Wireless communication system, wireless communication method, base station apparatus, and terminal station apparatus

Abstract

Disclosed is a wireless communication system provided with a terminal station apparatus, and a base station apparatus which uses a plurality of communication frequency bands for wireless communication, that is, component carriers to transmit data to the terminal station apparatus, wherein the base station apparatus is provided with a frequency band determining unit which, when transmission of data is begun or the component carrier used in transmission of data to the terminal station apparatus has changed, determines the component carrier by which data will be transmitted, on the basis of the wireless quality of each of the plurality of component carriers, and sends a notice to the terminal station apparatus.

Description

technical field [0001] The present invention relates to a wireless communication system, a wireless communication method, a base station device, and a terminal station device. [0002] this application claims priority based on Japanese Patent Application No. 2009-133255 for which it applied to Japan on June 2, 2009, and uses the content here. Background technique [0003] 3GPP (3rd Generation Partnership Project; 3rd Generation Partnership Project) is conducting research on LTE-A (LTE-Advanced), which is the next communication method of the current LTE (Long Term Evolution; 3rd Generation Long Term Evolution). . In LTE-A, it is required to realize higher-speed communication than LTE, and support for a wider frequency band than LTE (a frequency band up to 100 MHz exceeding the 20 MHz frequency band of LTE) is required. [0004] However, it is difficult to secure a frequency domain with continuous broadband worldwide for LTE-A. In addition, from the purpose of maintaining co...

AI Technical Summary

Problems solved by technology

However, at this time, neither the terminal station apparatus nor the base station apparatus can grasp the radio quality (reception quality) of component carriers other than the anchor carrier

Therefore, when carrier aggregation communication is started, there is a problem that a component carrier with poor radio quality may be selected as a component carrier used for aggregation communication, and the communication efficiency may decrease with respect to the bandwidth being used.

[0027] In addition, in Non-Patent Document 1, there is no description of a method for determining an effective component carrier, so there is a possibility that a component carrier with poor radio quality is used for aggregation communication

[0028] Also, in Non-Patent Document 2, similar to Non-Patent Document 1, there is no description of a method for determining an effective component carrier, nor a method for synchronizing with a component carrier other than the anchor carrier.

Therefore, there is a possibility that component carriers with poor radio quality are used for carrier aggregation communication

Images