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CN-122029913-A - Terminal, wireless communication method and base station

CN122029913ACN 122029913 ACN122029913 ACN 122029913ACN-122029913-A

Abstract

A terminal according to an aspect of the present disclosure includes a control unit configured to determine a Control Channel Element (CCE) index corresponding to a candidate of a Physical Downlink Control Channel (PDCCH) using a plurality of layers based on a first derivation method, which is different from a second derivation method, which is related to a CCE index corresponding to a candidate of a PDCCH using one layer, and a reception unit configured to monitor the PDCCH using the plurality of layers based on the CCE index. According to the mode of the present disclosure, resource efficiency can be improved.

Inventors

  • Koga shuneko
  • MATSUMURA YUSUKE
  • Dao Kangjie
  • True Okamura
  • NAGATA AKIRA

Assignees

  • 株式会社NTT都科摩

Dates

Publication Date
20260512
Application Date
20230818

Claims (6)

  1. 1. A terminal, comprising: A control unit for judging a control channel element index (CCE index) corresponding to a candidate of a PDCCH using a plurality of layers based on a first derivation method related to the CCE index corresponding to a candidate of a PDCCH using one layer, wherein the first derivation method is different from a second derivation method related to the CCE index corresponding to the candidate of the PDCCH using one layer, and And a reception unit configured to monitor PDCCH using the plurality of layers based on the CCE index.
  2. 2. The terminal of claim 1, wherein, The first parameter based on the slot number in the first derivation method is different from the second parameter based on the slot number in the second derivation method.
  3. 3. The terminal of claim 1, wherein, The first parameter based on the slot number in the first derivation method is determined based on a specific initial value, The specific initial value is different from the value of the specific radio network temporary identifier, RNTI.
  4. 4. The terminal of claim 1, wherein, The first parameter based on the slot number in the first derivation method is based on a value of a specific radio network temporary identifier or RNTI, The control unit determines updating of the value of the specific RNTI based on the specific indication information.
  5. 5. A wireless communication method for a terminal includes: Judging the CCE index based on a first derivation method related to a control channel element index corresponding to a candidate of a PDCCH using a physical downlink control channel of a plurality of layers, the first derivation method being different from a second derivation method related to a CCE index corresponding to a candidate of a PDCCH using one layer, and And monitoring PDCCH using the plurality of layers based on the CCE indexes.
  6. 6. A base station, comprising: A control unit that indicates a control channel element index (CCE index) corresponding to a candidate of a PDCCH using a Physical Downlink Control Channel (PDCCH) of a plurality of layers using a first derivation method that is different from a second derivation method that is related to a CCE index corresponding to a candidate of a PDCCH using one layer, and And a transmitting unit configured to transmit PDCCH using the plurality of layers by using the CCE index.

Description

Terminal, wireless communication method and base station Technical Field The present disclosure relates to a terminal, a wireless communication method, and a base station in a next generation mobile communication system. Background In a universal mobile telecommunications system (Universal Mobile Telecommunications System (UMTS)) network, long term evolution (Long Term Evolution (LTE)) has been standardized for the purpose of further high-speed data rates, low latency, and the like (non-patent document 1). Further, LTE-Advanced (3 GPP rel.10-14) has been standardized for the purpose of further large capacity, advanced evolution, and the like of LTE (Third Generation Partnership Project (3 GPP (registered trademark)) Release (Release) 8, 9). Subsequent systems of LTE (e.g., also referred to as fifth generation mobile communication system (5 th generation mobile communication system (5G)), 5g+ (plus), sixth generation mobile communication system (6 th generation mobile communication system (6G)), new Radio (NR)), 3gpp rel.15 later, and the like are also being studied. Prior art literature Non-patent literature Non-patent document 1：3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access （E-UTRA） and Evolved Universal Terrestrial Radio Access Network （E-UTRAN）; Overall description; Stage 2 （Release 8）",2010, month 4 Disclosure of Invention Problems to be solved by the invention In future wireless communication systems (e.g., NR), for example, from the viewpoint of improving resource efficiency, it is being studied to improve the capacity of a downlink control channel. However, no adequate research has been conducted on specific methods thereof. If this study is insufficient, there is a concern that the improvement of resource efficiency is hindered and the increase of communication throughput is suppressed. Accordingly, it is an object of the present disclosure to provide a terminal, a wireless communication method, and a base station capable of improving resource efficiency. Means for solving the problems A terminal according to an aspect of the present disclosure includes a control unit configured to determine a Control Channel Element (CCE) index corresponding to a candidate of a Physical Downlink Control Channel (PDCCH) using a plurality of layers based on a first derivation method, which is different from a second derivation method, which is related to a CCE index corresponding to a candidate of a PDCCH using one layer, and a reception unit configured to monitor the PDCCH using the plurality of layers based on the CCE index. Effects of the invention According to the mode of the present disclosure, resource efficiency can be improved. Drawings Fig. 1A is a diagram showing an example of the number of accommodated UEs per 1 slot/symbol of each channel. Fig. 1B is a diagram showing an example of the number of accommodated UEs per 1 cell of each channel. Fig. 2A and 2B are diagrams illustrating an example of overlapping of resources of PDCCH candidates. Fig. 3 is a diagram showing an example of PDCCH DMRS to which FD-OCC is applied. Fig. 4 is a diagram showing another example of PDCCH DMRS to which FD-OCC is applied. Fig. 5 is a diagram showing another example of PDCCH DMRS to which FD-OCC is applied. Fig. 6 is a diagram showing an example of PDCCH DMRS to which TD-OCC is applied. Fig. 7 is a diagram showing another example of PDCCH DMRS to which the TD-OCC is applied. Fig. 8 is a diagram showing an example of PDCCH DMRS to which FD-OCC and TD-OCC are applied. Fig. 9 is a diagram showing another example of PDCCH DMRS to which FD-OCC and TD-OCC are applied. Fig. 10 is a diagram showing an example of PDCCH DMRS to which FDM is applied. Fig. 11 is a diagram showing another example of PDCCH DMRS to which FDM is applied. Fig. 12 is a diagram showing an example of PDCCH DMRS to which TDM is applied. Fig. 13 is a diagram showing another example of PDCCH DMRS to which TDM is applied. Fig. 14 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. Fig. 15 is a diagram showing an example of the configuration of a base station according to an embodiment. Fig. 16 is a diagram showing an example of a configuration of a user terminal according to an embodiment. Fig. 17 is a diagram showing an example of a hardware configuration of a base station and a user terminal according to an embodiment. Fig. 18 is a diagram showing an example of a vehicle according to an embodiment. Detailed Description (Minimum quality assurance in future Wireless communication systems) In existing wireless communication systems (e.g., rel. 15-17), mobile communication using public networks is generally a so-called best-effort (best-effort) type communication. Such communication has a feature that the communication carrier cannot control the instantaneous increase in traffic. For example, in a dense environment such as a concert/stadium, when business transients or explosions