Control channel transmitting method, base station and terminal

• US 8,254,341 B2
• Filed: 11/25/2009
• Issued: 08/28/2012
• Est. Priority Date: 12/28/2004
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Seki, Hiroyuki
• Primary Examiner(s): Sefcheck, Gregory
• Assistant Examiner(s): Rivas, Salvador E
• Application Number:
  US12/625,759
• Publication Number:
  US 20100074229A1
• Time in Patent Office: 1,007 Days
• Field of Search: None
• US Class Current: 370/335
• 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 control channel transmitting method includes selecting one control channel format from among a plurality of control channel formats having different numbers of control points, according to whether to carry out multiple input multiple output transmission; and transmitting a control channel with the use of the selected control channel format.

Claims

1. A control channel transmitting method, comprising:

selecting one control channel format from among a plurality of control channel formats having different numbers of control points, each control channel format including modulation scheme information, according to whether to carry out multiple input multiple output transmission; and

transmitting a control channel with the use of the selected control channel format,

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

2. The control channel transmitting method as claimed in claim 1, wherein:

the control channel is transmitted, wherein the control channel is multiplexed in a time domain.

3. The control channel transmitting method as claimed in claim 1, wherein:

the control channel is transmitted, wherein the control channel is multiplexed in a frequency domain.

4. The control channel transmitting method as claimed in claim 1, wherein:

the control channel is transmitted, wherein the control channel is multiplexed in a code domain.

5. A base station comprising:

a selecting part configured to select one control channel format from among a plurality of control channel formats having different numbers of control points, each control channel format including modulation scheme information, according to whether to carry out multiple input multiple output transmission; and

a transmitting part configured to transmit a control channel to a terminal with the use of the selected control channel format,

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

6. A terminal comprising:

a control channel demodulating part configured to have a control channel format notified from a base station which transmits a control channel with the use of the control channel format which is selected from among a plurality of control channel formats having different numbers of control points, each control channel format including modulation scheme information, according to whether to carry out multiple input multiple output transmission, and demodulate the control channel received from the base station with the use of the notified control channel format; and

a data channel demodulating part configured to demodulate a data channel received from the base station with the use of a result of the demodulation of the control channel carried out by the control channel demodulating part,

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

7. A terminal comprising:

a transmitting part configured to have a control channel format notified from a base station, selected from among a plurality of control channel formats having different number of types of control points, each control channel format including modulation scheme information, according to whether to carry out multiple input multiple output transmission, and transmit a control channel to the base station with the use of the notified control channel format,

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

8. A control channel transmitting method, comprising:

selecting one control channel format from among a plurality of control channel formats having different numbers of bits of modulation scheme information in the control channel formats, according to whether to carry out multiple input multiple output transmission; and

transmitting a control channel with the use of the selected control channel format,

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

9. A base station, comprising:

a selecting part configured to select one control channel format from among a plurality of control channel formats having different numbers of bits of modulation scheme information in the control channel formats, according to whether to carry out multiple input multiple output transmission; and

a transmitting part configured to transmit a control channel to a terminal with the use of the selected control channel format,

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

10. A terminal comprising:

a control channel demodulating part configured to have a control channel format notified from a base station which transmits a control channel with the use of the control channel format which is selected from among a plurality of control channel formats having different numbers of bits of modulation scheme information in the control channel formats according to whether to carry out multiple input multiple output transmission, and demodulate the control channel received from the base station with the use of the notified control channel format; and

a data channel demodulating part configured to demodulate a data channel received from the base station with the user of a result of the demodulation of the control channel carried out by the control channel demodulating part,

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