Terminal device and base station device

A terminal device and base station technology, which is applied in the direction of transmission modification based on link quality, which is characterized by signaling, characterized by adaptation strategy, etc., and can solve problems such as CQI notification and notification failure

Active Publication Date: 2016-10-12
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the existing standard, the base station apparatus cannot report the control information of the MCS assuming 256QAM to the terminal apparatus using the PDCCH (Physical Downlink Control CHannel).
In addition, in the existing standard, the terminal apparatus cannot report the CQI assuming 256QAM to the base station apparatus

Method used

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  • Terminal device and base station device
  • Terminal device and base station device
  • Terminal device and base station device

Examples

Experimental program
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Effect test

no. 1 approach

[0041] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. figure 1 An example of the configuration of the radio communication system in this embodiment is shown. This system is composed of a base station device 101 and a terminal device 102 . The number of antenna ports configured in each device may be one or multiple. Here, the antenna port refers to a logical antenna that can be recognized by a device performing communication rather than a physical antenna.

[0042] In addition, in this embodiment, the base station apparatus 101 sets the 64QAM mode or the 256QAM mode for the terminal apparatus 102 . Here, the 64QAM mode means using the setting of the MCS table, CQI table, etc. that do not assume the data transmission of the PDSCH in 256QAM, and means not including 256QAM as the setting (structure) of the modulation method constituting the MCS table applied to the PDSCH. , or a setting (structure) in which the modula...

no. 2 approach

[0062] In the first embodiment, the MCS table is switched based on the C-RNTI information and the modulation mode setting, and the Rel-8 MCS table is selected when the control information cannot be accurately decoded from the SPS C-RNTI. However, in order to set the SPS, it is necessary to set the MSB of the MCS to '0', so transmission using 64QAM cannot be performed. In order to use 64QAM without changing the standard of setting the MSB to '0', it is necessary to use the Rel-12MCS table in SPS as well. In this embodiment, a case where the Rel-12MCS table is also used in the SPS will be described.

[0063] In order to use the Rel-12MCS table in SPS, the MCS table is not switched according to the C-RNTI information, but the modulation mode (64QAM mode or 256QAM mode) is set through RRC signaling, not only used in dynamic scheduling (DS) Modulation mode, modulation mode is also used in SPS. In addition, the MCS table for the modulation mode may not always be used. For example,...

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Abstract

In the present invention, a highly accurate MCS is selected in quasi-static priority scheduling (SPS). A terminal device, which receives control information, has a control information extraction unit, which decodes control information by using C-RNTI information and extracts an MCS index from the control information, and a PDSCH demodulation unit that determines an MCS by using the MCS table and MCS index, and performs demodulation. The PDSCH demodulation unit selects a predetermined MCS table from a plurality of MCS tables in accordance with C-RNTI information used in the decoding.

Description

technical field [0001] The present invention relates to a terminal device and a base station device. Background technique [0002] With the popularity of smartphones and the like in recent years, the demand for high-speed wireless transmission has increased. In 3GPP (The Third Generation Partnership Project) which is one of the standardization organizations, the standardization of LTE (Long Term Evolution) is being carried out, and the current standardization of Rel-11 (Release 11) Almost finished, Rel-12 standardization is in progress. [0003] In the downlink of LTE prior to Rel-11, QPSK (Quadrature Phase Shift Keying), 16QAM (Quadrature Amplitude Modulation), and 64QAM are supported as modulation schemes. In QPSK, 2 bits can be transmitted with one modulation symbol, in 16QAM, 4 bits can be transmitted with one modulation symbol, and in 64QAM, 6 bits can be transmitted with one modulation symbol. That is, the frequency utilization efficiency of 16QAM is higher than tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04L27/34H04W28/18
CPCH04L27/34H04L5/0028H04L5/0091H04L27/0008H04L27/32H04L1/0005H04L1/0011H04L1/0016H04L1/0003H04L1/0009H04L1/0023H04L1/1829H04L1/1854H04L27/0012H04W88/02H04W88/08
Inventor 中村理铃木翔一后藤淳悟中岛大一郎浜口泰弘
Owner SHARP KK
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