Method for performing a random access procedure in wireless communication system and a device therefor
AssigneeLG Electronics Inc.
InventorsSunyoung Lee, Jeonggu Lee
Life of this patent
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Abstract
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for transmitting a random access preamble (hereinafter, message 1); receiving a random access response (hereinafter, message 2) including a first uplink grant and a second uplink grant, as a response to the message 1; performing an initial transmission of a message 3 using the first uplink grant; starting a timer at a time when the initial transmission of a message 3 is performed; and performing a retransmission of the message 3 using the second uplink grant when the timer expires.
Claims14
A method for a user equipment to perform a random access procedure in a wireless communication system, the method comprising:
- transmitting a random access preamble (hereinafter, message 1);
- receiving a random access response (hereinafter, message 2) including a first uplink grant and a second uplink grant, as a response to the message 1;
- performing an initial transmission of a message 3 using the first uplink grant;
- starting a timer at a time when the initial transmission of a message 3 is performed;
- and
- performing a retransmission of the message 3 using the second uplink grant when the timer expires.
A User Equipment (UE) for 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:
- transmit a random access preamble (hereinafter, message 1),
- receive a random access response (hereinafter, message 2) including a first uplink grant and a second uplink grant, as a response to the message 1,
- perform an initial transmission of a message 3 using the first uplink grant,
- start a timer at a time when the initial transmission of a message 3 is performed, and
- perform a retransmission of the message 3 using the second uplink grant when the timer expires.
Dependencies are inferred from the claim text.