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KR-102961829-B1 - METHOD AND APPARATUS FOR SIGNAL TRANSMISSION TO HIGH SPEED MOBILE TERMINAL IN A WIRELESS COMMUNICATION SYSTEM

KR102961829B1KR 102961829 B1KR102961829 B1KR 102961829B1KR-102961829-B1

Abstract

The present disclosure relates to a communication technique and a system for integrating a 5G communication system with IoT technology to support higher data transmission rates than those of 4G systems. The present disclosure can be applied to intelligent services (e.g., smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security and safety-related services, etc.) based on 5G communication technology and IoT-related technology. The present disclosure proposes a method and apparatus for transmitting and receiving reference signals for efficient resource utilization in a wireless communication system.

Inventors

  • 박진현
  • 김태형
  • 오진영
  • 장영록
  • 지형주

Assignees

  • 삼성전자 주식회사

Dates

Publication Date
20260507
Application Date
20201015

Claims (20)

  1. In a method performed by a terminal of a wireless communication system, A step of obtaining from a base station first information regarding two transmission configuration indicator (TCI) states and second information regarding a single frequency network (SFN) transmission method; A step of identifying downlink reference signals of the two TCI states based on the first information above; and Based on the assumption that, according to the second information above, at least one demodulation reference signal (DM-RS) port of the downlink channel is quasi-co-located with the downlink reference signals of the two TCI states, the method includes the step of receiving the downlink channel from the base station. A method characterized in that the quasi-coordinate position parameter related to the Doppler shift of the second indicated TCI state among the two TCI states is excluded from the quasi-coordinate position parameters for the assumption.
  2. In paragraph 1, A method characterized in that the above downlink channel is a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH).
  3. In paragraph 1, A method characterized in that the above downlink reference signals are channel state information reference signals (CSI-RS) for tracking.
  4. In paragraph 1, A method characterized in that the quasi-coordinate position parameter related to the Doppler spread of the second indicated TCI state among the two TCI states is excluded from the quasi-coordinate position parameters for the assumption.
  5. In paragraph 1, A method characterized in that the downlink reference signals are transmitted without frequency offset prior compensation, and the downlink channel is quasi-co-located with the downlink reference signal of the first indicated TCI state among the two TCI states in relation to the Doppler shift.
  6. In a method performed by a base station of a wireless communication system, A step of providing a terminal with first information regarding two transmission configuration indicator (TCI) states and second information regarding a single frequency network (SFN) transmission method; and According to the second information above, the method includes the step of transmitting a downlink channel to the terminal, At least one demodulation reference signal (DM-RS) port of the downlink channel is quasi-co-located with the downlink reference signals of the two TCI states, and A method characterized in that the quasi-co-position parameter related to the Doppler shift of the second indicated TCI state among the two TCI states is not associated with the downlink channel.
  7. In paragraph 6, A method characterized in that the above downlink channel is a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH).
  8. In paragraph 6, A method characterized in that the above downlink reference signals are channel state information reference signals (CSI-RS) for tracking.
  9. In paragraph 6, A method characterized in that the quasi-co-position parameter related to the Doppler spread of the second indicated TCI state among the two TCI states is not associated with the downlink channel.
  10. In paragraph 6, A method characterized in that the downlink reference signals are transmitted without frequency offset prior compensation, and the downlink channel is quasi-co-located with the downlink reference signal of the first indicated TCI state among the two TCI states in relation to the Doppler shift.
  11. In a terminal of a wireless communication system, Transmitter/receiver; and It includes a control unit, and the control unit, From a base station, first information regarding two transmission configuration indicator (TCI) states and second information regarding a single frequency network (SFN) transmission method are obtained, and Based on the above first information, identify the downlink reference signals of the two TCI states, and Based on the assumption that, in accordance with the second information above, at least one demodulation reference signal (DM-RS) port of the downlink channel is quasi-co-located with the downlink reference signals of the two TCI states, the downlink channel is configured to be received from the base station through the transceiver, and A terminal characterized in that the quasi-coordinate position parameter related to the Doppler shift of the second indicated TCI state among the two TCI states above is excluded from the quasi-coordinate position parameters for the above assumption.
  12. In Paragraph 11, A terminal characterized in that the above-mentioned downlink channel is a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH).
  13. In Paragraph 11, A terminal characterized in that the above downlink reference signals are channel state information reference signals (CSI-RS) for tracking.
  14. In Paragraph 11, A terminal characterized in that the quasi-joint position parameter related to the Doppler spread of the second indicated TCI state among the two TCI states is excluded from the quasi-joint position parameters for the assumption.
  15. In Paragraph 11, A terminal characterized in that the downlink reference signals are transmitted without frequency offset prior compensation, and the downlink channel is quasi-co-located with the downlink reference signal of the first indicated TCI state among the two TCI states in relation to Doppler shift.
  16. In a base station of a wireless communication system, Transmitter/receiver; and It includes a control unit, and the control unit, Provides to the terminal first information regarding the states of two transmission configuration indicators (TCIs) and second information regarding a single frequency network (SFN) transmission method, and According to the second information above, it is configured to transmit a downlink channel to the terminal through the transceiver, and At least one demodulation reference signal (DM-RS) port of the downlink channel is quasi-co-located with the downlink reference signals of the two TCI states, and A base station characterized in that the quasi-co-position parameter related to the Doppler shift of the second indicated TCI state among the two TCI states above is not associated with the downlink channel.
  17. In Paragraph 16, A base station characterized in that the above-mentioned downlink channel is a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH).
  18. In Paragraph 16, A base station characterized in that the above downlink reference signals are channel state information reference signals (CSI-RS) for tracking.
  19. In Paragraph 16, A base station characterized in that the quasi-co-position parameter related to the Doppler spread of the second indicated TCI state among the two TCI states is not associated with the downlink channel.
  20. In Paragraph 16, A base station characterized in that the downlink reference signals are transmitted without frequency offset prior compensation, and the downlink channel is quasi-co-located with the downlink reference signal of the first indicated TCI state among the two TCI states in relation to Doppler shift.

