METHOD OF PERFORMING UPLINK SYNCHRONIZATION IN RANDOM ACCESS PROCEDURE
First Claim
1. A method of performing a contention based random access procedure by a mobile communication terminal in communication with a base station, 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
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.
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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, 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 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)
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10. A mobile communication terminal configured to perform a contention based random access procedure with a base station, the mobile communication terminal comprising:
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a display; a transceiver; and a processor operatively connected to the display and transceiver, the processor including a time alignment timer, the processor configured to transmit a random access preamble message to the base station, receive a random access response from the base station, the random access response including a timing advance command, determine a status of the time alignment timer, and ignore the timing advance command if the mobile communication terminal time alignment timer is determined to be running. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of performing a contention based random access procedure by a mobile communication terminal in communication with a base station, 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 if the mobile communication terminal time alignment timer is determined to be running in the determining step, ignoring the timing advance command, and transmitting a scheduled message to the base station in correspondence with the running mobile communication terminal time alignment timer. - View Dependent Claims (20)
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Specification