Abstract: A coding method and an apparatus are provided. XR data of different dimensions or different QoS requirements are distinguished during coding.

Abstract: A method includes sending, by a network device, first configuration information, and sending, by the network device, second configuration information. The first configuration information is useable to map a first reference signal to a first resource element set in a first time element. The first resource element set includes at least a first resource element. The second configuration information is useable to map a second reference signal to a second resource element set in a second time element. The second resource element set includes at least a second resource element. A frequency domain resource occupied by the first resource element overlaps a frequency domain resource occupied by the second resource element in response to the first time element and the second time element overlapping each other in a time domain.

Abstract: This application discloses a data encoding method and a communication apparatus. The method includes: obtaining S encoded packets corresponding to L first protocol data units PDUs; performing cascading on each of N encoded packet groups to obtain N second PDUs, where the N encoded packet groups are obtained by dividing the S encoded packets, and any two encoded packets included in a same encoded packet group correspond to different first PDUs; and a PDU header of the second PDU carries a first sequence number and a bitmap, the first sequence number is used to determine an encoded packet number corresponding to an encoded packet included in the second PDU, the bitmap includes H bits, one bit corresponds to one first PDU, and the bit indicates whether the second PDU includes an encoded packet in the first PDU corresponding to the bit; and outputting the N second PDUs.

Abstract: This application provides a data sending method and apparatus. The method includes: A node generates a first modulation symbol corresponding to a first modulation scheme. The node quantizes the first modulation symbol to obtain a target symbol. The target symbol corresponds to one of a plurality of constellation points of a second modulation scheme. The node preprocesses the target symbol to obtain to-be-sent data. The preprocessing includes one or more of layer mapping, antenna port mapping, precoding, or transform precoding. The node maps the to-be-sent data to a physical resource, and sends the to-be-sent data by using the physical resource.

Abstract: This application discloses a communication method that includes: receiving first control information of a first bandwidth part (BWP) and second control information of a second BWP, and receiving a first data channel and a second data channel based on the first control information. The first BWP includes a first frequency domain resource and a second frequency domain resource. The second BWP includes a third frequency domain resource, and the third frequency domain resource and the second frequency domain resource overlap. The first data channel is located on the first frequency domain resource, and the second data channel is located on the third frequency domain resource. The foregoing method provides a manner of transmitting data on the first and second BWPs that partially overlap.

Abstract: This application provides a data sending method and a communication apparatus. The method includes: A first node determines, based on a quality of a channel between the first node and a second node, a sending time for starting to send data, where the first node is one of several candidate previous-hop nodes of the second node. The first node starts to send the data to the second node at the sending time. According to the data sending method, when a node needs to send data to a next-hop node of the node, the node may determine, based on quality of a channel between the node and the next-hop node of the node, a sending time for starting to send the data.

Abstract: Technical solutions provided in this application may be applied to an extended reality XR service or another low-latency service. In a multi-hop scenario, after receiving a data packet sent by a previous-hop node and an encoding coefficient of the data packet relative to an original data packet, a forwarding node first determines a newest encoding coefficient based on the encoding coefficient received by the forwarding node from the previous-hop node and an encoding coefficient newly obtained by the forwarding node, and encodes, by using the newest encoding coefficient, the data packet received by the forwarding node from the previous-hop node. In this case, a data packet obtained through encoding is essentially a data packet obtained by the forwarding node by encoding the original data packet by using the newly obtained encoding coefficient. An encoding calculation amount can be further reduced while network recoding is implemented, thereby improving an encoding rate.

Abstract: This application may be applied to a protocol framework, for example, LTE or NR, and relates to the field of mobile communication, and in particular, to a data transmission method and apparatus, and a readable storage medium. The method includes: presetting a quantity of second MAC PDUs used for coding or presetting a total amount of original data used for coding, next, calculating a quantity of coded packets based on a preset code rate, and subsequently forming, in a specific rule sequence, a first MAC PDU by using an original data packet and the coded packets generated by using the original data, and then using a TB to carry the first MAC PDU for transmission. This application can be applied to an XR service and a low-latency service.

Abstract: A data transmission method, a data receiving method, and a communication apparatus, which may be applied to an extended reality (XR) service or another low-latency service. The method includes: obtaining K to-be-coded data packets with a same length; performing shift exclusive OR coding based on a coding coefficient and the K to-be-coded data packets, to obtain a check packet; and sending the check packet, where a packet header of the check packet does not include indication information of the coding coefficient, the coding coefficient of the check packet is related to a difference between a data length of the check packet and the length of the to-be-coded data packet, and the to-be-coded data packet includes an original packet or a system packet corresponding to an original packet.

Abstract: A data processing method and apparatus are disclosed, which may be applied to communication systems such as 5G and 6G. The method includes: obtaining an extended first codebook based on a second codebook by increasing a quantity of codewords or lengths of codewords, and performing first network coding or decoding based on the first codebook. Linear independence between codewords in the extended first codebook may be ensured as much as possible, so as to generate more valid redundant packets or check packets, thereby improving system reliability. Alternatively, flexible block lengths are supported, so as to perform efficient network coding or decoding on more original data packets, thereby improving system spectral efficiency. This application may be applied to an extended reality XR service or another low-delay service.

Abstract: This application describes a data transmission method and a communication apparatus. An example data transmission method includes: performing network coding based on a first data segment, to obtain a first network coded data segment; generating first cyclic redundancy check CRC information and a first data unit based on the first network coded data segment, where the first data unit includes a network coding parameter and the first CRC information that correspond to the first network coded data segment, and the first CRC information is for checking the first network coded data segment; and outputting the first data unit. According to of the example method and communication apparatus of this application, a waste of spectrum resources may be avoided, and spectrum efficiency may be improved.

Abstract: This application discloses a configuration method for a network coding function and a related apparatus. The network coding function is implemented on a first access network device. Information needed for a terminal device to perform network coding and/or network decoding is configured by the first access network device, to enable network coding and decoding between the first access network device and the terminal device to be possible. After the network coding function is introduced to an access layer, both latency performance and spectral efficiency performance are considered by transmitting an encoded packet. To be specific, the first access network device may flexibly adjust a quantity of sent encoded packets based on quality of an air interface link, to ensure that the terminal device can successfully perform decoding, reducing a data transmission latency while ensuring service transmission reliability.

Abstract: A data sending solution based on a maximum latency constraint T is provided. A transmitting end sends (T+B) data blocks, where first T data blocks are original data blocks, last B data blocks are B encoded data blocks, and a quantity of encoded data packets in the encoded data block is flexible and controllable. A receiving end only needs to perform joint decoding on a specific quantity of encoded data packets and a correct data packet in an incorrect data block, to recover an incorrect data packet in the incorrect data block. The solution in this application can meet a requirement of a maximum latency T, and can reduce a quantity of encoded data packets. The solution may be applied to an XR service or another service that has a low-latency requirement.

Abstract: This application provides a communication method and apparatus. In the communication method, a first RLC entity is introduced to transmit a network-coded redundant packet, and a second RLC entity is introduced to transmit a network-coded original packet, so that requirement-based transmission of the network-coded redundant packet can be supported. The communication method includes: A terminal device receives scheduling information from an access network device, obtains a network-coded redundant packet through a first RLC entity, generates a first TB based on the network-coded redundant packet, and sends the first TB to the access network device, where the first TB includes the network-coded redundant packet. In this way, the access network device schedules the network-coded redundant packet by using the scheduling information only when the network-coded redundant packet needs to be scheduled, thereby avoiding a waste and reducing unnecessary redundant transmission.

Abstract: A communication method and apparatus, and a readable storage medium are provided. A network coding NC parameter corresponding to a received index is determined based on a correspondence between the index and an NC parameter, and the NC parameter is applied to NC processing. According to this application, NC processing can adapt to a channel quality state, so that transmission reliability can be ensured and spectrum utilization efficiency can be improved. This application may be applied to an extended reality XR service, a scenario with a low latency and/or a scenario with a large uplink capacity.

Abstract: A data sending method includes: performing, by a first node, rate matching to determine a first bit sequence; determining, by the first node, a first symbol sequence based on the first bit sequence, and determining some to-be-mapped symbols in the first symbol sequence; and mapping, by the first node, the symbols to a first resource, and sending the symbols.

Abstract: A method is provided that a transmitting end generates a data segment, where the data segment includes header information and data parts of a plurality of CBs that are obtained by dividing a TB, there is a position mapping relationship between the data parts of the plurality of CBs and N sub-PDUs included in a MAC PDU, and the header information of each CB indicates a position mapping relationship between the CB and a sub-PDU corresponding to the CB. The transmitting end sends the TB that carries the data segment. Therefore, at a receiving end, if a CRC error occurs on the TB, the receiving end obtains a position of each CB and performs a CRC decision by using a CB as a granularity, to obtain a correct CB. Thereby performance of a wireless communication system is improved.

Abstract: The present disclosure discloses an example communication method and apparatus. One example communication method includes receiving, by a first node, decoding information and coded data from a second node, where the coded data is obtained after data of a node group in which the first node is located is encoded, the data of the node group includes data expected to be received by at least two nodes in the node group, and the at least two nodes include the first node. Data expected to be received by the first node is obtained by the first node based on the decoding information and the coded data.

Abstract: A coding method and an apparatus are provided. XR data of different dimensions or different QoS requirements are distinguished during coding.

Abstract: Coding method and apparatus provide for coding a to-be-coded data unit to obtain a coded data unit, where a size of the to-be-coded data unit is related to a size of a first data unit. The first data unit is a transport block TB, a protocol data unit PDU, or a service data unit SDU. The first data unit is generated based on the coded data unit.