BASE STATION APPARATUS, MOBILE STATION APPARATUS, MOBILE COMMUNICATION SYSTEM AND COMMUNICATION METHOD
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Accused Products
Abstract
A base station apparatus, in a mobile communication system comprised of a plurality of base station apparatuses for performing transmission using mutually different frequency bands and a mobile station apparatus capable of concurrently communicating with each of the base station apparatuses, makes a determination whether the mobile station apparatus needs to perform Inter-Frequency Measurement to communicate with the plurality of base station apparatuses, and when Inter-Frequency Measurement is needed, based on the number of frequency bands of base station apparatuses that concurrently communicate with the mobile station apparatus and the number of frequency bands that the mobile station apparatus is capable of concurrently receiving, selects one of a first Inter-Frequency Measurement method without the need for providing a measurement gap in one of the frequency bands, and a second Inter-Frequency Measurement method with the need for providing a measurement gap in one of the frequency bands.
61 Citations
21 Claims
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1-11. -11. (canceled)
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12. A base station apparatus in a mobile communication system comprised of a base station apparatus and a mobile station apparatus that performs communications by carrier aggregation for concurrently using a plurality of frequency bands configured from the base station apparatus,
wherein the base station apparatus makes a determination whether the mobile station apparatus needs to perform Inter-Frequency Measurement, and when Inter-Frequency Measurement is needed as a result of the determination, based on the number of frequency bands used in communications with the mobile station apparatus and the number of frequency bands that the mobile station apparatus is capable of concurrently receiving, selects one of a first Inter-Frequency Measurement method without the need for providing a measurement gap to perform Inter-Frequency Measurement in one of the frequency bands, and a second Inter-Frequency Measurement method with the need for providing the measurement gap in one of the frequency bands.
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18. A base station apparatus in a mobile communication system comprised of a base station apparatus and a mobile station apparatus that performs communications by carrier aggregation for concurrently using a plurality of different frequency bands configured from the base station apparatus,
wherein the base station apparatus selects one of a first Inter-Frequency Measurement method without the need for providing a measurement gap to perform Inter-Frequency Measurement, and a second Inter-Frequency Measurement method with the need for providing the measurement gap, based on a mobile station apparatus capability concerning carrier aggregation of the mobile station apparatus, and a plurality of different frequency bands configured on the mobile station apparatus.
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19. A mobile station apparatus in a mobile communication system comprised of a base station apparatus and a mobile station apparatus that performs communications by carrier aggregation for concurrently using a plurality of frequency bands configured from the base station apparatus,
wherein the mobile station apparatus notifies the base station apparatus of a mobile station apparatus capability concerning carrier aggregation of the mobile station apparatus for the base station apparatus to select one of first Inter-Frequency Measurement without the need for providing a measurement gap to perform Inter-Frequency Measurement and second Inter-Frequency Measurement with the need for providing the measurement gap, and based on a control message received from the base station apparatus, performs one of the first Inter-Frequency Measurement and the second Inter-Frequency Measurement.
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20. A communication method in a mobile communication system comprised of a base station apparatus and a mobile station apparatus that performs communications by carrier aggregation for concurrently using a plurality of frequency bands configured from the base station apparatus, including at least:
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in the base station apparatus, making a determination whether the mobile station apparatus needs to perform Inter-Frequency Measurement; selecting one of a first Inter-Frequency Measurement method without the need for providing a measurement gap to perform Inter-Frequency Measurement in one of the frequency bands, and a second Inter-Frequency Measurement method with the need for providing the measurement gap in one of the frequency bands, based on the number of frequency bands used in communications by the base station apparatus and the mobile station apparatus, and the number of frequency bands that the mobile station apparatus is capable of concurrently receiving, when Inter-Frequency Measurement is needed as a result of the determination; and notifying the mobile station apparatus of the selected Inter-Frequency Measurement method.
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21. A communication method in a mobile communication system comprised of a base station apparatus and a mobile station apparatus that performs communications by carrier aggregation for concurrently using a plurality of different frequency bands configured from the base station apparatus, including at least:
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in the base station apparatus, making a determination whether the mobile station apparatus needs to perform Inter-Frequency Measurement based on a mobile station apparatus capability concerning carrier aggregation of the mobile station apparatus, and information of a plurality of different frequency bands configured on the mobile station apparatus; and selecting one of a first Inter-Frequency Measurement method without the need for providing a measurement gap to perform Inter-Frequency Measurement, and a second Inter-Frequency Measurement method with the need for providing the measurement gap, when Inter-Frequency Measurement is needed as a result of the determination.
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Specification