USER APPARATUS, BASE STATION APPARATUS AND METHOD

• US 20100046480A1
• Filed: 10/01/2007
• Published: 02/25/2010
• Est. Priority Date: 10/03/2006
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Sawahashi, Mamoru, Kawamura, Teruo, Higuchi, Kenichi
• Granted Patent: US 8,565,166 B2
• Time in Patent Office: Days
• US Class Current: 370/335
• CPC Class Codes: H04J 13/0059 CAZAC [constant-amplitude and zero auto-correlation]
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0081 Formats specially adapted to avoid errors in the feedback channel H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/006 Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

A user apparatus generates an uplink control channel including at least one of acknowledgement information and channel condition information on an downlink, and transmits the uplink control channel in a predefined dedicated band if no resource is assigned to transmit an uplink data channel. The uplink control channel includes multiple unit block sequences resulting from multiplication of the same factor with all chips of a CAZAC code sequence for the user apparatus.

Claims

1. A user apparatus for transmitting at least an uplink control channel to a base station apparatus in accordance with a single-carrier scheme, the user apparatus comprising:

an acknowledgement information generation unit configured to generate acknowledgement information indicating a positive response or a negative response to a downlink data channel;

a channel condition generation unit configured to generate channel condition information indicating a downlink channel condition;

a control channel generation unit configured to generate an uplink control channel including at least one of the acknowledgement information and the channel condition information; and

a transmission unit configured to transmit the uplink control channel in a predefined dedicated band if no resource is assigned to transmit an uplink data channel,

wherein the uplink control channel includes one or more unit blocks including a sequence resulting from multiplication of a uniform factor with all chips of an orthogonal code sequence for the user apparatus.

2. The user apparatus as claimed in claim 1, wherein the orthogonal code sequence comprises a CAZAC code sequence.

3. The user apparatus as claimed in claim 1, wherein the factor comprises “

+1”

or “

−

1”

.

4. The user apparatus as claimed in claim 1, wherein the acknowledgement information is represented in a set of factors multiplied with the one or more unit blocks.

5. The user apparatus as claimed in claim 4, wherein the acknowledgement information is represented in factors multiplied with some unit blocks of the unit blocks, and the channel condition information is represented in factors multiplied with other unit blocks of the unit blocks.

6. The user apparatus as claimed in claim 1, wherein individual bits for representing the channel condition information are represented in a set of factors multiplied with multiple unit blocks.

7. The user apparatus as claimed in claim 6, wherein the number of unit blocks corresponding to upper bits is greater than or equal to the number of unit blocks corresponding to lower bits.

8. The user apparatus as claimed in claim 1, wherein correspondence between assignment information of resources to uplink control channels and the orthogonal code sequence is set to derive the orthogonal code sequence uniquely from the assignment information.

9. The user apparatus as claimed in claim 8, wherein the correspondence is set such that if user multiplexing order is lower than or equal to a predefined first value, a code division multiplexing scheme with a first CAZAC code sequence is applied in a first band within the dedicated band and if the user multiplexing order is higher than the first value and lower than or equal to a predefined second value, the code division multiplexing scheme with the first CAZAC code sequence is applied in a second band within the dedicated band.

10. The user apparatus as claimed in claim 9, wherein the correspondence is set such that if the user multiplexing order is higher than the second value and lower than or equal to a predefined third value, a code division multiplexing scheme with a second CAZAC code sequence is applied in the first band within the dedicated band and if the user multiplexing order is higher than the third value, the code division multiplexing scheme with the second CAZAC code sequence is applied in the second band within the dedicated band.

11. The user apparatus as claimed in claim 1, wherein the orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents.

12. A method for use in a user apparatus for transmitting at least an uplink control channel to a base station apparatus in accordance with a single-carrier scheme, the method comprising:

generating an uplink control channel including at least one of acknowledgement information and channel condition information, the acknowledgement information indicating a positive response or a negative response to a downlink data channel, the channel condition information indicating a downlink channel condition; and

transmitting the uplink control channel in a predefined dedicated band if no resource is assigned to transmit an uplink data channel,

wherein the uplink control channel includes one or more unit blocks including a sequence resulting from multiplication of a uniform factor with all chips of an orthogonal code sequence for the user apparatus.

