Communication device, base station, and communication method
By incorporating a MAC control element with timing advance and cell identifier, the user device can accurately adjust uplink transmission timing for secondary cells in multiple TRP transmission scenarios, addressing the challenge of timing control in existing technologies.
JP7684134B2Active Publication Date: 2025-05-27SOKEN CO LTD +1
Patent Information
- Application Number
- JP2021128626
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-08-04
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2041-08-04
Smart Images
Figure 0007684134000003 
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Abstract
To provide user equipment, a base station, and a communication method that enable appropriate control of transmission timing of an uplink signal for a second cell when a first cell that is a serving cell and the second cell that belongs to the same frequency as the first cell are set.SOLUTION: In a mobile communication system, user equipment (100) in which a first cell C1 and a second cell C2 are set by a base station 200 that manages the first cell that is a serving cell and the second cell that belongs to the same frequency as the first cell includes: a receiving unit that receives, from the base station, a MAC control element including timing advance for adjusting transmission timing of an uplink signal to the second cell, and a cell identifier associated with the timing advance and uniquely identifying the second cell; and a control unit that identifies the second cell as a target cell for which transmission timing is adjusted by the timing advance, on the basis of, the cell identifier.SELECTED DRAWING: Figure 18
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Citation Information
Patent Citations
User terminal and wireless communication method
WO2020121497A1