MAINTAINING TIME ALIGNMENT WITH MULTIPLE UPLINK CARRIERS
First Claim
1. A wireless transmit/receive unit (WTRU), comprising:
- a processor, the processor configured, at least in part to;
identify one or more uplink carriers with which the WTRU is capable of operating; and
determine one or more uplink component carrier sets (UL CC sets), each of the UL CC sets comprising one or more of the uplink carriers, each of the one or more uplink carriers that comprise a respective UL CC set being capable of operating with the same Timing Advance (TA).
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Accused Products
Abstract
Maintaining time alignment with multiple carriers is contemplated. A group of uplink carriers (UL CC sets) that operate with a single Timing Advance (TA) may be determined, and a TA value may be applied to a specific UL CC set. A wireless transmit/receive unit'"'"'s (WTRU) capability of using multiple TAs may define a group index of a few bits for each UL CC set. A TA Command received in a Random Access Response message may be used to apply the TA value to each UL carrier of the UL CC set. The WTRU may determine which UL CC set the TA value applies to based on which DL carrier the command was transmitted from. The WTRU may determine which UL CC set the TA value applies to based on the Group Index being explicitly provided in the command. The WTRU may release multi-CC configurations upon Time Alignment Timer (TAT) expiry.
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Citations
20 Claims
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1. A wireless transmit/receive unit (WTRU), comprising:
a processor, the processor configured, at least in part to; identify one or more uplink carriers with which the WTRU is capable of operating; and determine one or more uplink component carrier sets (UL CC sets), each of the UL CC sets comprising one or more of the uplink carriers, each of the one or more uplink carriers that comprise a respective UL CC set being capable of operating with the same Timing Advance (TA). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for establishing timing advance, comprising:
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identifying one or more uplink carriers operating on a wireless communication network; and determine one or more uplink component carrier sets (UL CC sets), each of the UL CC sets comprising one or more of the uplink carriers, each of the one or more uplink carriers that comprise a respective UL CC set being capable of operating with the same Timing Advance (TA). - View Dependent Claims (15, 16, 17)
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18. An evolved Node B (eNodeB), comprising:
a processor, the processor configured, at least in part, to; identify one or more uplink carriers with which the eNodeB is capable of operating; determine one or more indices, each of the one or more indices corresponding respectively to one or more uplink component carrier sets (UL CC sets), each of the UL CC sets comprising one or more of the uplink carriers, each of the one or more uplink carriers that comprise a respective UL CC set being capable of operating with the same Timing Advance (TA); and transmit the one or more indices. - View Dependent Claims (19, 20)
Specification