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User terminal, wireless base station, and wireless communication method

A terminal and channel technology, applied in the field of user terminals, wireless base stations and wireless communications

Active Publication Date: 2021-06-04
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Rel.13LTE, the carrier aggregation (LAA: License-Assisted Access) between the licensed band and the unlicensed band is taken as the research object, but in the future, the dual connection or the independence of the unlicensed band (stand -alone) may also be a research object

Method used

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  • User terminal, wireless base station, and wireless communication method
  • User terminal, wireless base station, and wireless communication method
  • User terminal, wireless base station, and wireless communication method

Examples

Experimental program
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Embodiment Construction

[0033] figure 1 It is an explanatory diagram of carrier aggregation (CA). Such as figure 1 As shown, in CA up to LTE Rel.12, a maximum of five component carriers (CCs) (CC #1 to CC #5) that use the LTE Rel.8 system band as a unit are bundled. That is, in carrier aggregation up to LTE Rel.12, the number of CCs that can be configured for each user terminal (UE: User Equipment) is limited to a maximum of five.

[0034] On the other hand, in the carrier aggregation of LTE Rel.13, it is considered to further expand the bandwidth by bundling six or more CCs. That is, in the carrier aggregation of LTE Rel.13, it is studied to expand the number of CCs (cells) that can be configured for each user terminal to six or more (CA enhancement). For example, if figure 1 As shown, in the case of bundling 32 CCs (CC#1 to CC#32), a band of up to 640 MHz can be secured.

[0035] In this way, it is expected to realize more flexible and high-speed wireless communication by expanding the number ...

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Abstract

When the number of component carriers (CCs) that can be configured for each user terminal is greater than that of the conventional system, the transmission power control of the uplink control channel is appropriately performed. The user terminal of the present invention has: a transmitting unit for transmitting an uplink control channel; and a control unit for controlling the transmission power of the uplink control channel, the control unit is based on the number of resource blocks constituting the format of the uplink control channel and the At least one of the payloads including cyclic redundancy check (CRC) bits in the format controls the transmission power of the uplink control channel.

Description

technical field [0001] The present invention relates to a user terminal, a wireless base station and a wireless communication method in the next generation mobile communication system. Background technique [0002] In a UMTS (Universal Mobile Telecommunications System) network, Long Term Evolution (LTE: Long Term Evolution) has become a standard for further high data rate, low delay, and the like (Non-Patent Document 1). LTE-Advanced (also called LTE Rel. 10, 11, or 12) has become a standard for the purpose of further wideband and high speed from LTE (also called LTE Rel. 8), and the successor system (also called LTE Rel. LTE Rel.13, etc.). [0003] The system band of LTE Rel.10 / 11 includes at least one component carrier (CC: Component Carrier) which takes the system band of LTE Rel.8 as a unit. In this way, the technique of aggregating a plurality of component carriers to widen the bandwidth is called Carrier Aggregation (CA: Carrier Aggregation). [0004] In addition, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/18H04W52/32
CPCH04W52/146H04W52/18H04W52/32H04W52/325H04L69/324H04W72/21H04W72/0473
Inventor 武田一树永田聪内野彻
Owner NTT DOCOMO INC