Reception device and reception method

• US 9,516,641 B2
• Filed: 09/04/2014
• Issued: 12/06/2016
• Est. Priority Date: 02/15/2010
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Sun Patent Trust
• Inventors: Nishio, Akihiko, Nakao, Seigo
• Primary Examiner(s): Patel, Chandrahas
• Assistant Examiner(s): TRUONG, LAN-HUONG
• Application Number:
  US14/477,501
• Publication Number:
  US 20150043495A1
• Time in Patent Office: 824 Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0047 Decoding adapted to other signal detection operation in conjunction with sequence estimation or equalization H04L25/03286
• CPC Class Codes: H04L 1/1829 Arrangements specially adapted for the receiver end
• CPC Class Codes: H04L 27/2634 Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0096 Indication of changes in allocation
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Disclosed are a transmission device and a transmission method with which it is possible to prevent delays in data transmission and to minimize the increase in the number of bits necessary for the notification of a CC to be used, in cases where a CC to be used is added during communication employing carrier aggregation. When a component carrier is to be added to a component carrier set, a setting section provided in a base station: modifies a CIF table that defines the correspondence between code points, which are used as labels for the respective component carriers contained in the component carrier set, and the identification information of the respective component carriers; and assigns a vacant code point to the component carrier to be added, while keeping the correspondence between the code points and the component carrier identification information defined in the CIF table before modification.

Claims

1. A terminal apparatus comprising:

receiver which, in operation, receives configuration information indicative of an added or deleted component carrier from a base station apparatus, the configuration information including a carrier indicator field value (CIF value) allocated to a newly added component carrier and a component carrier identification index of the newly added component carrier, wherein at the base station apparatus, an unconfigured CIF value is allocated to the component carrier identification index of the newly added component carrier, with a correspondence relationship between CIF values and component carrier identification indexes maintained, when the new component carrier is added to one or more component carriers, each of the CIF values being used to label each of the one or more component carriers; and

a setting circuitry which, in operation, corrects the correspondence relationship between CIF values and component carrier identification indexes based on the received configuration information,

wherein when a part of the one or more component carriers is deleted, the configuration information indicates the component carrier identification index of the deleted component carrier and the setting circuitry deletes a CIF value corresponding to the deleted component carrier.

2. The terminal apparatus according to claim 1, wherein

the receiver further receives resource allocation information which includes the CIF value corresponding to the component carrier allocated to the terminal apparatus.

3. The terminal apparatus according to claim 1, wherein

the CIF values are allocated only to component carriers that are used to receive data.

4. The terminal apparatus according to claim 1, wherein

the correspondence relationship between CIF values and component carrier identification indexes is set for each terminal apparatus.

5. A communication method comprising:

receiving configuration information from a base station apparatus, the configuration information including a carrier indicator field value (CIF value) allocated to a newly added component carrier and a component carrier identification index of the newly added component carrier, wherein at the base station apparatus, an unconfigured CIF value is allocated to the component carrier identification index of the newly added component carrier, with a correspondence relationship between CIF values and component carrier identification indexes maintained, when the new component carrier is added to one or more component carriers, each of the CIF values being used to label each of the one or more component carriers; and

correcting the correspondence relationship between CIF values and component carrier identification indexes based on the received configuration information

wherein when a part of the one or more component carriers is deleted, the configuration information indicates the component carrier identification index of the deleted component carrier and the correcting includes deleting a CIF value corresponding to the deleted component carrier.

6. The communication method according to claim 5, wherein

the receiving includes receiving resource allocation information which includes the CIF value corresponding to the component carrier allocated to the terminal apparatus.

7. The communication method according to claim 5, wherein

the CIF values are allocated only to component carriers that are used to receive data.

8. The communication method according to claim 5, wherein

the correspondence relationship between CIF values and component carrier identification indexes is set for each terminal apparatus.