13. A base station apparatus for receiving at least an uplink control channel from multiple user apparatuses in accordance with a single-carrier scheme, the base station apparatus comprising:

an extraction unit configured to extract at least one of acknowledgement information and channel condition information from an uplink control channel, the acknowledgement information indicating a positive response or a negative response to a downlink data channel, the channel condition information indicating a downlink channel condition;

a scheduling unit configured to schedule a new packet or a retransmission packet based on the channel condition information and the acknowledgement information; and

a transmission unit configured to transmit the new packet or the retransmission packet in a downlink data channel, wherein

the uplink control channel includes one or more unit blocks including a sequence resulting from multiplication of a uniform factor with all chips in an orthogonal code sequence for the user apparatuses, and

the extraction unit is configured to identify contents of at least one of the acknowledgement information and the channel condition information by determining factors multiplied with unit blocks.

14. The base station apparatus as claimed in claim 13, wherein

the orthogonal code sequence comprises a CAZAC code sequence, and

the base station apparatus indicates orthogonal code sequences and transmission bands to the user apparatuses to apply a code division multiplexing scheme with a first CAZAC code sequence in a first band within a band dedicated to an uplink control channel if user multiplexing order is lower than or equal to a predefined first value and to apply the code division multiplexing scheme with the first CAZAC code sequence in a second band within the dedicated band if the user multiplexing order is higher than the first value and lower than or equal to a predefined second value.

15. The base station apparatus as claimed in claim 14, wherein the base station apparatus indicates orthogonal code sequences and transmission bands to the user apparatuses to apply the code division multiplexing scheme with a second CAZAC code sequence in the first band within the dedicated band if the user multiplexing order is higher than the second value and lower than or equal to a predefined third value and to apply the code division multiplexing scheme with the second CAZAC code sequence in the second band within the dedicated band if the user multiplexing order is higher than the third value.

16. The base station apparatus as claimed in claim 13, wherein the orthogonal code sequence in the unit blocks is used as a reference signal for one or more of channel estimation, path search and synchronization detection.

17. The base station apparatus as claimed in claim 13, wherein the orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents.

18. A method for use in a base station apparatus for receiving at least an uplink control channel from multiple user apparatuses in accordance with a single-carrier scheme, the method comprising:

extracting at least one of acknowledgement information and channel condition information from an uplink control channel, the acknowledgement information indicating a positive response or a negative response to a downlink data channel, the channel condition information indicating a downlink channel condition;

scheduling a new packet or a retransmission packet based on the channel condition information and the acknowledgement information; and

transmitting the new packet or the retransmission packet in a downlink data channel, wherein

the uplink control channel includes one or more unit blocks including a sequence resulting from multiplication of a uniform factor with all chips in an orthogonal code sequence for the user apparatuses, and

the extracting at least one of acknowledgement information and channel condition information comprises identifying contents of at least one of the acknowledgement information and the channel condition information by determining factors multiplied with unit blocks.

19. A user apparatus for transmitting at least an uplink control channel to a base station apparatus in accordance with a single-carrier scheme, the user apparatus comprising:

an acknowledgement information generation unit configured to generate acknowledgement information indicative of a positive response or a negative response to a downlink data channel;

a channel condition information generation unit configured to generate channel condition information indicative of a downlink channel condition;

a control channel generation unit configured to generate an uplink control channel including at least one of the acknowledgement information and the channel condition information; and

a transmission unit configured to transmit the uplink control channel in a predefined dedicated band if no resource is assigned to transmit an uplink data channel, wherein

the uplink control channel includes multiple unit blocks of a predefined data size, and

an orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents.

20. A method for use in a user apparatus for transmitting at least an uplink control channel to a base station apparatus in accordance with a single-carrier scheme, the method comprising:

generating an uplink control channel including at least one of acknowledgement information and channel condition information, the acknowledgement information indicating a positive response or a negative response to a downlink data channel, the channel condition information indicating a downlink channel condition; and

transmitting the uplink control channel in a predefined dedicated band if no resource is assigned to transmit an uplink data channel, wherein

the uplink control channel includes multiple unit blocks of a predefined data size, and

an orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents.

