Carrier grouping in multicarrier communications
First Claim
Patent Images
1. A method for use in a wireless device, said method comprising:
- a) receiving at least one radio resource control message comprising;
(i) configuration parameters of a plurality of carriers comprising a first carrier and at least one second carrier; and
(ii) a carrier group index for a second carrier in said at least one second carrier, said carrier group index identifying a carrier group in a plurality of carrier groups comprising;
(1) a first carrier group comprising a first subset of said plurality of carriers; and
(2) a second carrier group comprising a second subset of said at least one second carrier;
b) receiving downlink signals from a base station on said plurality of carriers, wherein said downlink signals on said plurality of carriers are time aligned with each other;
c) transmitting uplink signals to said base station on said plurality of carriers; and
d) receiving at least one time alignment command comprising a time adjustment value and an index identifying one carrier group;
wherein uplink transmissions on said first carrier group and said second carrier group employ different synchronization signals on different carriers as timing reference and are adjusted in response to different time alignment commands.
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Accused Products
Abstract
A wireless device receives messages comprising parameters of carriers and carrier groups. Downlink transmissions on a first carrier and at least one second carrier are substantially time aligned with each other. The wireless device receives time alignment commands comprising a time adjustment value and an index identifying a carrier group. Uplink transmissions on a first carrier group and a second carrier group employ different synchronization signals on different carriers as timing reference and are adjusted in response to different time alignment commands.
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Citations
20 Claims
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1. A method for use in a wireless device, said method comprising:
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a) receiving at least one radio resource control message comprising; (i) configuration parameters of a plurality of carriers comprising a first carrier and at least one second carrier; and (ii) a carrier group index for a second carrier in said at least one second carrier, said carrier group index identifying a carrier group in a plurality of carrier groups comprising; (1) a first carrier group comprising a first subset of said plurality of carriers; and (2) a second carrier group comprising a second subset of said at least one second carrier; b) receiving downlink signals from a base station on said plurality of carriers, wherein said downlink signals on said plurality of carriers are time aligned with each other; c) transmitting uplink signals to said base station on said plurality of carriers; and d) receiving at least one time alignment command comprising a time adjustment value and an index identifying one carrier group; wherein uplink transmissions on said first carrier group and said second carrier group employ different synchronization signals on different carriers as timing reference and are adjusted in response to different time alignment commands. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless device comprising:
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a) one or more processors; and b) memory storing instructions that, when executed by said one or more processors, cause said wireless device to; i) receive at least one radio resource control message comprising; (1) configuration parameters of a plurality of carriers comprising a first carrier and at least one second carrier; and (2) a carrier group index for a second carrier in said at least one second carrier, said carrier group index identifying a carrier group in a plurality of carrier groups comprising; (a) a first carrier group comprising a first subset of said plurality of carriers; and (b) a second carrier group comprising a second subset of said at least one second carrier; ii) receive downlink signals from said base station on said plurality of carriers, wherein said downlink signals on said plurality of carriers are time aligned with each other; iii) transmit uplink signals to said base station on said plurality of carriers; and iv) receive at least one time alignment command comprising a time adjustment value and an index identifying one carrier group; wherein uplink transmissions on said first carrier group and said second carrier group employ different synchronization signals on different carriers as timing reference and are adjusted in response to different time alignment commands. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A base station comprising:
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a) one or more processors; and b) memory storing instructions that, when executed by said one or more processors, cause said base station to; i) transmit at least one radio resource control message comprising; (1) configuration parameters of a plurality of carriers comprising a first carrier and at least one second carrier; and (2) a carrier group index for a second carrier in said at least one second carrier, said carrier group index identifying a carrier group in a plurality of carrier groups comprising; (a) a first carrier group comprising a first subset of said plurality of carriers; and (b) a second carrier group comprising a second subset of said at least one second carrier; ii) transmit downlink signals on said plurality of carriers, wherein said downlink signals on said plurality of carriers are time aligned with each other; iii) receive uplink signals from said wireless device on said plurality of carriers; and iv) transmit to said wireless device at least one time alignment command comprising a time adjustment value and an index identifying one carrier group; wherein uplink transmissions on said first carrier group and said second carrier group employ different synchronization signals on different carriers as timing reference and are adjusted in response to different time alignment commands. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification