Radio transmission device and radio transmission method

• US 8,526,546 B2
• Filed: 11/30/2012
• Issued: 09/03/2013
• Est. Priority Date: 08/13/2007
• Status: Active Grant

• Current Assignee: Godo Kaisha IP Bridge 1 (IP Bridge, Inc.)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Nakao, Seigo, Imamura, Daichi, Ogawa, Yoshihiko, Matsumoto, Atsushi, Hiramatsu, Katsuhiko
• Primary Examiner(s): Fan, Chieh M
• Assistant Examiner(s): Badipour, Bahman
• Application Number:
  US13/691,459
• Publication Number:
  US 20130089168A1
• Time in Patent Office: 277 Days
• Field of Search: None
• US Class Current: 375/340
• CPC Class Codes: H04B 1/7075 with code phase acquisition
• CPC Class Codes: H04J 11/0023 Interference mitigation or co-ordination direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541
• CPC Class Codes: H04J 13/004 Orthogonal
• CPC Class Codes: H04J 13/0062 Zadoff-Chu
• CPC Class Codes: H04J 13/0074 Code shifting or hopping
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 27/00 Modulated-carrier systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0016 Time-frequency-code
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

It is possible to improve the CQI reception performance even when a delay is caused in a propagation path, a transmission timing error is caused, or a residual interference is generated between cyclic shift amounts of different ZC sequences. For the second symbol and the sixth symbol of the ACK/NACK signal which are multiplexed by RS of CQI, (+, +) or (−, −) is applied to a partial sequence of the Walsh sequence. For RS of CQI transmitted from a mobile station, + is added as an RS phase of the second symbol and − is added as an RS phase of the sixth symbol. A base station (100) receives multiplexed signals of ACK/NACK signals and CQI signals transmitted from a plurality of mobile stations. An RS synthesis unit (119) performs synthesis by aligning the RS phase of CQI.

Claims

1. A radio communication method comprising:

receiving an acknowledgement or non-acknowledgement (ACK/NACK) signal that is spread with an orthogonal sequence, which is selected from a plurality of orthogonal sequences, the plurality of orthogonal sequences including more orthogonal sequences that render two values respectively corresponding to Nth symbol and Mth symbol of an ACK/NACK signal transmission slot in phase, than orthogonal sequence(s) that render said two values in opposite phases from each other;

despreading, with said orthogonal sequence, the spread ACK/NACK signal in the ACK/NACK signal transmission slot;

receiving two reference signals (RS), which are produced by multiplying two reference signal sequences with values having opposite phases from each other and which are arranged in the Nth symbol and the Mth symbol of a CQI signals transmission slot, and receiving channel quality indicator (CQI) signals arranged in symbols of the CQI signals transmission slot other than the Nth symbol and the Mth symbol; and

demodulating the CQI signals arranged in the CQI signals transmission slot.

2. The radio communication method according to claim 1, wherein

a physical resource, which supports a mixture of a format for communicating an ACK/NACK signal and a format for communicating CQI signals, is used to receive the spread ACK/NACK signal in the ACK/NACK signal transmission slot or the reference signals (RS) and the CQI signals arranged in the CQI signals transmission slot.

3. The radio communication method according to claim 2, wherein

in said physical resource block, the format for communicating an ACK/NACK signal is associated with a sequence defined by a first cyclic shift value and the format for communicating CQI signals is associated with a sequence defined by a second cyclic shift value different from the first cyclic shift value.

4. The radio communication method according to claim 1, wherein

the plurality of orthogonal sequences include orthogonal sequences of [+1, +1, +1, +1] and [+1, −

1, −

1, +1] having a sequence length of 4 corresponding to 1st, 2nd, 6th and 7th symbols of 7 symbols included in the ACK/NACK signal transmission slot; and

the Nth symbol is the 2nd symbol and the Mth symbol is the 6th symbol.

5. The radio communication method according to claim 1, further comprising:

transmitting to a mobile station a signal for controlling the multiplying of the two reference signal sequences with values having opposite phases from each other.

6. A radio communication method comprising:

receiving an acknowledgement or non-acknowledgement (ACK/NACK) signal that is spread with an orthogonal sequence, which is selected from a plurality of orthogonal sequences, the plurality of orthogonal sequences including more orthogonal sequences that render two values respectively corresponding to 2nd symbol and 6th symbol of an ACK/NACK signal transmission slot in phase, than orthogonal sequence(s) that render said two values in opposite phases from each other, each of the plurality of orthogonal sequences having a sequence length of 4 corresponding to 1st, 2nd, 6th and 7th symbols of 7 symbols included in the ACK/NACK signal transmission slot, the spread ACK/NACK signal being arranged in the 1st, 2nd, 6th and 7th symbols of the ACK/NACK signal transmission slot and first reference signals (1st RS) being arranged in 3rd, 4th and 5th symbols of the ACK/NACK signal transmission slot;

despreading the ACK/NACK signal with said orthogonal sequence;

receiving CQI signals arranged in 1st, 3rd, 4th, 5th and 7th symbols of a CQI signals transmission slot and receiving two second reference signals (2nd RS), which are produced by multiplying two reference signal sequences with values having opposite phases from each other and which are arranged in 2nd and 6th symbols of the CQI signals transmission slot; and

demodulating the CQI signals arranged in the CQI signals transmission slot.

