RECEPTION DEVICE AND RECEPTION METHOD

• US 20170048868A1
• Filed: 10/28/2016
• Published: 02/16/2017
• Est. Priority Date: 02/15/2010
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Sun Patent Trust
• Inventors: Nishio, Akihiko, Nakao, Seigo
• Granted Patent: US 9,642,142 B2
• Time in Patent Office: 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 communication apparatus comprising:

control circuitry which, in operation,

allocates an unconfigured carrier indicator field value (CIF value) to a component carrier identification index of a component carrier that is newly added to one or more component carriers, wherein a correspondence relationship between CIF values and component carrier identification indexes is maintained and the CIF values are respectively assigned to the component carriers, and

deletes a CIF value of a component carrier that is deleted; and

a transmitter which, in operation, transmits configuration information indicative of the added or deleted component carrier to a terminal apparatus, the configuration information including the CIF value and the component carrier identification index of the newly added component carrier and the component carrier identification index of the deleted component carrier.

2. The communication apparatus according to claim 1, wherein

the control circuitry, in operation, generates resource allocation information including the CIF value of the component carrier allocated to the terminal apparatus.

3. The communication apparatus according to claim 1, wherein

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

4. The communication 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:

allocating an unconfigured carrier indicator field value (CIF value) to a component carrier identification index of a component carrier that is newly added to one or more component carriers, wherein a correspondence relationship between CIF values and component carrier identification indexes is maintained and the CIF values are respectively assigned to the component carriers;

deleting a CIF value of a component carrier that is deleted; and

transmitting configuration information indicative of the added or deleted component carrier to a terminal apparatus, the configuration information including the CIF value and the component carrier identification index of the newly added component carrier and the component carrier identification index of the deleted component carrier.

6. The communication method according to claim 5, further comprising:

generating resource allocation information including the CIF value of 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 transmit 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.