Mobile communication system

• US 10,356,635 B2
• Filed: 04/21/2016
• Issued: 07/16/2019
• Est. Priority Date: 04/28/2009
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Maeda, Miho, Mochizuki, Mitsuru, Saegusa, Taiga, Iwane, Yasushi
• Primary Examiner(s): Wang, Yaotang
• Application Number:
  US15/134,934
• Publication Number:
  US 20160255518A1
• Time in Patent Office: 1,181 Days
• Field of Search: None
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 8/24 Transfer of terminal data

Abstract

A base station which uses either one of a plurality of component carriers individually or uses an aggregate carrier which is an aggregate of the above-mentioned plurality of component carriers to carry out radio communications with a mobile terminal corresponding to the above-mentioned component carrier and also carry out radio communications with a mobile terminal corresponding to the above-mentioned aggregate carrier is provided. The base station notifies a bandwidth of an aggregate carrier which is an aggregate of all of the above-mentioned component carriers, as a bandwidth which the above-mentioned base station uses, to the mobile terminal corresponding to the above-mentioned aggregate carrier. As a result, while an improvement in the transmission rate is provided according to the aggregate carrier, the base station can also support an operation of a mobile terminal corresponding to a component carrier.

Claims

1. A mobile communication system comprising:

a base station; and

a mobile terminal that supports an aggregate carrier, the aggregate carrier being formed by aggregating a plurality of component carriers,

wherein the base station and the mobile terminal that supports the aggregate carrier are configured to carry out radio communications therebetween by using carrier aggregation to aggregate the plurality of component carriers, and

the mobile terminal that supports the aggregate carrier is configured to transmit, to the base station in response to an inquiry from the base station, capability information about carrier aggregation of the mobile terminal supporting the aggregate carrier,

wherein the capability information indicates a combination of frequency bands, each frequency band corresponding to component carriers capable of carrier aggregation.

2. The mobile communication system as claimed in claim 1, wherein the capability information indicates a number of component carriers capable of carrier aggregation.

3. The mobile communication system according to claim 1, wherein the capability information includes uplink capability information and downlink capability information differing from the uplink capability information, the uplink capability information being configured for an uplink radio communication directed from the mobile terminal toward the base station, and the downlink capability information being configured for a downlink radio communication directed from the base station toward the mobile terminal.

4. A base station that carries out radio communications with a mobile terminal that supports an aggregate carrier by using carrier aggregation to aggregate a plurality of component carriers, the aggregate carrier being formed by aggregating the plurality of component carriers, the base station comprising:

circuitry to receive capability information about carrier aggregation of the mobile terminal that supports the aggregate carrier, the capability information being transmitted by the mobile terminal that supports the aggregate carrier in response to an enquiry from the base station,

wherein the capability information indicates a combination of frequency bands, each frequency band corresponding to component carriers capable of carrier aggregation.

5. A mobile terminal that supports an aggregate carrier, which carries out radio communications with a base station by using carrier aggregation to aggregate a plurality of component carriers, the aggregate carrier being formed by aggregating the plurality of component carriers, the mobile terminal that supports the aggregate carrier comprising:

circuitry to transmit, to the base station in response to an enquiry from the base station, capability information regarding carrier aggregation of the mobile terminal supporting the aggregate carrier,

wherein the capability information indicates a combination of frequency bands, each frequency band corresponding to component carriers capable of carrier aggregation.