7. The radio communication method according to claim 6, wherein

a physical resource, which supports a mixture of a format for communicating an ACK/NACK signal and a format for communicating CQI signals, is used to receive the ACK/NACK signal and the first reference signals (1st RS) arranged in the ACK/NACK signal transmission slot or the CQI signals and the second reference signals (2nd RS) arranged in the CQI signals transmission slot.

8. The radio communication method according to claim 7, wherein

in said physical resource block, the format for communicating an ACK/NACK signal is associated with a sequence defined by a first cyclic shift value and the format for communicating CQI signals is associated with a sequence defined by a second cyclic shift value different from the first cyclic shift value.

9. A radio communication apparatus comprising:

a receiving unit configured to receive an acknowledgement or non-acknowledgement (ACK/NACK) signal that is spread with an orthogonal sequence, which is selected from a plurality of orthogonal sequences, the plurality of orthogonal sequences including more orthogonal sequences that render two values respectively corresponding to Nth symbol and Mth symbol of an ACK/NACK signal transmission slot in phase, than orthogonal sequence(s) that render said two values in opposite phases from each other;

a despreading unit configured to despread, with said orthogonal sequence, the spread ACK/NACK signal in the ACK/NACK signal transmission slot,

wherein the receiving unit is further configured to receive two reference signals (RS), which are produced by multiplying two reference signal sequences with values having opposite phases from each other and which are arranged in the Nth symbol and the Mth symbol of a CQI signals transmission slot, and to receive channel quality indicator (CQI) signals arranged in symbols of the CQI signals transmission slot other than the Nth symbol and the Mth symbol; and

a demodulating unit configured to demodulate the CQI signals arranged in the CQI signals transmission slot.

10. The radio communication apparatus according to claim 9, wherein

the receiving unit receives the spread ACK/NACK signal in the ACK/NACK signal transmission slot or the reference signals (RS) and the CQI signals arranged in the CQI signals transmission slot using a physical resource that supports a mixture of a format for communicating an ACK/NACK signal and a format for communicating CQI signals.

11. The radio communication apparatus according to claim 10, wherein

in the physical resource block, the format for communicating an ACK/NACK signal is associated with a sequence defined by a first cyclic shift value and the format for communicating CQI signals is associated with a sequence defined by a second cyclic shift value different from the first cyclic shift value.

12. The radio communication apparatus according to claim 9, wherein

the plurality of orthogonal sequences include orthogonal sequences of [+1, +1, +1, +1] and [+1, −

1, −

1, +1] having a sequence length of 4 corresponding to 1st, 2nd, 6th and 7th symbols of 7 symbols included in the ACK/NACK signal transmission slot; and

the Nth symbol is the 2nd symbol and the Mth symbols is the 6th symbol.

13. The radio communication apparatus according to claim 9, further comprising:

a transmitting unit configured to transmit to a mobile station a signal for controlling the multiplying of the two reference signal sequences with values having opposite phases from each other.

14. A radio communication apparatus comprising:

a receiving unit configured to receive an acknowledgement or non-acknowledgement (ACK/NACK) signal that is spread with an orthogonal sequence, which is selected from a plurality of orthogonal sequences, the plurality of orthogonal sequences including more orthogonal sequences that render two values respectively corresponding to 2nd symbol and 6th symbol of an ACK/NACK signal transmission slot in phase, than orthogonal sequence(s) that render said two values in opposite phases from each other, each of the plurality of orthogonal sequences having a sequence length of 4 corresponding to 1st, 2nd, 6th and 7th symbols of 7 symbols included in the ACK/NACK signal transmission slot;

the spread ACK/NACK signal being arranged in the 1st, 2nd, 6th and 7th symbols of the ACK/NACK signal transmission slot and first reference signals (1st RS) being arranged in 3rd, 4th and 5th symbols of the ACK/NACK signal transmission slot;

a despreading unit configured to despread the ACK/NACK signal with said orthogonal sequence,

wherein the receiving unit is further configured to receive CQI signals arranged in 1st, 3rd, 4th, 5th and 7th symbols of a CQI signals transmission slot and to receive two second reference signals (2nd RS), which are produced by multiplying two reference signal sequences with values having opposite phases from each other and which are arranged in 2nd and 6th symbols of the CQI signals transmission slot; and

a demodulating unit configured to demodulate the CQI signals arranged in the CQI signals transmission slot.

15. The radio communication apparatus according to claim 14, wherein

the receiving unit receives the ACK/NACK signal and the first reference signals (1st RS) arranged in the ACK/NACK signal transmission slot or the second reference signals (2nd RS) and the CQI signals arranged in the CQI signals transmission slot using a physical resource that supports a mixture of a format for communicating an ACK/NACK signal and a format for communicating CQI signals.

16. The radio communication apparatus according to claim 15, wherein

in said physical resource block, the format for communicating an ACK/NACK signal is associated with a sequence defined by a first cyclic shift value and the format for communicating CQI signals is associated with a sequence defined by a second cyclic shift value different from the first cyclic shift value.