Method of performing uplink synchronization in random
First Claim
1. A method of performing a contention based random access procedure by a mobile communication terminal in communication with a base station, the method comprising:
- transmitting a random access preamble message to the base station;
receiving a random access response from the base station, the random access response including a timing advance command;
determining a status of a mobile communication terminal time alignment timer; and
whether contention resolution is successful or not, ignoring the timing advance command if the mobile communication terminal time alignment timer is determined to be running in the determining step.
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Accused Products
Abstract
A method and device for performing a contention based random access procedure by a mobile communication terminal in communication with a base station. The method according to an embodiment includes transmitting a random access preamble message to the base station; receiving a random access response from the base station, the random access response including a timing advance command; determining a status of a mobile communication terminal time alignment timer; and ignoring the timing advance command if the mobile communication terminal time alignment timer is determined to be running in the determining step.
17 Citations
20 Claims
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1. A method of performing a contention based random access procedure by a mobile communication terminal in communication with a base station, the method comprising:
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transmitting a random access preamble message to the base station; receiving a random access response from the base station, the random access response including a timing advance command; determining a status of a mobile communication terminal time alignment timer; and whether contention resolution is successful or not, ignoring the timing advance command if the mobile communication terminal time alignment timer is determined to be running in the determining step. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A mobile communication terminal configured to perform a contention based random access procedure with a base station, the mobile terminal comprising:
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a radio frequency (RF) unit; and a processor operatively configured to; transmit a random access preamble to the base station; receive from the base station a random access response as a response to the random access preamble, the random access response including a timing advance command; determine a status of a mobile communication terminal time alignment timer; and whether contention resolution is successful or not, ignoring the timing advance command if the mobile communication terminal time alignment timer is determined to be running in the determining step. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification