METHOD AND APPARATUS FOR PERFORMING CONTENTION BASED RANDOM ACCESS PROCEDURE OVER CONTENTION FREE RANDOM ACCESS PROCEDURE IN WIRELESS COMMUNICATION SYSTEM
First Claim
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1. A method for performing, by a user equipment (UE), a random access procedure in a wireless communication system, the method comprising:
- performing a contention free random access procedure on a first frequency;
detecting a failure of the contention free random access procedure; and
performing a contention based random access procedure.
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Abstract
A method and apparatus for performing a random access procedure in a wireless communication system is provided. A user equipment (UE) performs a contention free random access procedure on a first frequency, detects a failure of the contention free random access procedure, and performs a contention based random access procedure. When the first frequency is occupied by other media as a result of listen-before-talk (LBT) operation, the contention based random access procedure may be performed on a second frequency.
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Citations
15 Claims
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1. A method for performing, by a user equipment (UE), a random access procedure in a wireless communication system, the method comprising:
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performing a contention free random access procedure on a first frequency; detecting a failure of the contention free random access procedure; and performing a contention based random access procedure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A user equipment (UE) in a wireless communication system, the UE comprising:
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a memory; a transceiver; and a processor coupled to the memory and the transceiver, wherein the processor is configured to; perform a contention free random access procedure on a first frequency; detect a failure of the contention free random access procedure; and perform a contention based random access procedure.
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Specification