Transmission device and transmission method

• US 8,855,075 B2
• Filed: 02/14/2011
• Issued: 10/07/2014
• Est. Priority Date: 02/15/2010
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Inventors: Nishio, Akihiko, Nakao, Seigo
• Primary Examiner(s): Patel, Chandrahas
• Assistant Examiner(s): TRUONG, LAN-HUONG
• Application Number:
  US13/578,505
• Publication Number:
  US 20120307778A1
• Time in Patent Office: 1,331 Days
• Field of Search: 370/336, 370/329
• US Class Current: 370/329
• 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 (101) provided in a base station (100): 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 base station apparatus comprising:

a setting section configured to allocate an unconfigured carrier indicator field value (CIF value) to a component carrier identification index of a newly added component carrier, while maintaining a correspondence relationship between CIF values and component carrier identification indexes, when a 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 transmitting section configured to transmit a notification signal to a terminal apparatus, the notification signal including the CIF value allocated to the newly added component carrier and the component carrier identification index of the newly added component carrier; and

when a part of the one or more component carriers is deleted,

the setting section deletes a CIF value corresponding to the deleted component carrier; and

the transmitting section transmits the notification signal including the component carrier identification index of the deleted component carrier.

2. The base station apparatus according to claim 1, further comprising:

a control section configured to generate resource allocation information, which includes the CIF value corresponding to the component carrier allocated to the terminal apparatus.

3. The base station apparatus according to claim 1, wherein

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

4. The base station 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 transmission method comprising:

allocating an unconfigured carrier indicator field value (CIF value) to a component carrier identification index of a newly added component carrier, while maintaining a correspondence relationship between CIF values and component carrier identification indexes, when a 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

transmitting a notification signal to a terminal apparatus, the notification signal including the CIF value allocated to the newly added component carrier and the component carrier identification index of the newly added component carrier; and

when a part of the one or more component carriers is deleted,

deleting a CIF value corresponding to the deleted component carrier; and

transmitting the notification signal including the component carrier identification index of the deleted component carrier.

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

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

7. The transmission method according to claim 5, wherein

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

8. The transmission method according to claim 5, wherein

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