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User terminal, wireless base station, and wireless communication method

A technology for user terminals and wireless base stations, applied in wireless communication, signaling distribution, transmission path sub-channel distribution, etc.

Active Publication Date: 2017-12-01
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It is assumed that in the unlicensed band, between different operators or non-operators, there is no synchronization, coordination or cooperation, etc., which may cause greater mutual interference compared with the licensed band

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

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Embodiment Construction

[0032] FIG. 1 is a diagram showing an example of a method of transmitting uplink control information (UCI) in Rel.10-12. Figure 1A Indicates the UCI multiplexing method when there is no indication of uplink data transmission (PUSCH transmission), Figure 1B Indicates the UCI multiplexing method when there is an instruction to send uplink data. In addition, FIG. 1 shows a case where five CCs (one PCell and four SCells) are configured as an example, and simultaneous transmission of PUCCH and PUSCH is not configured.

[0033] Figure 1A A case where PUSCH transmission is not performed on CC#1-CC#5 in a certain subframe is shown. At this time, the user terminal multiplexes the uplink control information of each CC into the PUCCH of a predetermined CC (here, CC#1) and transmits it.

[0034] Figure 1B A case is shown in which there is uplink data to be transmitted to the radio base station on CC#3 in a certain subframe (PUSCH transmission). At this time, the user terminal mul...

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Abstract

The present invention appropriately performs UL transmission even when communication is performed using a plurality of CCs having different communication qualities. This user terminal communicates with a wireless base station by using a first CC and a second CC, and comprises: a generating unit that generates uplink control information on the basis of a DL signal transmitted from the wireless base station; a transmitting unit that transmits the uplink control information; and a control unit that controls transmission of the uplink control information. The control unit controls transmission of the uplink control information such that an uplink shared channel of the first CC is used when there is an uplink shared channel transmission instruction in the first CC, and an uplink control channel of the first CC is used when there is an uplink shared channel transmission instruction in the second CC and there is no uplink shared channel transmission instruction in the first CC.

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) is standardized for the purpose of further increasing high-speed data rate, low delay, etc. (Non-Patent Document 1). Furthermore, for the purpose of further widening and speeding up LTE, a successor system of LTE called LTE Advanced (also called LTE-A) is being studied and standardized as LTE Rel.10-12. [0003] The system band of LTE Rel. 10-12 includes at least one component carrier (CC: Component Carrier) having the system band of the LTE system as a unit. Such a technique of aggregating a plurality of CCs to widen the bandwidth is called Carrier Aggregation (CA: Carrier Aggregation). In addition, in LTE Rel.12, dual connectivity (DC: Dual Connectivi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
CPCH04W76/15H04L5/0044H04L5/0053H04L27/0006H04L5/001H04W16/14H04W72/21
Inventor 武田一树内野彻原田浩树永田聪
Owner NTT DOCOMO INC