Description

Method and apparatus for signal transmission to high-speed mobile terminal in a wireless communication system The present disclosure relates to a signal transmission and reception method and apparatus for a high-speed mobile terminal in a wireless communication system. Efforts are being made to develop improved 5G or pre-5G communication systems to meet the increasing demand for wireless data traffic since the commercialization of 4G communication systems. For this reason, 5G or pre-5G communication systems are referred to as Beyond 4G Network communication systems or Post-LTE systems. To achieve high data transmission rates, the implementation of 5G communication systems in the mmWave band (e.g., the 60 GHz band) is being considered. To mitigate path loss and increase transmission distance in the mmWave band, technologies such as beamforming, massive MIMO, full Dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large-scale antennas are being discussed for 5G communication systems. In addition, to improve the network of the system, technologies such as advanced small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network, Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation are being developed in 5G communication systems. Furthermore, in 5G systems, advanced coding modulation (ACM) methods such as FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), as well as advanced access technologies such as FBMC (Filter Bank Multi Carrier), NOMA (non-orthogonal multiple access), and SCMA (sparse code multiple access) are being developed. Meanwhile, the Internet is evolving from a human-centered network where humans generate and consume information into an IoT (Internet of Things) network where distributed components, such as objects, exchange and process information. IoE (Internet of Everything) technology, which combines IoT with Big Data processing technologies through connections with cloud servers, is also emerging. To implement IoT, technological elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required; consequently, technologies such as sensor networks, Machine-to-Machine (M2M) communication, and Machine-Type Communication (MTC) are currently being researched to facilitate the connection of objects. In an IoT environment, intelligent IT services that create new value for human life by collecting and analyzing data generated from connected objects can be provided. Through the convergence and integration of existing IT technologies with various industries, IoT can be applied to fields such as smart homes, smart buildings, smart cities, smart or connected cars, smart grids, healthcare, smart home appliances, and advanced medical services. Accordingly, various attempts are being made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, Machine to Machine (M2M), and Machine Type Communication (MTC) are being implemented using 5G communication techniques such as beamforming, MIMO, and array antennas. The application of cloud RAN as a big data processing technology, as previously described, can also be considered an example of the convergence of 5G and IoT technologies. FIG. 1 is a diagram illustrating the basic structure of the time-frequency domain, which is a wireless resource domain of a 5G system, according to one embodiment of the present disclosure. FIG. 2 is a drawing illustrating a slot structure considered in a 5G system according to one embodiment of the present disclosure. FIG. 3 is a drawing illustrating an example of a setting for a partial bandwidth in a 5G communication system according to an embodiment of the present disclosure. FIG. 4 is a diagram illustrating an example of a partial bandwidth change procedure in a 5G communication system according to an embodiment of the present disclosure. FIG. 5 is a diagram illustrating an example of a Control Resource Set (CORESET) in which a downlink control channel is transmitted in a 5G wireless communication system according to an embodiment of the present disclosure. FIG. 6 is a diagram illustrating frequency axis resource allocation methods in a 5G wireless communication system according to one embodiment of the present disclosure. FIG. 7 is a drawing illustrating an example of time axis resource allocation of NR according to one embodiment of the present disclosure. FIG. 8 is a diagram illustrating an example of time-axis resource allocation according to the subcarrier interval of a data channel and a control channel in a wireless communication system according to one embodiment of the present disclosure. FIG. 9 is a diagram illustrating the structure of a base station and a terminal wireless protocol when performi