TRANSMITTING PARTICULAR CONTROL INFORMATION ON AN UPLINK TRAFFIC CHANNEL ON A REPEATED BASIS

1 . A method comprising:

receiving, by a mobile station, a downlink control message associated with an indication that particular control information is to be transmitted by the mobile station on an uplink traffic channel on a repeated basis; and

in response to receiving the downlink control message associated with the indication, the mobile station transmitting the particular control information on the uplink traffic channel to a base station on a repeated basis.

2 . The method of claim 1 , wherein transmitting the particular control information on the repeated basis comprises transmitting the particular control information on a periodic basis.

3 . The method of claim 2 , wherein transmitting the particular control information on the periodic basis is performed as part of semi-persistent scheduling, wherein the repeated transmitting of the particular control information uses one or more of the same transport block size, modulation and coding scheme, and channel resources.

4 . The method of claim 1 , wherein receiving the downlink control message associated with the indication comprises receiving the downlink control message having a portion scrambled with the indication.

5 . The method of claim 4 , wherein receiving the downlink control message having the portion scrambled within the indication comprises receiving the downlink control message having the portion scrambled with a semi-persistent scheduling radio network temporary identifier.

6 . The method of claim 1 , further comprising decoding the downlink control message with the scrambled portion to detect that the semi-persistent scheduling is to be set up at the mobile station.

7 . The method of claim 1 , wherein transmitting the particular control information comprises transmitting one or more of a rank indicator, a channel quality indicator, a precoding matrix indicator, and a hybrid automatic repeat request (HARQ) acknowledgment.

8 . The method of claim 1 , wherein receiving the downlink control message comprises receiving downlink control information according to Evolved Universal Terrestrial Radio Access (EUTRA) DCI format 0.

9 . A method comprising:

sending, by a base station, a downlink control message associated with an indication that particular control information is to be transmitted by a mobile station on an uplink traffic channel on a repeated basis; and

receiving, by the base station, the particular control information on the uplink traffic channel on a repeated basis, wherein the particular control information is transmitted by the mobile station in response to the downlink control message associated with the indication.

10 . The method of claim 9 , wherein receiving the particular control information on the repeated basis comprises transmitting the particular control information on a periodic basis according to semi-persistent scheduling.

11 . The method of claim 9 , wherein sending the downlink control message associated with the indication comprises receiving the downlink control message having a portion scrambled with the indication.

12 . The method of claim 11 , wherein sending the downlink control message having the portion scrambled within the indication comprises receiving the downlink control message having the portion scrambled with a semi-persistent scheduling radio network temporary identifier.

13 . The method of claim 9 , wherein receiving the particular control information comprises receiving one or more of a rank indicator, a channel quality indicator, a precoding matrix indicator, and a hybrid automatic repeat request (HARQ) acknowledgment.

14 . A mobile station comprising:

an interface to a wireless link; and

at least one processor configured to:

receive a downlink control message associated with an indication that particular control information is to be transmitted by the mobile station on an uplink traffic channel on a repeated basis; and

in response to receiving the downlink control message associated with the indication, cause the particular control information to be transmitted on the uplink traffic channel to a base station on a repeated basis.

15 . The mobile station of claim 14 , wherein the particular control information is transmitted on a periodic basis as part of semi-persistent scheduling.

16 . The mobile station of claim 14 , wherein the downlink control message has a portion scrambled with the indication.

17 . The mobile station of claim 16 , wherein the indication comprises a semi-persistent scheduling radio network temporary identifier.

18 . The mobile station of claim 14 , wherein the particular control information comprises one or more of a rank indicator, a channel quality indicator, a precoding matrix indicator, and a hybrid automatic repeat request (HARQ) acknowledgment.

19 . A base station comprising:

an interface to a wireless link; and

at least one processor configured to:

send a downlink control message associated with an indication that particular control information is to be transmitted by a mobile station on an uplink traffic channel on a repeated basis; and

receive the particular control information on the uplink traffic channel on a repeated basis, wherein the particular control information is transmitted by the mobile station in response to the downlink control message associated with the indication.

20 . The base station of claim 19 , wherein the downlink control message has a portion scrambled with the indication.

21 . The base station of claim 19 , wherein the particular control information comprises one or more of a rank indicator, a channel quality indicator, a precoding matrix indicator, and a hybrid automatic repeat request (HARQ) acknowledgment.

22 . A communications system comprising:

a base station; and

a mobile station, wherein the mobile station is configured to:

receive a downlink control message associated with an indication that particular control information is to be transmitted by the mobile station on an uplink traffic channel on a repeated basis; and

in response to receiving the downlink control message associated with the indication, transmit the particular control information on the uplink traffic channel to a base station on a repeated basis.