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User terminal, wireless base station, and wireless communications method

A user terminal, mode information technology, applied in wireless communication, electrical components, network planning, etc.

Inactive Publication Date: 2018-07-31
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to absorb the increased user traffic, it is required to add a further frequency band, but there is a limit on the spectrum in the licensed band (licensed spectrum)

Method used

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

Examples

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Embodiment Construction

[0038] In a system applying LTE / LTE-A in an unlicensed band (for example, an LAA system), an interference control function is considered necessary for coexistence with another operator's LTE, Wi-Fi, or other systems. In addition, systems that apply LTE / LTE-A in the unlicensed band may be collectively called LAA, LAA-LTE, LTE-U, U-LTE, etc. regardless of which application method is CA, DC, or SA.

[0039] Generally speaking, a transmission point (for example, a radio base station (eNB), a user terminal (UE), etc.) that uses a carrier in an unlicensed band (also referred to as a carrier frequency or simply a frequency) for communication In the case of other entities (for example, other user terminals) communicating on a carrier in the authorized band, transmission on the carrier is prohibited.

[0040] Therefore, the transmission point executes listening (listening) (LBT) at a timing before the transmission timing by a predetermined period. Specifically, the transmission point ...

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Abstract

In order to appropriately perform inter-frequency measurement in future wireless communications systems, this user terminal comprises: a reception unit that receives first pattern information and second pattern information, said first pattern information indicating the time length and cycle for a first gap interval and said second pattern information indicating the time length and cycle for a second gap interval; and a measurement unit that measures the reception signal intensity for different frequencies during the first gap interval, set on the basis of the first pattern information, and measures reference signal reception power and / or reference signal reception quality for different frequencies during the second gap interval, set on the basis of the second pattern information.

Description

technical field [0001] The 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 the UMTS (Universal Mobile Telecommunications System) network, Long Term Evolution (LTE: Long Term Evolution) is standardized for the purpose of further high-speed data rate, low delay, etc. (Non-Patent Document 1). In addition, LTE-A (also called LTE-Advanced, LTE Rel. 10, 11, or 12) is standardized for the purpose of further broadband domainization and high-speed acceleration from LTE (also called LTE Rel. 8 or 9). , also studied the successor system of LTE (for example, also known as FRA (Future Radio Access), 5G (5th generation mobile communication system (5th generation mobile communication system)), LTE Rel.13, etc. ). [0003] In LTE of Rel. 8-12, it is assumed that exclusive use is performed in a frequency band (also referred to as a licensed band) approved b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04W16/32H04W72/04
CPCH04W24/10
Inventor 原田浩树永田聪王静刘柳蒋惠玲
Owner NTT DOCOMO INC
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