Method for operating a fast random access procedure in a wireless communication system and a device therefor
First Claim
1. A method for performing a Random Access Procedure by a User Equipment (UE) operating in a wireless communication system, the method comprising:
- transmitting a Random Access Preamble (RAP) to a base station;
starting a Random Access Response (RAR) reception procedure;
receiving, from the base station, a RAR including an indicator indicating early termination of the RAR reception procedure and a RAP identifier (ID) corresponding to the transmitted RAP;
when a predefined condition for early termination is met;
terminating the RAR reception procedure; and
proceeding to a selection of a Random Access Resource including transmission of a RAP within a RAR window; and
when the predefined condition for early termination is not met;
keeping performing the RAR reception procedure; and
transmitting a Msg3 to the base station after the RAR window;
wherein the predefined condition for early termination includes that a number of RAP transmissions is less than a threshold.
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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 operating fast random access procedure in a wireless communication system, the method comprising: starting a Random Access Response (RAR) reception procedure by transmitting a Random Access Preamble (RAP) to an e-NodeB (eNB); receiving, from the eNB, an indicator indicating that the UE check a condition for whether the UE stops the RAR reception procedure or not, checking whether the condition is met or not; and stopping RAR reception procedure if the condition is met.
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Citations
8 Claims
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1. A method for performing a Random Access Procedure by a User Equipment (UE) operating in a wireless communication system, the method comprising:
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transmitting a Random Access Preamble (RAP) to a base station; starting a Random Access Response (RAR) reception procedure; receiving, from the base station, a RAR including an indicator indicating early termination of the RAR reception procedure and a RAP identifier (ID) corresponding to the transmitted RAP; when a predefined condition for early termination is met; terminating the RAR reception procedure; and proceeding to a selection of a Random Access Resource including transmission of a RAP within a RAR window; and when the predefined condition for early termination is not met; keeping performing the RAR reception procedure; and transmitting a Msg3 to the base station after the RAR window; wherein the predefined condition for early termination includes that a number of RAP transmissions is less than a threshold. - View Dependent Claims (2, 3, 4)
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5. A User Equipment (UE) operating in a wireless communication system, the UE comprising:
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a Radio Frequency (RF) module; and
a processor configured to control the RF module, wherein the processor is configured;to transmit a Random Access Preamble (RAP) to a base station; to start a Random Access Response (RAR) reception procedure; to receive, from the base station, a RAR including an indicator indicating early termination of the RAR reception procedure and a RAP identifier (ID) corresponding to the transmitted RAP; to check whether the condition is met or not; and when a predefined condition for early termination is met; to terminate the RAR reception procedure if the condition is met; and to proceed to a selection of a Random Access Resource including transmission of a RAP within a RAR window; and
when the predefined condition for early termination is not met;to keep performing the RAR reception procedure; and
to transmit a Msg3 to the base station after the RAR window;wherein the predefined condition for early termination includes that a number of RAP transmissions is less than a threshold. - View Dependent Claims (6, 7, 8)
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Specification