Method and apparatus for allocating and acquiring ACK/NACK resources in a mobile communication system
A method for allocating resources for transmission of an uplink Acknowledgement (ACK)/Negative ACK (NACK) used for indicating success/failure in reception of downlink transmission data by a base station in a mobile communication system. The resource allocation method includes determining a mapping rule between control channel elements constituting a downlink control channel and resources for ACK/NACK transmission; transmitting, to at least one User Equipment (UE), control information used for indicating to acquire the determined mapping rule and resources for ACK/NACK transmission allocated using the mapping rule; transmitting a downlink data channel though a predetermined scheduling operation; and transmitting the downlink control channel to the UE.
1. A method for receiving ACKnowledgement (ACK)/Negative ACK (NACK) information by a base station in a mobile communication system, the method comprising:
transmitting data and control information to at least one User Equipment (UE), the control information being transmitted through a downlink control channel including at least one control channel element (CCE);
checking a resource for reception of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for reception of the ACK/NACK, the resource for reception of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and
receiving the ACK/NACK information for the transmitted data using the checked resource,
wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index, the orthogonal sequence index, and the resource block index of resources for reception of the ACK/NACK sequentially increase one by one.
2. The method of claim 1 , wherein the at least one CCE is the first CCE of the downlink control channel.
3. The method of claim 1 , further comprising:
transmitting a cyclic shift offset value that indicates the number of sample intervals of which a sequence is cyclic-shifted.
4. A method for transmitting Acknowledgement (ACK)/Negative ACK (NACK) information by a User Equipment (UE) in a mobile communication system, the method comprising:
receiving data and control information from a base station, the control information being received through a downlink control channel including at least one control channel element (CCE);
acquiring a resource for transmission of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for transmission of the ACK/NACK, the resource for transmission of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and
transmitting the ACK/NACK information for the received data using the acquired resource,
wherein the mapping rule is that as index corresponding to a CCE sequentially increases, the cyclic shift index, the orthogonal sequence index, and the resource block index of resources for transmission of the ACK/NACK sequentially increase one by one.
5. The method of claim 4 , wherein the at least one CCE is the first CCE of the downlink control channel.
6. The method of claim 4 , further comprising:
receiving a cyclic shift offset value that indicates the number of sample intervals of which a sequence is cyclic-shifted,
acquiring the number of sample intervals of which the sequence is cyclic-shifted.
7. An apparatus for receiving Acknowledgement (ACK)/Negative ACK (NACK) information at a base station in a mobile communication system, the apparatus comprising:
a transmitter for transmitting data and control information to at least one User Equipment (UE), the control information being transmitted through a downlink control channel including at least one control channel element (CCE);
a controller for checking a resource for reception of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for reception of the ACK/NACK, the resource for reception of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index;
a receiver for receiving the ACK/NACK information for the transmitted data using the checked resource,
wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index, the orthogonal sequence index, and the resource block index of resources for transmission of the ACK/NACK sequentially increase one by one.
8. The apparatus of claim 7 , wherein the at least one CCE is the first CCE of the downlink control channel.
9. The apparatus of claim 7 , wherein the transmitter transmits a cyclic shift offset value that indicates the number of sample intervals of which a sequence is cyclic-shifted.
10. An apparatus for transmitting Acknowledgement (ACK)/Negative ACK (NACK) information at a User Equipment (UE) in a mobile communication system, the apparatus comprising:
a receiver for receiving data and control information from a base station, the control information being received through a downlink control channel including at least one control channel element (CCE);
a controller for acquiring a resource for transmission of an ACK/NACK mapped to at least one CCE based on a mapping rule between CCEs and resources for transmission of the ACK/NACK, the resource for transmission of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and
a transmitter for transmitting the ACK/NACK information for the received data using the acquired resource,
wherein the mapping rule is that as index corresponding to a CCE sequentially increases, the cyclic shift index, the orthogonal sequence index, and the resource block index of resources for transmission of the ACK/NACK sequentially increase one by one.
11. The apparatus of claim 10 , wherein the at least one CCE is the first CCE of the downlink control channel.
12. The apparatus of claim 10 , wherein the receiver receives a cyclic shift offset value that indicates the number of sample intervals of which a sequence is cyclic-shifted, and the controller acquires the number of sample intervals of which the sequence is cyclic-shifted.
13. A method for receiving Acknowledgement (ACK)/Negative ACK (NACK) information by a base station in a mobile communication system, the method comprising:
transmitting data and control information to at least one User Equipment (UE), the control information being transmitted through a downlink control channel including at least one control channel element (CCE);
checking a resource for reception of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for reception of the ACK/NACK, the resource for reception of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and
receiving the ACK/NACK information for the transmitted data using the checked resource,
wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index, the orthogonal sequence index, and the resource block index of resources for reception of the ACK/NACK increase by:
a) sequentially increasing the cyclic shift index, after the orthogonal sequence index and the resource block index are set to an initial value,
b) if the cyclic shift index is exhausted, increasing the orthogonal sequence index by one and then sequentially increasing the cyclic shift index from the initial value,
c) repeating step (b) until the orthogonal sequence index is exhausted,
d) if the orthogonal sequence index is exhausted, increasing the resource block index by one and then setting the orthogonal sequence index and the cyclic shift index to the initial value,
e) sequentially increasing the cyclic shift index from the initial value, and
f) repeating steps (b), (c), (d) and (e) until the resource block index is exhausted.
