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

A technology for a terminal device and a base station, applied in the field of communication, can solve problems such as hindering transmission efficiency, the base station and the mobile terminal cannot share the mobile terminal codebook, precoder designation, and application difficulties.

Active Publication Date: 2016-01-06
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, in existing communication schemes, when precoding matrices based on multiple codebooks are specified, the base station and the mobile terminal cannot share codebooks supported by the mobile terminal.
Therefore, in existing communication methods, it becomes difficult to specify and apply an appropriate precoder
Therefore, the base station and the mobile terminal cannot share the codebook supported by the mobile terminal, which is the main reason that hinders the improvement of transmission efficiency.

Method used

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

Examples

Experimental program
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no. 1 Embodiment approach

[0041] Hereinafter, the first embodiment of the present invention will be described. The communication system in the first embodiment includes a base station (base station device, transmission device, cell, transmission point, transmission antenna group, transmission antenna port group, component carrier, eNodeB, first communication device), and a mobile terminal (terminal device) , Receiving point, receiving terminal, receiving device, second communication device, receiving antenna group, receiving antenna port group, UE (User Equipment)).

[0042] In the communication system of the first embodiment, first, the base station instructs the mobile terminal to send the mobile terminal capability information (terminal device capability information, UE The capability information, UECapabilityInformation) are sent to the base station. The mobile terminal sends mobile terminal capability information to the base station based on the mobile terminal capability query from the base station...

no. 2 Embodiment approach

[0082] Hereinafter, the second embodiment of the present invention will be described. The communication system in the second embodiment is similar to the communication system in the first embodiment of the present invention, and includes a base station and a mobile terminal. Hereinafter, the description will be centered on the differences from the first embodiment of the present invention.

[0083] Figure 8 It is an example of mobile terminal capability information used in the second embodiment of the present invention. The mobile terminal capability information is configured to include: mobile terminal type, carrier aggregation information in the downlink, the maximum number of spatial multiplexing in the downlink, carrier aggregation information in the uplink, and the maximum spatial multiplexing in the uplink Use the number.

[0084] In the second embodiment, the mobile terminal compares the codebook supported by the mobile terminal with Figure 8 A part of the shown mobile t...

no. 3 Embodiment approach

[0095] In the first or second embodiment described above, the explicit or implicit notification related to whether to support the codebook 2 in a cell is described. In the third embodiment of the present invention, in the case of accommodating one mobile terminal in a cell (base station) with different numbers of antenna ports, the notification of whether the mobile terminal supports Codebook 2 and the processing after the notification Be explained.

[0096] The mobile terminal that supports the codebook for 8 antenna ports, namely Codebook 2, such as figure 1 As shown, the mobile terminal capability information is used to explicitly notify the base station that it supports the codebook 2 for 8 antenna ports. On the other hand, mobile terminals that do not support the codebook for 8-antenna ports, namely Codebook 2 (do not have) such as figure 1 As shown, the mobile terminal capability information is used to explicitly notify the base station that it does not support the codebo...

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Abstract

In a communication system in which communication is performed between a base station that performs precoding processing and a mobile terminal, communication is efficiently performed. The terminal apparatus notifies the base station apparatus of information indicating a codebook supported by the terminal apparatus among the plurality of codebooks. The base station apparatus determines the transmission mode based on the information indicating the codebook supported by the terminal apparatus.

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] Like WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), LTE-A (LTE-Advanced), WiMAX (Global Interconnection for Microwave Access) led by 3GPP (Third Generation Partnership Project) In the wireless communication system, the base station and the mobile terminal each have multiple transceiver antennas. Based on MIMO (Multiple Input Multiple Output) technology, high-speed data transmission can be realized between the base station and the mobile terminal. [0003] In the above-mentioned wireless communication system, the condition of the transmission path between the base station and the mobile terminal is estimated by using the reference signal for measuring the condition of the transmission path composed of signals known between the base station and the mobile terminal. In a wireless...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J99/00H04B7/04H04W28/18
CPCH04B7/046H04B7/0626H04B7/063H04B7/0639H04W8/24H04B7/0413H04W8/22H04W88/02H04L5/005H04W24/08H04W88/08
Inventor 示泽寿之野上智造
Owner SHARP KK