CN-122003842-A - Terminal and communication method

Abstract

The terminal has a control unit that generates a DFT-s-OFDM (Discrete fourier transform-spread-Orthogonal Frequency Division Multiplexing: discrete Fourier transform spread orthogonal frequency division multiplexing) signal by performing asymmetric transform precoding between layer mapping and antenna port mapping, and a transmission unit that transmits the DFT-s-OFDM signal, and the control unit calculates a transport block size based on parameters related to the asymmetric transform precoding.

Inventors

• SHIBAIKE NAOYA
• NAGATA AKIRA
• LIU JUAN
• LIU WENJIA
• HOU XIAOLIN
• WANG JING
• PI QIPING
• CHEN LAN

Assignees

• 株式会社NTT都科摩

Dates

Publication Date

20260508

Application Date

20240119

Claims (6)

1. 1. A terminal, having: a control unit for generating a DFT-s-OFDM signal, i.e., a discrete Fourier transform spread orthogonal frequency division multiplexing signal, by performing asymmetric transform precoding between layer mapping and antenna port mapping, and A transmitting unit that transmits the DFT-s-OFDM signal, The control unit calculates a transport block size based on a parameter related to the asymmetric transform precoding.
2. 2. The terminal of claim 1, wherein, The parameter is a value having the input number of the asymmetric transform precoding as a numerator and the output number as a denominator.
3. 3. The terminal of claim 1, wherein, The control section calculates the number of information bits related to the transport block based on the parameter.
4. 4. The terminal of claim 1, wherein, The control unit calculates the number of RE, i.e., the number of resource elements, associated with the transport block based on the parameter.
5. 5. The terminal of claim 1, wherein, The control part performs insertion of the PT-RS in a time domain or a frequency domain.
6. 6. A communication method, performed by a terminal, comprising the steps of: performing asymmetric transform precoding between the layer mapping and the antenna port mapping to generate a DFT-s-OFDM signal, i.e., a discrete fourier transform spread orthogonal frequency division multiplexing signal; transmitting the DFT-s-OFDM signal, and A transport block size is calculated based on parameters related to the asymmetric transform precoding.

Description

Terminal and communication method Technical Field The present invention relates to a terminal and a communication method in a wireless communication system. Background In 3GPP (registered trademark) (3 rd Generation Partnership Project: third generation partnership project), in order to achieve further increase in system capacity, further increase in data transmission speed, further decrease in delay in a Radio section, and the like, a Radio communication system called 5G or NR (New Radio: new air interface) (hereinafter, this Radio communication system is referred to as "NR") has been studied. In 5G, various wireless technologies and network configurations have been studied in order to satisfy the requirement that throughput of 10Gbps or more is achieved and delay in a wireless section is 1ms or less (for example, non-patent document 1 and non-patent document 2). In addition, various demands for 6G for the next generation have been further studied. For example, the requirements are ultra-wideband communication (Ultra broadband communication), mission critical communication (Mission critical communication), very large scale connections (Ultra massive connection), global coverage (Universal coverage), smart connections (INTELLIGENT CONNECTION), ubiquitous sensing (Ubiquitous sensing), and the like. To meet this demand, as a new concept, it is aimed to be expandable (usable effectively in the future, for example), easily usable (Easy-operation), customizable (Customizable, for example, easily usable), and sustainable (Sustainable, for example, cost reduction, a more robust structure, with restoring force). In addition, as a guaranteed communication (Guaranteed communication), studies are being made to always guarantee minimum performance. Prior art literature Non-patent literature Non-patent document 1:3GPP TS 38.300 V17.6.0 (2023-09) Non-patent document 2:3GPP TS 38.401 V17.6.0 (2023-09) Non-patent document 3:3GPP TS 38.211 V17.6.0 (2023-09) Non-patent document 4:3GPP TS 38.214 V17.7.0 (2023-09) Disclosure of Invention Problems to be solved by the invention In the next generation wireless communication system, for example, OOBE (Out of band emission: out-of-band radiation) reduction, PAPR (Peak to average power ratio: peak to average power ratio) reduction, SE (Spectral efficiency) spectral efficiency improvement, and the like are demanded. While meeting this requirement, on the other hand, there is a need to not increase the complexity of the transmitter (Complexity). The present invention has been made in view of the above-described problems, and an object of the present invention is to prevent complexity of a transmitter in a wireless communication system from increasing. Means for solving the problems According to the disclosed technology, there is provided a terminal having a control section that performs asymmetric transform precoding between layer mapping and antenna port mapping to generate a DFT-s-OFDM (Discrete fourier transform-spread-Orthogonal Frequency Division Multiplexing: discrete Fourier transform spread orthogonal frequency division multiplexing) signal, and a transmission section that transmits the DFT-s-OFDM signal, the control section calculating a transport block size based on parameters related to the asymmetric transform precoding. Effects of the invention According to the disclosed technology, in a wireless communication system, the complexity of a transmitter can be not increased. Drawings Fig. 1 is a diagram showing a configuration example of a wireless communication system according to an embodiment of the present invention. Fig. 2 is a diagram showing an example of a transmitter. Fig. 3 is a diagram for explaining an example of the transmitter. Fig. 4 is a diagram for explaining an example of a transmitter in the embodiment of the present invention. Fig. 5 is a diagram for explaining an example of a transmitter in the embodiment of the present invention. Fig. 6 is a diagram for explaining an example of a transmitter in the embodiment of the present invention. Fig. 7 is a diagram for explaining an example of the transmitter. Fig. 8 is a diagram for explaining an example of a transmitter in the embodiment of the present invention. Fig. 9 is a diagram for explaining an example of a precoder in the embodiment of the present invention. Fig. 10 is a diagram showing an example of the functional configuration of the base station 10 in the embodiment of the present invention. Fig. 11 is a diagram showing an example of the functional configuration of the terminal 20 according to the embodiment of the present invention. Fig. 12 is a diagram showing an example of a hardware configuration of the base station 10 or the terminal 20 according to the embodiment of the present invention. Fig. 13 is a diagram showing an example of the structure of a vehicle 2001 in the embodiment of the invention. Detailed Description Hereinafter, embodiments of the present invention will be described with referen