Method and apparatus for carrier assignment, configuration and switching for multicarrier wireless
As part of carrier assignment and configuration for multicarrier wireless communications, a single uplink (UL) primary carrier may provide control information for multiple concurrent downlink (DL) carriers. Optionally, control information for each DL carrier may be transmitted over paired UL carriers. Carrier switching of UL and/or DL carriers, including primary and anchor carriers, may occur during normal operation or during handover, and may occur in only the UL or only the DL direction. A unidirectional handover is performed when only an UL carrier or only a DL carrier is switched as part of a handover. Switching of UL and/or DL carriers may be from one component carrier or a subset of carriers to another component carrier, another subset of carriers, or all carriers in the same direction.
1. A first wireless transmit/receive unit, WTRU, comprising:
a processor configured to at least:
receive a radio resource control (RRC) message comprising configuration information that indicates a first set of physical uplink channel (PUCCH) resources for scheduling request (SR) reporting and a second set of PUCCH resources for SR reporting, wherein the first set of PUCCH resources is associated with a first uplink (UL) carrier of a first set of UL carriers, and wherein the second set of PUCCH resources is associated with a second UL carrier of a second set of UL carriers;
determine, based on a decision condition, that an SR is to be reported using one of the indicated first set of PUCCH resources or the indicated second set of PUCCH resources; and
send the SR using the determined one of the indicated first set of PUCCH resources or the indicated second set of PUCCH resources.
2. The WTRU of claim 1 , wherein the decision condition comprises determining that UL data associated with one of the first UL carrier or the second UL carrier is available for transmission.
3. The WTRU of claim 1 , wherein the decision condition comprises determining that UL data associated with the first set of UL carriers or with the second set of UL carriers is available for transmission.
4. The WTRU of claim 1 , wherein the decision condition comprises determining that uplink shared channel resources are needed for one of the first UL carrier or the second UL carrier.
5. The WTRU of claim 1 , wherein the decision condition comprise determining that uplink shared channel resources are needed for one of the first set of UL carriers or one of the second set of UL carriers.
6. The WTRU of claim 1 , wherein the decision condition comprises the processor being configured to determine that uplink shared channel resources are needed for a carrier of the first set of UL carriers or a carrier of the second set of UL carriers.
7. The WTRU of claim 1 , wherein the first UL carrier is associated with a first cell and the second UL carrier is associated with a second cell.
8. The WTRU of claim 1 , wherein the SR is a periodic SR.
9. A method comprising:
receiving a radio resource control (RRC) message comprising configuration information that indicates a first set of physical uplink channel (PUCCH) resources for scheduling request (SR) reporting and a second set of PUCCH resources for SR reporting, wherein the first set of PUCCH resources is associated with a first uplink (UL) carrier of a first set of UL carriers, and wherein the second set of PUCCH resources is associated with a second UL carrier of a second set of UL carriers;
determining, based on a decision condition, that an SR is to be reported using one of the indicated first set of PUCCH resources or the indicated second set of PUCCH resources; and
sending the SR using the determined one of the indicated first set of PUCCH resources or the indicated second set of PUCCH resources.
10. The method of claim 9 , wherein the decision condition comprises determining that UL data associated with one of the first UL carrier or the second UL carrier is available for transmission.
11. The method of claim 9 , wherein the decision condition comprises determining that UL data associated with the first set of UL carriers or with the second set of UL carriers is available for transmission.
12. The method of claim 9 , wherein the decision condition comprises determining that uplink shared channel resources are needed for one of the first UL carrier or the second UL carrier.
13. The method of claim 9 , wherein the decision condition comprises determining that uplink shared channel resources are needed for one of the first set of UL carriers or one of the second set of UL carriers.
14. The method of claim 9 , wherein the decision condition comprises determining that uplink shared channel resources are needed for a carrier of the first set of UL carriers or a carrier of the second set of UL carriers.
15. The method of claim 9 , wherein the first UL carrier is associated with a first cell and the second UL carrier is associated with a second cell.
16. The method of claim 9 , wherein the SR is a periodic SR.