UE timing adjustment in a multi-RAT, carrier aggregation community system
First Claim
1. A method of operating a user equipment (UE) in a multiple radio access technology (multi-RAT) communications system, the user equipment comprising multi-RAT radio transmission circuitry and multi-RAT radio receiving circuitry, the method comprising:
- operating the multi-RAT radio receiving circuitry to concurrently receive at least a first downlink carrier associated with a first RAT and at least a second different downlink carrier associated with a second RAT, wherein the first and second RATs have different carrier bandwidths;
receiving on one of the first and second downlink carriers a common timing adjustment parameter value that is common to both the first and second RATs;
using the common timing adjustment parameter value to adjust a transmit timing of a first uplink carrier associated with the first RAT and of a second uplink carrier associated with the second RAT independently from using a downlink common reference signal to adjust the transmission timing of the first uplink carrier and the second uplink carrier.
1 Assignment
0 Petitions
Accused Products
Abstract
A common uplink timing adjustment parameter value is estimated for UE transmissions in the multi-RAT communications network and provided for transmission to one or more UEs. That signaling parameter value is common to both the first and second RATs and useable by the one or more UEs to adjust transmit timing of uplink carriers belonging to the different RATs. The common timing adjustment parameter value may be provided, for example, in order to coordinate UE transmit timing of a first uplink carrier associated with the first RAT and of a second uplink carrier associated with the second RAT. A multi-RAT UE concurrently receives a first downlink carrier associated with the first RAT and a second different downlink carrier associated with the second RAT. The UE receives the common timing adjustment parameter value on one of those downlink carriers and adjusts a transmit timing of a first uplink carrier associated with the first RAT and of a second uplink carrier associated with the second RAT.
19 Citations
34 Claims
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1. A method of operating a user equipment (UE) in a multiple radio access technology (multi-RAT) communications system, the user equipment comprising multi-RAT radio transmission circuitry and multi-RAT radio receiving circuitry, the method comprising:
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operating the multi-RAT radio receiving circuitry to concurrently receive at least a first downlink carrier associated with a first RAT and at least a second different downlink carrier associated with a second RAT, wherein the first and second RATs have different carrier bandwidths; receiving on one of the first and second downlink carriers a common timing adjustment parameter value that is common to both the first and second RATs; using the common timing adjustment parameter value to adjust a transmit timing of a first uplink carrier associated with the first RAT and of a second uplink carrier associated with the second RAT independently from using a downlink common reference signal to adjust the transmission timing of the first uplink carrier and the second uplink carrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method in a multiple radio access technology (multi-RAT) communications network where radio communications between the network and user equipments (UEs) is performed using multi-RAT radio transmission circuitry and multi-RAT radio receiving circuitry, the method comprising:
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estimating a common uplink timing adjustment parameter value for UE transmissions in the multi-RAT communications network, and providing the common uplink timing adjustment parameter value for transmission to one or more UEs, wherein the common uplink timing adjustment parameter value is common to both a first RAT and a second different RAT and useable by the one or more UEs to adjust transmit timing of uplink carriers belonging to the first and second RATs independently from using a downlink common reference signal to adjust the transmission timing of the first uplink carrier and the second uplink carrier. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A user equipment (UE) for use in a multiple radio access technology (multi-RAT) communications system, the user equipment comprising:
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multi-RAT radio circuitry configured to concurrently receive at least a first downlink carrier associated with a first RAT and at least a second different downlink carrier associated with a second RAT, where the first and second RATs have different carrier bandwidths, where one of the first and second downlink carriers includes a common timing adjustment parameter value that is common to both the first and second RATs, and a data processor configured to use the common timing adjustment parameter value to adjust a transmit timing of a first uplink carrier associated with the first RAT and of a second uplink carrier associated with the second RAT independently from using a downlink common reference signal to adjust the transmission timing of the first uplink carrier and the second uplink carrier. - View Dependent Claims (24, 25, 26, 27, 28)
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29. Apparatus in a multiple radio access technology (multi-RAT) communications network where radio communications between the network and user equipments (UEs) is performed using multi-RAT radio transmission circuitry and multi-RAT radio receiving circuitry, the apparatus comprising:
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data processor circuitry configured to estimate a common uplink timing adjustment parameter value for UE transmissions in the multi-RAT communications network, and communications circuitry configured to provide the common uplink timing adjustment parameter value for transmission to one or more UEs, wherein the common uplink timing adjustment parameter value is common to both a first RAT and a second different RAT and useable by the one or more UEs to adjust transmit timing of uplink carriers belonging to the first and second RATs independently from using a downlink common reference signal to adjust the transmission timing of the first uplink carrier and the second uplink carrier. - View Dependent Claims (30, 31, 32, 33, 34)
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Specification