An uplink signal transmission method, a terminal device, and a network device, capable of realizing correct transmission, on an unlicensed spectrum, of an uplink demodulation signal used for demodulating an uplink channel. The method comprises: on the first time unit of an unlicensed spectrum, a terminal device transmits a first demodulation signal and uplink data that is obtained by a first transmission block by means of rate matching, wherein the first demodulation signal is used for demodulating the uplink data; the symbols occupied by the first demodulation signal do not comprise a first symbol, and the first symbol comprises at least one of a first symbol in the first time unit and a last symbol in the first time unit.

Embodiments of the application provide a method for transmitting data in a wireless communication network. A device of the network receives a bit sequence of K information bits. The device polar codes the bit sequence to obtain a first encoded sequence, wherein a length of the first encoded sequence is N, and N is greater than or equal to K. The device block interleaves the first encoded sequence to obtain an interleaved bit sequence. The device determines a transmission code rate R. When the transmission code rate R is less than the code rate threshold, the device outputs a second bit sequence. The length of the second bit sequence is M, M is smaller than N. The second bit sequence is punctured from the interleaved bit sequence by removing (N-M) bits from beginning of the interleaved bit sequence.

Provided are a method and a device for determining time-frequency resources. The method comprises: determining, by a first communication node, at least one piece of the following information about a first resource set: time-frequency resources of a second resource set contained in the first resource set, configuration information of the second resource set, time-frequency resource configuration information of the first resource set, and a dynamic signaling indication used for indicating whether the first resource set is multiplexed to a PDSCH transmission or a PUSCH transmission or whether the PDSCH transmission or the PUSCH transmission needs to implement rate matching; and after the above-mentioned information is determined, transmitting the information to a second communication node. Therefore, the problem in the related art of how to indicate the time-frequency resources used in the PDSCH transmission or the PUSCH transmission is solved, and the time-frequency resources used in the PDSCH transmission or the PUSCH transmission are indicated to a user.

A method of extremely high coding rates for next-generation wireless local area network (WLAN) systems involves coding an input data at a first coding rate using codes designed for coding up to a second coding rate lower than the first coding rate to provide a coded data. The method also involves wirelessly transmitting the coded data.

A parity puncturing apparatus and method for variable length signaling information are disclosed. A parity puncturing apparatus according to an embodiment of the present invention includes memory configured to provide a parity bit string for parity puncturing for the parity bits of an LDPC codeword whose length is 16200 and whose code rate is 3/15, and a processor configured to puncture a number of bits corresponding to a final puncturing size from the rear side of the parity bit string.

A communication data processing method can be applied to a terminal device, and include: detecting an actual transmission rate between the terminal device and a base station; and performing, if the actual transmission rate is less than a preset rate threshold for maintaining a connection between the terminal device and the base station, communication of compensation data with a preset server through the base station according to a difference between the actual transmission rate and the preset rate threshold, where the sum of a transmission rate of the compensation data and the actual transmission rate is greater than or equal to the preset rate threshold.

Examples pertaining to additional bit freezing for polar coding are described. An apparatus performs polar coding to encode a plurality of input subblocks of information bits, frozen bits and optional cyclic redundancy check (CRC) bits to generate a plurality of subblocks of coded bits. The apparatus then transmits at least some of the subblocks of coded bits. In performing the polar coding, the apparatus additionally freezes one of the plurality of input subblocks corresponding to one of the interleaved plurality of subblocks of coded bits which decreases polarization gain due to puncturing.

One coding method of a plurality of coding methods including at least a first coding method and a second coding method is selected, an information sequence is encoded by using the selected coding method, and an encoded sequence obtained by performing predetermined processing on the information sequence is modulated and transmitted. The first coding method is a coding method having a first coding rate, for generating a first encoded sequence by performing puncturing processing on a generated first codeword by using a first parity check matrix. The second coding method is a coding method having a second coding rate, for generating a second encoded sequence by performing puncturing processing on a generated second codeword by using a second parity check matrix that is different from the first parity check matrix, the second coding rate after the puncturing process being different from the first coding rate.

A pre-5th-generation (pre-5G) or 5G communication system for supporting higher data rates beyond a 4th-generation (4G) communication system, such as long term evolution (LTE) is provided. A channel encoding method in a communication or broadcasting system includes identifying an input bit size, determining a block size (Z), determining a low density parity check (LDPC) sequence to perform LDPC encoding, and performing the LDPC encoding based on the LDPC sequence and the block size.

A method and apparatus for transmitting PPDU in a wireless LAN system are proposed. Specifically, a transmitter generates the PPDU, and transmits the PPDU to a receiver through a 320 MHz band in which some bands are punctured. The PPDU includes a legacy preamble and an EHT field. The legacy preamble includes L-STF and L-LTF. The legacy preamble is generated by applying a first phase rotation value or a second phase rotation value. The first phase rotation value is obtained on the basis of a third phase rotation value and a fourth phase rotation value. The third phase rotation value is a phase rotation value having repeated a phase rotation value defined for an 80 MHz band in an 802.11ax system. The fourth phase rotation value is a phase rotation value defined in units of the 80 MHz band in the 320 MHZ band on the basis of an optimal PAPR of the L-LTF.