14. The method of claim 13 , wherein the at least one CCE is the first CCE of the downlink control channel.
15. The method of claim 13 , further comprising:
transmitting a cyclic shift offset value that indicates the number of sample intervals of which a sequence is cyclic-shifted.
16. A method for transmitting Acknowledgement (ACK)/Negative ACK (NACK) information by a User Equipment (UE) in a mobile communication system, the method comprising:
receiving data and control information from a base station, the control information being received through a downlink control channel including at least one control channel element (CCE);
acquiring a resource for transmission of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for transmission of the ACK/NACK, the resource for transmission of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and
transmitting the ACK/NACK information for the received data using the acquired resource,
wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index, the orthogonal sequence index, and the resource block index of resources for reception of the ACK/NACK increase by:
a) sequentially increasing the cyclic shift index, after the orthogonal sequence index and the resource block index are set to an initial value,
b) if the cyclic shift index is exhausted, increasing the orthogonal sequence index by one and then sequentially increasing the cyclic shift index from the initial value,
c) repeating step (b) until the orthogonal sequence index is exhausted,
d) if the orthogonal sequence index is exhausted, increasing the resource block index by one and then setting the orthogonal sequence index and the cyclic shift index to the initial value,
e) sequentially increasing the cyclic shift index from the initial value, and
f) repeating steps (b), (c), (d) and (e) until the resource block index is exhausted.
17. The method of claim 16 , wherein the at least one CCE is the first CCE of the downlink control channel.
18. The method of claim 16 , further comprising;
receiving a cyclic shift offset value that indicates the number of sample intervals of which a sequence is cyclic-shifted,
acquiring the number of sample intervals of which the sequence is cyclic-shifted.
19. An apparatus for receiving Acknowledgement (ACK)/Negative ACK (NACK) information at a base station in a mobile communication system, the apparatus comprising:
a transmitter for transmitting data and control information to at least one User Equipment (UE), the control information being transmitted through a downlink control channel including at least one control channel element (CCE);
a controller for checking a resource for reception of an ACK/NACK mapped to the at least one CCE based on a mapping rule between CCEs and resources for reception of the ACK/NACK, the resource for reception of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index;
a receiver for receiving the ACK/NACK information for the transmitted data using the checked resource,
wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index, the orthogonal sequence index, and the resource block index of resources for reception of the ACK/NACK increase by:
a) sequentially increasing the cyclic shift index, after the orthogonal sequence index and the resource block index are set to an initial value,
b) if the cyclic shift index is exhausted, increasing the orthogonal sequence index by one and then sequentially increasing the cyclic shift index from the initial value,
c) repeating step (b) until the orthogonal sequence index is exhausted,
d) if the orthogonal sequence index is exhausted, increasing the resource block index by one and then setting the orthogonal sequence index and the cyclic shift index to the initial value,
e) sequentially increasing the cyclic shift index from the initial value, and
f) repeating steps (b), (c), (d) and (e) until the resource block index is exhausted.
20. The apparatus of claim 19 , wherein the at least one CCE is the first CCE of the downlink control channel.
21. The apparatus of claim 19 , wherein the transmitter transmits a cyclic shift offset value that indicates the number of sample intervals of which a sequence is cyclic-shifted.
22. An apparatus for transmitting Acknowledgement (ACK)/Negative ACK (NACK) information at a User Equipment (UE) in a mobile communication system, the apparatus comprising:
a receiver for receiving data and control information from a base station, the control information being received through a downlink control channel including at least one control channel element (CCE);
a controller for acquiring a resource for transmission of an ACK/NACK mapped to at least one CCE based on a mapping rule between CCEs and resources for transmission of the ACK/NACK, the resource for transmission of the ACK/NACK identified by a cyclic shift index, an orthogonal sequence index, and a resource block index; and
a transmitter for transmitting the ACK/NACK information for the received data using the acquired resource,
wherein the mapping rule is that as an index corresponding to a CCE sequentially increases, the cyclic shift index, the orthogonal sequence index, and the resource block index of resources for reception of the ACK/NACK increase by:
a) sequentially increasing the cyclic shift index, after the orthogonal sequence index and the resource block index are set to an initial value,
b) if the cyclic shift index is exhausted, increasing the orthogonal sequence index by one and then sequentially increasing the cyclic shift index from the initial value,
c) repeating step (b) until the orthogonal sequence index is exhausted,
d) if the orthogonal sequence index is exhausted, increasing the resource block index by one and then setting the orthogonal sequence index and the cyclic shift index to the initial value,
e) sequentially increasing the cyclic shift index from the initial value, and
f) repeating steps (b), (c), (d) and (e) until the resource block index is exhausted.
23. The apparatus of claim 22 , wherein the at least one CCE is the first CCE of the downlink control channel.
24. The apparatus of claim 22 , wherein the receiver receives a cyclic shift offset value that indicates the number of sample intervals of which a sequence is cyclic-shifted, the controller acquires the number of sample intervals of which the sequence is cyclic-shifted.