TRANSMISSION DEVICE AND TRANSMISSION METHOD

• US 20120307778A1
• Filed: 02/14/2011
• Published: 12/06/2012
• Est. Priority Date: 02/15/2010
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Nishio, Akihiko, Nakao, Seigo
• Granted Patent: US 8,855,075 B2
• Time in Patent Office: Days
• 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 transmission apparatus that transmits data by a component carrier set including a plurality of component carriers, the transmission apparatus comprising:

a configuration section that corrects, when a component carrier is added to the component carrier set, a labeling rule associating an identification information piece of a component carrier with a code point used as a label of the component carrier used for transmitting the data, the configuration section allocating an unused code point to the component carrier to be added, while maintaining a correspondence between the identification information piece of the component carrier and the code point according to the labeling rule before correction is made;

a formation section that forms a control signal for data transmission using each of the plurality of component carriers, the control signal of each of the component carriers being labeled by a code point according to the labeling rule corrected by the configuration section; and

a transmission section that transmits a notification signal including information about the correction of the labeling rule to a reception side of the data.

2. The transmission apparatus according to claim 1, wherein:

the labeling rule associates the code point with a pair of a region information piece indicating a width of a control channel region of the component carrier and the identification information piece of the component carrier; and

the configuration section allocates pairs each including the component carrier to be added and a corresponding one of a plurality of the region information pieces different in width, to different code points, respectively.

3. The transmission apparatus according to claim 2, wherein, the configuration section allocates at least some of the pairs to a code point already allocated to another component carrier, instead of the other component carrier.

4. The transmission apparatus according to claim 3, wherein the labeling rule fixedly allocates the region information pieces to the code points.

5. The transmission apparatus according to claim 3, wherein:

the notification signal comprises a plurality of fields storing code points related to the correction made by the formation section; and

the configuration section changes an arrangement pattern of the code points corresponding to the plurality of fields according to a combination of the region information pieces of the pairs.

6. The transmission apparatus according to claim 1, wherein;

the labeling rule is formed of a plurality of sub-rules;

each of the sub-rules comprises subsets each including a predetermined number of code points;

the plurality of sub-rules are different from each other in at least one of the predetermined number of the code points and the combination of the region information pieces included in the subsets; and

the configuration section configures the sub-rule to be used every reception side of the data.

7. A transmission method that transmits data by a component carrier set including a plurality of component carriers, the transmission method comprising:

a configuration step of correcting, when a component carrier is added to the component carrier set, a labeling rule associating an identification information piece of a component carrier with a code point used as a label of the component carrier transmitting the data, the configuration step allocating an unused code point to the component carrier to be added, while maintaining a correspondence between the identification information piece of the component carrier and the code point according to the labeling rule before correction is made;

a forming step of forming a control signal for data transmission using each of the plurality of component carriers, the control signal of each of the component carriers being labeled by a code point according to the labeling rule corrected in the configuration step; and

a transmission step of transmitting a notification signal including information about the correction of the labeling rule to a reception side of the data.