Wireless communication system, base station apparatus, communication apparatus, and communication control program

Abstract

A CA deciding unit selects, from elemental carriers used by each of a plurality of base station apparatuses for communications, elemental carriers to be used for communications with terminal apparatuses. A CA set notifying unit notifies, to a subsidiary base station apparatus, carrier set information indicating the elemental carriers selected by the CA deciding unit. A transmitting unit of the main base station apparatus places a signal, which has been obtained by modulating a part of data to be transmitted to a terminal apparatus, on a first elemental carrier selected by the CA deciding unit and transmits the signal placed thereon. A transmitting unit of the subsidiary base station places a signal, which has been obtained by modulating a part of data to be transmitted to the terminal apparatus, on a second elemental carrier indicated by the notified carrier set information and transmits the signal placed thereon. A receiving unit of the terminal apparatus uses the first elemental carrier to receive the signal from the main base station apparatus and also uses the second elemental carrier to receive the signal from the subsidiary base station apparatus. A radio processing unit unifies the signals received by the receiving unit.

Description

technical field [0001] The present invention relates to a wireless communication system, a base station device, a communication device, and a communication control program. [0002] This application claims priority based on Japanese Patent Application No. 2010-049674 for which it applied in Japan on March 5, 2010, and uses the content here. Background technique [0003] In 3GPP (3rd Generation Partnership Project; 3rd Generation Partnership Project), LTE-A (LTE-Advanced) is currently being studied as LTE (Long Term Evolution; ) The next communication method of long-term evolution). In LTE-A, it is required to realize higher-speed communication than LTE and to support a wider frequency band than LTE (a frequency band up to 100 MHz exceeding the 20 MHz frequency band of LTE). [0004] However, it is difficult to secure a wideband contiguous frequency domain for LTE-A worldwide. In addition, it is preferable to have compatibility with LTE in LTE-A. [0005] Therefore, Carri...

AI Technical Summary

Problems solved by technology

[0016] However, in the prior art, a terminal device simultaneously communicates with one base station device using a carrier aggregation technique.

That is, in the prior art, there is a disadvantage that one base station must select a component carrier used for communication with a terminal device from among component carriers used for communication.

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