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EP-4191925-B1 - METHOD FOR TRANSMITTING UPLINK CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND DEVICE THEREFOR

EP4191925B1EP 4191925 B1EP4191925 B1EP 4191925B1EP-4191925-B1

Inventors

  • SEOK, Geunyoung
  • CHOI, Kyungjun
  • NOH, MINSEOK
  • SON, JUHYUNG
  • KWAK, JINSAM

Dates

Publication Date
20260506
Application Date
20210802

Claims (14)

  1. A method performed by a terminal in a wireless communication system, the method comprising: receiving slot configuration information (S7510); and repeatedly transmitting an uplink channel including a demodulation reference signal (DM-RS) on a resource determined based on the slot configuration (S7520), using frequency hopping on a first hop and a second hop, wherein the slot configuration comprises information on types of symbols of the resource, wherein the types of the symbols comprise one of a downlink symbol configured to be available for downlink transmission, an uplink symbol configured to be available for uplink transmission, and a flexible symbol configured to be neither the downlink symbol nor the uplink symbol; wherein the uplink channel is repeatedly transmitted in a first interval at the first hop, and a second interval at the second hop, wherein the first interval comprises first consecutive slots and the second interval comprises second consecutive slots, and wherein the repeatedly transmitted uplink channel satisfies conditions, and the conditions include: - phase continuity is maintained across uplink channel transmissions of the repeatedly transmitted uplink channel within each interval of the first interval and the second interval, - same power is maintained across uplink channel transmissions of the repeatedly transmitted uplink channel within each interval of the first interval and the second interval.
  2. The method of claim 1, wherein a number of the first consecutive slots and a number of the second consecutive slots are received from a base station.
  3. The method of claim 1 or 2, wherein each slot of the first consecutive slots has a same identification number, and wherein each slot of the second consecutive slots has a same identification number.
  4. The method of any one of claims 1 to 3, wherein the uplink channel at the first hop is transmitted on resources of a same number of physical resource blocks (PRBs) starting at a same PRB index in the frequency domain, wherein the uplink channel at the second hop is transmitted on resources of a same number of PRBs starting at a same PRB index in the frequency domain.
  5. The method of any one of claims 1 to 4, wherein the uplink channel is a physical uplink control channel (PUCCH) or a physical uplink shared channel (PUSCH).
  6. The method of any one of claims 1 to 5, wherein the uplink channel is transmitted within a time domain window, wherein the time domain window is configured based on information about the time domain window received from a base station.
  7. The method of claim 6, wherein the information about the time domain window comprises at least one of number of slots, number of symbols, and number of repeated transmissions of the uplink channel.
  8. The method of claim 6, wherein the time domain window is from a time point at which the repeatedly transmitted the uplink channel starts to a time point at which the repeatedly transmitted the uplink channel ends.
  9. The method of claim 6, wherein the time domain window comprises consecutive slots in the time domain, which comprise at least one of the uplink symbol and the flexible symbol.
  10. A terminal configured to operate in a wireless communication system, the terminal comprising: a transceiver; and a processor configured to control the transceiver, wherein the processor is configured to: receive slot configuration information, repeatedly transmit an uplink channel including a demodulation reference signal (DM-RS) on a resource determined based on the slot configuration, using frequency hopping on a first hop and a second hop, wherein the slot configuration comprises information on types of symbols of the resource, wherein the types of the symbols comprise one of a downlink symbol configured to be available for downlink transmission, an uplink symbol configured to be available for uplink transmission, and a flexible symbol configured to be neither the downlink symbol nor the uplink symbol; wherein the uplink channel is repeatedly transmitted in a first interval at the first hop, and a second interval at the second hop, wherein the first interval comprises first consecutive slots and the second interval comprises second consecutive slots, and wherein the repeatedly transmitted uplink channel satisfies conditions, and the conditions include: - phase continuity is maintained across uplink channel transmissions of the repeatedly transmitted uplink channel within each interval of the first interval and the second interval, - same power is maintained across uplink channel transmissions of the repeatedly transmitted uplink channel within each interval of the first interval and the second interval.
  11. The terminal of claim 10, wherein a number of the first consecutive slots and a number of the second consecutive slots are received from a base station.
  12. The terminal of claim 10 or 11, wherein each slot of the first consecutive slots has a same identification number, and wherein each slot of the second consecutive slots has a same identification number.
  13. The terminal of any one of claims 10 to 12, wherein the uplink channel at the first hop is transmitted on resources of a same number of physical resource blocks (PRBs) starting at a same PRB index in the frequency domain, wherein the uplink channel at the second hop is transmitted on resources of a same number of PRBs starting at a same PRB index in the frequency domain.
  14. A method performed by a base station in a wireless communication system, the method comprising: transmitting slot configuration information; and repeatedly receiving an uplink channel including a demodulation reference signal (DM-RS) on a resource determined based on the slot configuration, using frequency hopping on a first hop and a second hop, wherein the slot configuration comprises information on types of symbols of the resource, wherein the types of the symbols comprise one of a downlink symbol configured to be available for downlink transmission, an uplink symbol configured to be available for uplink transmission, and a flexible symbol configured to be neither the downlink symbol nor the uplink symbol; and wherein the uplink channel is repeatedly received in a first interval at the first hop and the uplink channel is repeatedly received in a second interval at the second hop, wherein the first interval comprises first consecutive slots and the second interval comprises second consecutive slots, and wherein the repeatedly transmitted uplink channel satisfies conditions, and the conditions include: - phase continuity is maintained across uplink channel reception of the repeatedly received uplink channel within each interval of the first interval and the second interval, - same power is maintained across uplink channel reception of the repeatedly received uplink channel within each interval of the first interval and the second interval.

