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Method and apparatus for transmitting and receiving downlink control signal in wireless communication system

專利號(hào)
US11159300B2
公開日期
2021-10-26
申請(qǐng)人
Samsung Electronics Co., Ltd.（KR Suwon-si）
發(fā)明人
Taehyoung Kim; Youngbum Kim; Jinyoung Oh; Seunghoon Choi; Heedon Gha
IPC分類
H04L5/10; H04L5/00; H04L1/00; H04W72/04
技術(shù)領(lǐng)域
coreset,dmrs,search,bs,terminal,pdcch,dci,space,in,may
地域： Suwon-si

摘要

The present disclosure relates to a communication technique for fusing a 5G communication system to support a higher data rate than a 4G system with IoT technology; and a system thereof. In embodiments according to the disclosure provide an improved method for transmitting and receiving a control channel. A method performed by a base station according to disclosed aspects includes: transmitting first control area setting information containing first demodulation reference signal (DMRS) setting information for a first control area, transmitting second control area setting information containing second DMRS setting information for a second control area, identifying a third control area where the first control area overlaps with the second control area, and transmitting a DMRS on the basis of the first DMRS configuration information in the first control area including the third control area. A corresponding method performed by a terminal, a base station and a terminal are also described.

說明書

  • New data indicator: This notifies whether HARQ transmission is initial transmission or retransmission.
  • Redundancy version: This notifies of a redundancy version of a HARQ.
  • Transmit power control (TPC) command for a physical uplink control channel (PUCCH): This notifies of a transmission power control command for a PUCCH which is a UL control channel.

    • The DCI passes through a channel coding and modulation process and is transmitted via a PDCCH or an enhanced PDCCH (EPDCCH) which is a DL physical control channel.

    A cyclic redundancy check (CRC) is attached to a payload of a DCI message, and the CRC is scrambled with a radio network temporary identifier (RNTI) corresponding to an identity of a terminal. Different RNTIs are used depending on the purpose of the DCI message (e.g., UE-specific data transmission, power control command, or random access response). That is, the RNTI is not explicitly transmitted but is transmitted in a state of being included in a CRC calculation process. Upon receiving a DCI message transmitted on a PDCCH, the terminal checks a CRC by using the allocated RNTI. If the check result of the CRC is correct, the terminal may recognize that the relevant message is transmitted to the terminal.

    FIG. 2 is a diagram illustrating a PDCCH 201 and an enhanced PDCCH (EPDCCH) 202 which are DL physical control channels for transmission of DCI of LTE according to an embodiment of the disclosure.

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