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Terminal device, base station device, communications system, and communications method

一种终端装置、基站的技术，应用在基带系统、无线通信、传输系统等方向，能够解决指定以及应用困难、阻碍传输效率等问题

Active Publication Date: 2013-03-06
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the existing communication methods, only the information representing the precoding matrix specified in one codebook can be reported, so it is difficult to specify and apply an appropriate precoder, which has become the main obstacle to the improvement of transmission efficiency. reason

Method used

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  • Terminal device, base station device, communications system, and communications method
  • Terminal device, base station device, communications system, and communications method
  • Terminal device, base station device, communications system, and communications method

Examples

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no. 1 Embodiment approach

[0056] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

[0057] figure 1 It is a schematic configuration diagram showing the configuration of the communication system according to the first embodiment of the present invention. The communication system in the figure is assumed to be an LTE-A system, and is configured to include a base station device (base station, transmission station, downlink transmission device, uplink reception device, eNodeB) 101 constituting a cell, and terminal devices (mobile station, receiving station, uplink transmitting means, downlink receiving means, mobile terminal, UE; user equipment) 102 . When the precoder is adaptively controlled for the transmitted downlink transmission signal 103, the terminal apparatus 102 refers to the downlink reference signal ( RS: Reference Signal), calculate the rank indicator RI (RankIndicator) that specifies the appropriate spatial multiplexing number, and...

no. 2 Embodiment approach

[0110] In the above-mentioned first embodiment, a case has been described in which the terminal apparatus reports the first feedback information in which RI and PI1 are coded together, and the second feedback information in which PI2 and CQI are coded together. In the second embodiment of the present invention, it will be described that the terminal device reports the third feedback information in which RI is coded, the fourth feedback information in which PI1 is coded, and the second feedback information in which PI2 and CQI are coded together. Case. Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

[0111] The module configurations of the base station device and the terminal device according to this embodiment can be compared with Figure 4 as well as Figure 5 The modules shown are implemented with the same module configuration. Among them, part of the processing in the feedback information generation unit 507 , ...

no. 3 Embodiment approach

[0130] In the above-mentioned first embodiment, a case has been described in which the terminal apparatus reports the first feedback information in which RI and PI1 are coded together, and the second feedback information in which PI2 and CQI are coded together. In the third embodiment of the present invention, a case will be described in which the terminal apparatus reports third feedback information in which RI is coded, and sixth feedback information in which PI1, PI2, and CQI are coded together. Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.

[0131] The module configurations of the base station device and the terminal device according to this embodiment can be compared with Figure 4 as well as Figure 5 The modules shown are implemented with the same module configuration. Among them, part of the processing in the feedback information generation unit 507 , the uplink subframe generation unit 509 , and the feedba...

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Abstract

Disclosed is a terminal device (102) which includes: communications means (509, 511, 512) for communicating with a base station device (101); and a generation means (507) for generating a ranking index which specifies a suitable ranking, a first partial precoder information and a second partial precoder information which specify a suitable precoder, and a reception quality index which specifies a suitable transmission rate. In a first feedback mode for periodic reporting of reception quality information to the base station device, the communications means report the second partial precoder information and the reception quality index at a first timing and the ranking index and the first partial precoder information at a second timing that differs from the first timing. In a second feedback mode for aperiodic reporting of reception quality information to the base station device, the communications means report the ranking index, the first partial precoder information, the second partial precoder information, and the reception quality index at the same timing.

Description

technical field [0001] The present invention relates to a terminal device, a base station device, a communication system, and a communication method. Background technique [0002] In WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), LTE-A (LTE-Advanced (advanced)) or WiMAX (Worldwide Interoperability for Microwave Access) based on 3GPP (Third Generation Partnership Project) Cell It is composed of a plurality of arranged cells, which can expand the communication area. In addition, by using different frequencies between adjacent cells or sectors, even terminal devices (mobile stations, receiving stations, uplink transmitters, downlink receivers, mobile terminals, UEs; user equipment), and can communicate without being interfered by transmission signals from a plurality of base stations. However, in such a manner, there is a problem of low frequency utilization efficiency. On the other hand, although frequency utilization efficiency can be improved ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04J11/00H04L15/00H04L27/01
CPCH04L2025/03802H04W28/18H04L5/0057H04L5/0023H04L15/00H04L1/0031H04J11/00H04L5/0053H04L1/0073H04L27/01H04L5/006H04W24/10H04L2025/03426H04L2025/03414H04L5/0048H04L1/0026H04L25/03343
Inventor 野上智造示泽寿之相羽立志黄磊
Owner SHARP KK
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