Description

Technical Field The present specification relates to a wireless communication system and, more particularly, to a method for transmitting an uplink channel and a device therefor. Background Art After commercialization of 4th generation (4G) communication system, in order to meet the increasing demand for wireless data traffic, efforts are being made to develop new 5th generation (5G) communication systems. The 5G communication system is called as a beyond 4G network communication system, a post LTE system, or a new radio (NR) system. In order to achieve a high data transfer rate, 5G communication systems include systems operated using the millimeter wave (mmWave) band of 6 GHz or more, and include a communication system operated using a frequency band of 6 GHz or less in terms of ensuring coverage so that implementations in base stations and terminals are under consideration. A 3rd generation partnership project (3GPP) NR system enhances spectral efficiency of a network and enables a communication provider to provide more data and voice services over a given bandwidth. Accordingly, the 3GPP NR system is designed to meet the demands for high-speed data and media transmission in addition to supports for large volumes of voice. The advantages of the NR system are to have a higher throughput and a lower latency in an identical platform, support for frequency division duplex (FDD) and time division duplex (TDD), and a low operation cost with an enhanced end-user environment and a simple architecture. For more efficient data processing, dynamic TDD of the NR system may use a method for varying the number of orthogonal frequency division multiplexing (OFDM) symbols that may be used in an uplink and downlink according to data traffic directions of cell users. For example, when the downlink traffic of the cell is larger than the uplink traffic, the base station may allocate a plurality of downlink OFDM symbols to a slot (or subframe). Information about the slot configuration should be transmitted to the terminals. In order to alleviate the path loss of radio waves and increase the transmission distance of radio waves in the mmWave band, in 5G communication systems, beamforming, massive multiple input/output (massive MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, hybrid beamforming that combines analog beamforming and digital beamforming, and large scale antenna technologies are discussed. In addition, for network improvement of the system, in the 5G communication system, technology developments related to evolved small cells, advanced small cells, cloud radio access network (cloud RAN), ultra-dense network, device to device communication (D2D), vehicle to everything communication (V2X), wireless backhaul, non-terrestrial network communication (NTN), moving network, cooperative communication, coordinated multi-points (CoMP), interference cancellation, and the like are being made. In addition, in the 5G system, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC), which are advanced coding modulation (ACM) schemes, and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA), which are advanced connectivity technologies, are being developed. Meanwhile, in a human-centric connection network where humans generate and consume information, the Internet has evolved into the Internet of Things (IoT) network, which exchanges information among distributed components such as objects. Internet of Everything (IoE) technology, which combines IoT technology with big data processing technology through connection with cloud servers, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology are required, so that in recent years, technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC) have been studied for connection between objects. In the IoT environment, an intelligent internet technology (IT) service that collects and analyzes data generated from connected objects to create new value in human life can be provided. Through the fusion and mixture of existing information technology (IT) and various industries, IoT can be applied to fields such as smart home, smart building, smart city, smart car or connected car, smart grid, healthcare, smart home appliance, and advanced medical service. Accordingly, various attempts have been made to apply the 5G communication system to the IoT network. For example, technologies such as a sensor network, a machine to machine (M2M), and a machine type communication (MTC) are implemented by techniques such as beamforming, MIMO, and array antennas. The application of the cloud RAN as the big data processing technology described above is an example of the fusion of 5G technology and IoT technology. Gener