Control channel transmitting method, base station and terminal

• US 9,432,976 B2
• Filed: 03/19/2015
• Issued: 08/30/2016
• Est. Priority Date: 12/28/2004
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Seki, Hiroyuki
• Primary Examiner(s): Chriss, Andrew
• Assistant Examiner(s): Rivas, Salvador E
• Application Number:
  US14/663,036
• Publication Number:
  US 20150195825A1
• Time in Patent Office: 530 Days
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/0006 by adapting the transmission format
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/0029 Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling power control H04W52/04
• CPC Class Codes: H04L 1/003 Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
• CPC Class Codes: H04L 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 5/1453 of modulation type
• CPC Class Codes: H04W 52/262 taking into account adaptive modulation and coding [AMC] scheme AMC per se H04L1/0001
• CPC Class Codes: H04W 72/00 Local resource management
• 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

A method used by a terminal in a wireless communication system, the method includes: receiving a control channel transmitted from a base station with use of a control channel format selected from among a plurality of control channel formats, each including modulation scheme information, according to whether Multiple Input Multiple Output (MIMO) transmission is applied or not, and wherein a number of bits indicating a modulation scheme included in a control channel format to be selected when the MIMO transmission is applied is greater than that included in a control channel format to be selected when the MIMO transmission is not applied.

Claims

1. A method used by a terminal in a wireless communication system, the method comprising:

receiving a control channel transmitted from a base station with use of a control channel format selected from among a plurality of control channel formats, each including modulation scheme information, according to whether Multiple Input Multiple Output (MIMO) transmission is applied or not; and

demodulating the received control channel according to the modulation scheme information indicated by the control channel format selected by the base station,

wherein a number of bits indicating a modulation scheme included in a control channel format to be selected when the MIMO transmission is applied is greater than that include in a control channel format to be selected when the MIMO output transmission is not applied.