 1500 is applied to XR services; transceiver 1505 is configured to receive first CRC information for each of the one or more data blocks; the one or more data blocks are one or more data blocks corresponding to a set of PDUs; the first CRC information for each data block relates to the data accuracy and channel environment of the PDU set.

Transceiver 1505 is also configured to receive one or more data blocks; the processor 1501 is configured to check each of the one or more data blocks using a CRC corresponding to the first CRC information. Alternatively, transceiver 1505 is also configured to transmit one or more data blocks, where each of the one or more data blocks has added thereto a CRC corresponding to the first CRC information.

In another possible design, the processor 1501 may include a transceiver to implement the receive and transmit functions. For example, the transceiver may be a transceiver circuit, or a communication interface, or an interface circuit. The transceiver circuitry, communication interface or interface circuitry for implementing the receive and transmit functions may be separate or integrated. The transceiver circuit, communication interface or interface circuit may be used for reading and writing codes/data, or the transceiver circuit, communication interface or interface circuit may be used for transmitting or transferring signals.

In yet another possible design, the processor 1501 may have instructions 1503 stored therein, where the instructions 1503 run on the processor 1501, the communication device 1500 may be caused to perform the method described in the above method embodiments. The instructions 1503 may be solidified in the processor 1501, in which case the processor 1501 may be implemented in hardware.

In yet another possible design, communication device 1500 may include circuitry that may perform the functions of transmitting or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in embodiments of the present application may be implemented on integrated circuits (integrated circuit, ICs), analog ICs, radio frequency integrated circuits (radio frequency integrated circuit, RFIC), mixed signal ICs, application specific integrated circuits (application specific integrated circuit, ASIC), printed circuit boards (printed circuit board, PCB), electronics, and the like. The processor and transceiver may also be fabricated using a variety of IC process technologies such as complementary metal oxide semiconductor (complementary metal oxide semiconductor, CMOS), N-type metal oxide semiconductor (NMOS), P-type metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication apparatus described in the above embodiment may be a network device or a terminal device, but the scope of the communication apparatus described in the embodiment of the present application is not limited thereto, and the structure of the communication apparatus may not be limited by fig. 15. The communication means may be a stand-alone device or may be part of a larger device. For example, the communication device may be:

(1) A stand-alone integrated circuit IC, or chip, or a system-on-a-chip or subsystem;

(2) A set of one or more ICs, optionally including storage means for storing data, instructions;

(3) An ASIC, such as a modem;

(4) Modules that may be embedded within other devices;

(5) Receivers, terminals, smart terminals, cellular telephones, wireless devices, handsets, mobile units, vehicle devices, network devices, cloud devices, artificial intelligence devices, etc.;

(6) Others, and so on.

For the case where the communication device may be a chip or a chip system, reference may be made to the schematic structural diagram of the chip shown in fig. 16. The chip 1600 shown in fig. 16 includes a processor 1601 and a communication interface 1602. Wherein the number of processors 1601 may be one or more, and the number of communication interfaces 1602 may be a plurality. The processor 1601 may be a logic circuit and the communication interface 1602 may be an input-output interface, an input interface, or an output interface. The chip 1600 may also include a memory 1603.

In one design, for the case where the chip is used to implement the functions of the network device in the embodiments of the present application:

the chip 1600 is applied to XR services.

The processor 1601 is configured to determine, according to a data accuracy of the PDU set and a channel environment, first CRC information of each of one or more data blocks corresponding to the PDU set.

The communication interface 1602 is configured to transmit first CRC information for each of one or more data blocks.

In another design, for the case where the chip is used to implement the functions of the terminal device in the embodiments of the present application:

the chip 1600 is applied to XR services.

The communication interface 1602 is configured to receive first CRC information for each of one or more data blocks; the one or more data blocks are one or more data blocks corresponding to a set of PDUs; the first CRC information for each data block relates to the data accuracy and channel environment of the PDU set.

The communication interface 1602 is also for receiving one or more data blocks; the processor 1601 is configured to check each of the one or more data blocks using a CRC corresponding to the first CRC information. Or,

the communication interface 1602 is further configured to transmit one or more data blocks, each of the one or more data blocks having added thereto a CRC corresponding to the first CRC information.

The communication device 1500 and the chip 1600 in the embodiments of the present application may also perform the implementation of the communication device 1400 described above. Those of skill would further appreciate that the various illustrative logical blocks (illustrative logical block) and steps (steps) described in connection with the embodiments herein may be implemented as electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Those skilled in the art may implement the described functionality in varying ways for each particular application, but such implementation is not to be understood as beyond the scope of the embodiments of the present application.

The embodiments of the present application and the data transmission method are based on the same concept, and the technical effects brought by the same concept are the same, and the specific principle is referred to the description in the data transmission method and is not repeated.

Those of skill would further appreciate that the various illustrative logical blocks (illustrative logical block) and steps (steps) described in connection with the embodiments herein may be implemented as electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Those skilled in the art may implement the described functionality in varying ways for each particular application, but such implementation is not to be understood as beyond the scope of the embodiments of the present application.

The present application also provides a computer readable storage medium storing computer software instructions which, when executed by a communications device, implement the functions of any of the method embodiments described above.

The present application also provides a computer program product for storing computer software instructions which, when executed by a communications device, implement the functions of any of the method embodiments described above.

The present application also provides a computer program which, when run on a computer, implements the functions of any of the method embodiments described above.

