Performing a random access procedure in a carrier aggregation with at least one SCell operating in an unlicensed spectrum
AssigneeLG Electronics Inc.
InventorsSunyoung Lee, Seungjune Yi
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Abstract
A method and a device for performing a random access procedure in a carrier aggregation with at least one SCell operating in an unlicensed spectrum are disclosed. The method includes: configuring a timer; starting the timer when the UE initiates a Random Access Preamble (RAP) transmission procedure on a first cell; and stopping the RAP transmission procedure on the first cell if a Random Access Response (RAR) for the RAP transmission procedure on the first cell is not received until the timer expires.
Claims10
A method for a User Equipment (UE) operating in a wireless communication system, the method comprising:
- initiating a Random Access Preamble (RAP) transmission procedure on an unlicensed Secondary Cell (SCell), wherein a timer is started when the UE initiates the RAP transmission procedure on the unlicensed SCell;
- stopping the RAP transmission procedure on the unlicensed SCell when a certain condition is met, wherein the certain condition is met when the RAP has not been transmitted within a predefined number of subframes from a subframe where the timer expires, even when a number of the RAP transmissions is less than a threshold value;
- and
- transmitting, to a Base Station (BS), information on the UE stopping the RAP transmission procedure on the unlicensed SCell through a cell configured for the UE when the RAP transmission procedure on the unlicensed SCell is stopped.
A User Equipment (UE) operating in a wireless communication system, the UE comprising:
- a Radio Frequency (RF) module;
- and
- a processor operably coupled with the RF module and configured to:
- initiate a Random Access Preamble (RAP) transmission procedure on an unlicensed Secondary Cell (SCell), wherein a timer is started when the processor initiates the RAP transmission procedure on the unlicensed SCell;
- stop the RAP transmission procedure on the unlicensed SCell when a certain condition is met, wherein the certain condition is met when the RAP has not been transmitted within a predefined number of subframes from a subframe where the timer expires, even when a number of the RAP transmissions is less than a threshold value;
- and
- transmit, to a base station (BS), information on the processor stopping the RAP transmission procedure on the unlicensed SCell through a cell configured for the UE when the RAP transmission procedure on the unlicensed SCell is stopped.
Dependencies are inferred from the claim text.