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Radio communication device, radio communication system, and radio communication method

A wireless communication device, a technology of wireless communication, applied in the directions of wireless communication, selection device, multiplexing communication, etc., can solve the problems of non-compliance, enhanced transmission line, increased cost, etc.

Inactive Publication Date: 2008-03-26
KYOCERA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, as another problem, in the wireless communication system using the multiple carriers, for example, when two carriers are randomly selected to transmit uplink signals from the terminal to the base station, it is easy to cause the same terminal to use two carriers at the same time. , the case of transmitting an uplink signal to the base station
At this time, because the transmit power of the terminal needs to be the amount of two carriers, the transmit line needs to be strengthened accordingly, resulting in an increase in cost
In addition, when a device for limiting transmission power is installed in the terminal, there is a risk that the limit cannot be observed.

Method used

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  • Radio communication device, radio communication system, and radio communication method
  • Radio communication device, radio communication system, and radio communication method
  • Radio communication device, radio communication system, and radio communication method

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Embodiment Construction

[0017]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a wireless communication device according to an embodiment of the present invention. The wireless communication device (first wireless communication device) shown in FIG. 1 transmits and receives data with another wireless communication device (second wireless communication device) using a plurality of carriers and adopts the TDD (Time Division Duplex) method. Furthermore, the wireless communication device can also transmit and receive data with other wireless communication devices by using a plurality of carriers and adopting a TDD / SDMA (Time Division Duplex / Spatial Division Multiple Access) method. This wireless communication device can be used, for example, as a wireless terminal device for a mobile station.

[0018]

In FIG. 1 , a wireless reception signal received by an antenna 2 is input to a frequency down conv...

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Abstract

A radio communication device uses a plurality of carriers and transmits / receives data by the TDD method. The radio communication device includes a scheduler for selecting a slot of at least one carrier transmitting data and a transmission data assembling unit for distributing data to be transmitted to the slot of the carrier selected by the scheduler and making the slot of the carrier not selected by the scheduler empty.

Description

technical field [0001] The present invention relates to a wireless communication device, a wireless communication system and a wireless communication method. This application claims priority based on Japanese Patent Application No. 2005-98519 filed on March 30, 2005, the contents of which are incorporated herein. Background technique [0002] A conventional SDMA (Spatial Division Multiple Access, Space Division Multiple Access) wireless communication system includes a base station adaptive array antenna (Adaptive Array Antenna). When there are multiple mobile stations, user terminals (hereinafter referred to as "terminals"), the base station forms transmission beams with radiation patterns with different directivity for each terminal, and transmits radio waves for multiple terminals at the same time . When a base station forms a radiation pattern for a certain terminal among a plurality of terminals, an adaptive array antenna is used to form a transmission beam in a t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/36H04J1/00H04J3/00H04W16/28H04W72/54
CPCH04W72/1263H04W16/28H04W72/0453
Inventor 木村滋童方伟
Owner KYOCERA CORP