The application also provides a communication system comprising at least one network device, at least one terminal device of the above aspect. In another possible design, the system may further include other devices that interact with the network device and the terminal device in the solution provided in the present application.

In the above embodiments, the implementation may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., SSD), etc.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

In the various embodiments of the application, if there is no specific description or logical conflict, terms and/or descriptions between the various embodiments are consistent and may reference each other, and features of the various embodiments may be combined to form new embodiments according to their inherent logical relationships.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein A, B may be singular or plural. In the text description of the present application, the character "/", generally indicates that the associated object is an or relationship; in the formulas of the present application, the character "/" indicates that the front and rear associated objects are a "division" relationship.

It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. The sequence number of each process does not mean the sequence of the execution sequence, and the execution sequence of each process should be determined according to the function and the internal logic.

Claims

1. A data transmission method, wherein the method is applied to an augmented reality XR service, the method comprising:

determining first Cyclic Redundancy Check (CRC) information of each data block in one or more data blocks corresponding to a Protocol Data Unit (PDU) set according to the data accuracy and the channel environment of the PDU set;

and transmitting the first CRC information of each data block in the one or more data blocks.

2. The method of claim 1, wherein the first CRC information is a CRC length.

3. The method of claim 1, wherein the set of PDUs is data in a downlink XR service, and the first CRC information is a CRC check length.

4. A method according to claim 2 or 3, characterized in that,

CRC lengths of a plurality of data blocks corresponding to the PDU set are all the same, partially the same or all different; or,

And the CRC check lengths of the data blocks corresponding to the PDU set are all the same, partially the same or all different.

5. The method of any of claims 1-4, wherein the transmitting the first CRC information for each of the one or more data blocks comprises:

one or more Downlink Control Information (DCI) is transmitted, wherein the one or more DCI is used for indicating first CRC information of each data block in the one or more data blocks.

6. The method of claim 5, wherein the step of determining the position of the probe is performed,

the CRC length of the data block indicated by any DCI in the plurality of DCIs is all the same, partially the same or all different; or,

the CRC check lengths of the data blocks indicated by any one of the plurality of DCIs are all the same, partially the same, or all different.

7. The method according to any one of claims 2, 4 to 6, further comprising:

adding CRC corresponding to the CRC length for each data block in one or more data blocks corresponding to the PDU set;

transmitting one or more data blocks corresponding to the PDU set;

the set of PDUs is data in the downlink XR service.

8. The method according to any one of claims 2, 4 to 6, further comprising:

Receiving one or more data blocks corresponding to the PDU set; the PDU set is data in uplink XR service;

and checking each data block in the one or more data blocks by adopting the CRC corresponding to the CRC length.

9. The method of any one of claims 1, 2, 4 to 6, 8, further comprising:

receiving the data accuracy of the PDU set; the set of PDUs is data in the uplink XR service.

10. The method of any one of claims 1 to 9, wherein the data accuracy corresponding to the set of PDUs is related to one or more of: priority, importance, packet loss tolerance, packet loss impermissible proportion or service type of the PDU set.

11. The method according to any of claims 1 to 10, wherein each of the one or more data blocks corresponding to the set of PDUs is respectively added with a corresponding traffic label and/or number.

12. A data transmission method, wherein the method is applied to an augmented reality XR service, the method comprising:

receiving first cyclic redundancy check, CRC, information for each of the one or more data blocks; the one or more data blocks are one or more data blocks corresponding to a protocol data unit PDU set;

The first CRC information of each data block is related to the data accuracy and channel environment of the PDU set;

receiving the one or more data blocks, and checking each data block in the one or more data blocks by adopting CRC corresponding to the first CRC information; or,

and transmitting the one or more data blocks, wherein each data block in the one or more data blocks is added with CRC corresponding to the first CRC information.

13. The method of claim 12, wherein the first CRC information is a CRC length.

14. The method of claim 12, wherein the set of PDUs is data in a downlink XR service, and the first CRC information is a CRC check length.

15. The method according to claim 13 or 14, wherein,

16. The method of any of claims 12 to 15, wherein the receiving the first CRC information for each of the one or more data blocks comprises:

One or more downlink control information, DCI, is received, the one or more DCIs used to indicate first CRC information for each of the one or more data blocks.

17. The method of claim 16, wherein the step of determining the position of the probe comprises,

18. The method of any one of claims 12, 13, 15 to 17, further comprising:

transmitting the data accuracy of the PDU set; the set of PDUs is data in the uplink XR service.

19. The method according to any one of claims 12 to 18, wherein the data accuracy of the set of PDUs is related to one or more of the following: priority, importance, packet loss tolerance, packet loss impermissible proportion or service type of the PDU set.

20. The method according to any of claims 12 to 19, wherein each of the one or more data blocks corresponding to the set of PDUs is respectively added with a corresponding traffic label and/or number.

21. A communication device, characterized in that the device comprises means or units for implementing the method of any of claims 1 to 11 or 12 to 20.

22. A communication device comprising a processor and a communication interface for receiving signals from other communication devices than the communication device and transmitting to the processor or sending signals from the processor to other communication devices than the communication device, the processor being configured to implement the method of any one of claims 1 to 11 or 12 to 20 by logic circuitry or execution of code instructions.

23. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when run, implements the method of any one of claims 1 to 11 or 12 to 20.

24. A computer program product, the computer program product comprising: computer program code which, when executed, implements the method of any one of claims 1 to 11 or 12 to 20.