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User terminal and wireless communication method

一种用户终端、无线通信的技术，应用在无线通信、数字传输系统、防止差错等方向，能够解决频谱有限等问题

Active Publication Date: 2018-12-21
NTT DOCOMO INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to absorb the increased user traffic, further additional frequency bands are required, but the spectrum in the licensed band (licensed spectrum) is limited

Method used

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  • User terminal and wireless communication method
  • User terminal and wireless communication method
  • User terminal and wireless communication method

Examples

Experimental program
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Embodiment Construction

[0038] It is considered that in a system (for example, LAA system) operating LTE / LTE-A in an unlicensed band, an interference control function becomes necessary in order to coexist with other operators' LTE, Wi-Fi, or other systems. In addition, as far as the system operating LTE / LTE-A in the unlicensed band is concerned, regardless of the operating form of CA, DC or SA, it can also be collectively referred to as LAA, LAA-LTE, LTE-U, U- LTE etc.

[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 detects that the unlicensed When other entities (for example, other user terminals) are communicating on a carrier in the licensed band, they are prohibited from transmitting through the carrier.

[0040] Therefore, the transmission point performs listening at a timing before the transmission ti...

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Abstract

The present invention appropriately performs a UL data asynchronous retransmission control, when scheduling transmission of UL data in multiple subframes using the same downlink control information (DCI). Thus, a user terminal according to one embodiment of the present invention is equipped with a receiving unit for receiving DCI, and a control unit for controlling uplink shared channel transmission for multiple subframes on the basis of the DCI. This user terminal is characterized in that the HARQ process number (HPN) to be used in each of the multiple subframes is determined on the basis ofthe HPN field value included in the DCI.

Description

technical field [0001] The present invention relates to a user terminal 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, etc. (Non-Patent Document 1). In addition, LTE-A (also called LTE Advanced, 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 or 9), and it is still in progress. Successor systems of LTE (for example, also referred to as FRA (Future Radio Access), 5G (5th generation mobile communication system), LTE Rel.13, etc.) are being studied. [0003] In LTE of Rel.8-12, it is assumed that an exclusive operation is performed in a frequency band (also referred to as a licensed band) licensed to a communication operator (Operator), and standardized. As...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/04H04W16/14H04W72/12H04W72/14
CPCH04L1/1614H04L1/1671H04L1/1822H04L1/1864H04L1/1819H04W16/14H04W72/23H04W72/0446H04W72/0453H04W74/0808
Inventor 原田浩树永田聪姜宇刘柳蒋惠玲
Owner NTT DOCOMO INC
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