Apparatus and method for transmitting and receiving fast feedback information in broadband wireless communication system
An apparatus and method for operating a fast feedback channel in a broadband wireless communication system are provided. The method includes generating and transmitting a feedback signal through a fast feedback channel of a first mode, determining to switch a mode of the fast feedback channel from the first mode to a second mode, transmitting a signal for requesting the mode switching of the fast feedback channel through the fast feedback channel, and generating and transmitting a feedback signal through a fast feedback channel of the second mode.
1. A method for operating a mobile station in a wireless communication system, the method comprising:
transmitting a feedback signal through a fast feedback channel in a first mode;
transmitting a signal for requesting mode switching from the first mode to a second mode, through the fast feedback channel;
receiving feedback channel allocation information indicating the second mode from a base station, the feedback channel allocation information comprising a feedback period and the second mode to be switched; and
transmitting a feedback signal through the fast feedback channel in the second mode.
2. The method of claim 1 ,
wherein the first mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel.
3. The method of claim 2 , wherein the transmitting of the signal for requesting the mode switching comprises transmitting a code sequence, which is assigned for a request of the mode switching, through the fast feedback channel in the first mode.
4. The method of claim 1 ,
wherein the first mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel.
5. The method of claim 4 , wherein the transmitting of the signal for requesting the mode switching comprises transmitting a code sequence, which is assigned for a request of the mode switching, through the fast feedback channel in the second mode.
6. A method for operating a base station in a wireless communication system, the method comprising:
receiving a feedback signal through a fast feedback channel in a first mode;
receiving a signal for requesting mode switching through the fast feedback channel;
transmitting feedback channel allocation information indicating the mode switching, the feedback channel allocation information comprising a feedback period and a mode to be switched; and
receiving a feedback signal through the fast feedback channel in a second mode.
7. The method of claim 6 ,
wherein the first mode comprises a mode where a mobile station transmits a code sequence through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel.
8. The method of claim 7 , wherein a signal for requesting the mode switching is a code sequence which is assigned for a request of the mode switching and the code sequence is detected in the first mode.
9. The method of claim 6 ,
wherein the first mode comprises a mode where a mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel.
10. The method of claim 9 , wherein a signal for requesting the mode switching is a code sequence which is assigned for a request of the mode switching and the code sequence is detected in the second mode.
11. An apparatus for a mobile station in a wireless communication system, the apparatus comprising:
a transmitter configured to:
transmit a feedback signal through a fast feedback channel in a first mode, and
transmit a signal for requesting mode switching from the first mode to a second mode through the fast feedback channel; and
a receiver configured to receive feedback channel allocation information indicating the second mode from a base station, the feedback channel allocation information comprising a feedback period and the second mode to be switched,
wherein the transmitter is further configured to transmit a feedback signal through the fast feedback channel in the second mode.
12. The apparatus of claim 11 ,
wherein the first mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel.
13. The apparatus of claim 12 , wherein a signal for requesting the mode switching is a code sequence which is assigned for a request of the mode switching and the code sequence is transmitted in the first mode.
14. The apparatus of claim 11 ,
wherein the first mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel.
15. The apparatus of claim 14 , wherein a signal for requesting the mode switching is a code sequence which is assigned for a request of the mode switching and the code sequence is transmitted in the first mode.
16. An apparatus for a base station in a wireless communication system, the apparatus comprising:
a receiver configured to:
receive a feedback signal through a fast feedback channel in a first mode, and
receive a signal for requesting mode switching through the fast feedback channel; and
a transmitter configured to transmit feedback channel allocation information indicating the mode switching, the feedback channel allocation information comprising a feedback period and a mode to be switched,
wherein the receiver is further configured to receive a feedback signal through the fast feedback channel in a second mode.
17. The apparatus of claim 16 ,
wherein the first mode comprises a mode where a mobile station transmits a code sequence through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel.
18. The apparatus of claim 17 , wherein a signal for requesting the mode switching is a code sequence which is assigned for a request of the mode switching and the code sequence is detected in the first mode.
19. The apparatus of claim 16 ,
wherein the first mode comprises a mode where a mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel.
20. The apparatus of claim 19 , wherein a signal for requesting the mode switching is a code sequence which is assigned for a request of the mode switching and the code sequence is detected in the second mode.
21. A method for operating a mobile station in a wireless communication system, the method comprising:
transmitting a first feedback signal through a fast feedback channel in a first mode;
transmitting a first signal for indicating a switch to a second mode through the fast feedback channel in the first mode;
transmitting a second signal for requesting mode switching from the first mode to the second mode through the fast feedback channel in the second mode; and
transmitting a second feedback signal through the fast feedback channel in the second mode.
22. The method of claim 21 ,
wherein the first mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel.
23. A method for operating a base station in a wireless communication system, the method comprising:
receiving a first feedback signal through a fast feedback channel in a first mode;
receiving a first signal for indicating a switch to a second mode through the fast feedback channel in the first mode;
receiving a second signal for requesting mode switching from the first mode to the second mode through the fast feedback channel in the second mode; and
receiving a second feedback signal through the fast feedback channel in the second mode.
24. The method of claim 23 ,
wherein the first mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel.
25. An apparatus for a mobile station in a wireless communication system, the apparatus comprising:
a transmitter configured to:
transmit a first feedback signal through a fast feedback channel in a first mode,
transmit a first signal for indicating a switch to a second mode through the fast feedback channel in the first mode,
transmit a second signal for requesting mode switching from the first mode to the second mode through the fast feedback channel in the second mode, and
transmit a second feedback signal through the fast feedback channel in the second mode.
26. The apparatus of claim 25 ,
wherein the first mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel.
27. An apparatus for a base station in a wireless communication system, the apparatus comprising:
a receiver configured to:
receive a first feedback signal through a fast feedback channel in a first mode,
receive a first signal for indicating a switch to a second mode through the fast feedback channel in the first mode,
receive a second signal for requesting mode switching from the first mode to the second mode through the fast feedback channel in the second mode, and
receive a second feedback signal through the fast feedback channel in the second mode.
28. The apparatus of claim 27 ,
wherein the first mode comprises a mode where the mobile station transmits at least one pilot symbol and at least one feedback information symbol through the fast feedback channel, and
wherein the second mode comprises a mode where the mobile station transmits a code sequence through the fast feedback channel.