Reception device and reception method

• US 10,506,598 B2
• Filed: 06/25/2018
• Issued: 12/10/2019
• 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): Truong, Lan-Huong
• Application Number:
  US16/017,881
• Publication Number:
  US 20180310313A1
• Time in Patent Office: 533 Days
• 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:

a receiver which, in operation, receives configuration information from a base station apparatus; and

control circuitry which, in operation,

in response to the configuration information indicating a carrier indicator field value (CIF value) assigned to an added component carrier and a component carrier identification index (CC ID index) of the added component carrier, adds the CIF value and the CC ID index of the added component carrier to a one-to-one correspondence relationship between one or more CIF values and one or more CC ID indexes, wherein the CIF value assigned to the added component carrier is a previously unconfigured CIF and the one-to-one correspondence relationship prior to the addition is maintained; and

in response to the configuration information indicating the CC ID index of a deleted component carrier, deletes the CIF value of the deleted component carrier from the one-to-one correspondence relationship.

2. The communication 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 communication apparatus.

3. The communication apparatus according to claim 1, wherein the CIF values are allocated only to component carriers that are used to receive data.

4. The communication apparatus according to claim 1, wherein the one-to-one correspondence relationship is set for each communication apparatus.

5. A communication method comprising:

receiving configuration information from a base station apparatus;

in response to the configuration information indicating a carrier indicator field value (CIF value) assigned to an added component carrier and a component carrier identification index (CC ID index) of the added component carrier, adding the CIF value and the CC ID index of the added component carrier to a one-to-one correspondence relationship between one or more CIF values and one or more CC ID indexes, wherein the CIF value assigned to the added component carrier is a previously unconfigured CIF and the one-to-one correspondence relationship prior to the addition is maintained; and

in response to the configuration information indicating the CC ID index of a deleted component carrier, deleting the CIF value of the deleted component carrier from the one-to-one correspondence relationship.

6. The communication method according to claim 5, comprising

receiving resource allocation information which includes the CIF value corresponding to the component carrier allocated to a communication 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 one-to-one correspondence relationship is set for each communication apparatus.