21. A base station apparatus for receiving at least an uplink control channel from multiple user apparatuses in accordance with a single-carrier scheme, the base station apparatus comprising:

an extraction unit configured to extract at least one of acknowledgement information and channel condition information from an uplink control channel, the acknowledgement information indicating a positive response or a negative response to a downlink data channel, the channel condition information indicating a downlink channel condition;

a scheduling unit configured to schedule a new packet or a retransmission packet based on the channel condition information and the acknowledgement information; and

a transmission unit configured to transmit the new packet or the retransmission packet in a downlink data channel, wherein

the uplink control channel includes multiple unit blocks of a predefined data size,

an orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents, and

the extraction unit is configured to identify contents of at least one of the acknowledgement information and the channel condition information by determining other factors multiplied with unit blocks.

22. A method for use in a base station apparatus for receiving at least an uplink control channel from multiple user apparatuses in accordance with a single-carrier scheme, the method comprising:

extracting at least one of acknowledgement information and channel condition information from an uplink control channel, the acknowledgement information indicating a positive response or a negative response to a downlink data channel, the channel condition information indicating a downlink channel condition;

scheduling a new packet or a retransmission packet based on the channel condition information and the acknowledgement information; and

transmitting the new packet or the retransmission packet in a downlink data channel, wherein

the uplink control channel includes multiple unit blocks of a predefined data size,

an orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents, and

the extracting at least one of acknowledgement information and channel condition information comprises identifying contents of at least one of the acknowledgement information and the channel condition information by determining other factors multiplied with unit blocks.

23. A user apparatus for transmitting at least an uplink control channel to a base station apparatus in accordance with a single-carrier scheme, the user apparatus comprising:

an acknowledgement information generation unit configured to generate acknowledgement information indicative of a positive response or a negative response to a downlink data channel;

a channel condition information generation unit configured to generate channel condition information indicative of a downlink channel condition;

a control channel generation unit configured to generate an uplink control channel including at least one of the acknowledgement information and the channel condition information; and

a transmission unit configured to transmit the uplink control channel in a predefined dedicated band if no resource is assigned to transmit an uplink data channel, wherein

the uplink control channel includes multiple unit blocks of a predefined data size,

an orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents, and

the unit blocks result from multiplication of a spreading code sequence with the control channel.

24. A method for use in a user apparatus for transmitting at least an uplink control channel to a base station apparatus in accordance with a single-carrier scheme, the method comprising:

generating an uplink control channel including at least one of acknowledgement information and channel condition information, the acknowledgement information indicating a positive response or a negative response to a downlink data channel, the channel condition information indicating a downlink channel condition; and

transmitting the uplink control channel in a predefined dedicated band if no resource is assigned to transmit an uplink data channel, wherein

the uplink control channel includes multiple unit blocks of a predefined data size,

an orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents, and

the unit blocks result from multiplication of a spreading code sequence with the control channel.

25. A base station apparatus for receiving at least an uplink control channel from multiple user apparatuses in accordance with a single-carrier scheme, the base station apparatus comprising:

an extraction unit configured to extract at least one of acknowledgement information and channel condition information from an uplink control channel, the acknowledgement information indicating a positive response or a negative response to a downlink data channel, the channel condition information indicating a downlink channel condition;

a scheduling unit configured to schedule a new packet or a retransmission packet based on the channel condition information and the acknowledgement information; and

a transmission unit configured to transmit the new packet or the retransmission packet in a downlink data channel, wherein

the uplink control channel includes multiple unit blocks of a predefined data size,

an orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents,

the unit blocks result from multiplication of a spreading code sequence with the control channel, and

the extraction unit is configured to identify at least one of the acknowledgement information and the channel condition information by determining other factors multiplied with unit blocks.

26. A method for use in a base station apparatus for receiving at least an uplink control channel from multiple user apparatuses in accordance with a single-carrier scheme, the base method comprising:

extracting at least one of acknowledgement information and channel condition information from an uplink control channel, the acknowledgement information indicating a positive response or a negative response to a downlink data channel, the channel condition information indicating a downlink channel condition;

scheduling a new packet or a retransmission packet based on the channel condition information and the acknowledgement information; and

transmitting the new packet or the retransmission packet in a downlink data channel, wherein

the uplink control channel includes multiple unit blocks of a predefined data size,

an orthogonal code sequence is represented in a set of factors multiplied with multiple unit blocks having the same contents,

the unit blocks result from multiplication of a spreading code sequence with the control channel, and

the extracting at least one of acknowledgement information and channel condition information comprises identifying at least one of the acknowledgement information and the channel condition information by determining other factors multiplied with unit blocks.