Uplink synchronization in multiple carrier system
AssigneeLG Electronics Inc.
InventorsKi Seon Ryu, Eun Jong Lee, Young Soo Yuk, Yong Ho Kim
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Abstract
A method and apparatus of uplink synchronization in a multiple carrier system is provided. After establishing Uplink synchronization for a primary carrier, a secondary carrier based on activation information via the primary carrier is activated. A periodic ranging via the secondary carrier is performed to adjust uplink synchronization for the secondary carrier.
Claims15
A method of uplink synchronization in a multiple carrier system, performed by a mobile station, the method comprising:
- establishing uplink synchronization for a primary carrier;
- activating a secondary carrier based on activation information via the primary carrier;
- and
- performing a periodic ranging via the secondary carrier to adjust uplink synchronization for the secondary carrier.
A mobile station in multiple carrier system comprising:
- a radio frequency (RF) unit to transmit or receive a radio signal;
- and
- a processor operatively connected with the RF unit and configured to:
- establish uplink synchronization for a primary carrier;
- activate a secondary carrier based on activation information via the primary carrier;
- and
- perform a periodic ranging via the secondary carrier to adjust uplink synchronization for the secondary carrier.
A method of uplink synchronization in a multiple carrier system, performed by a mobile station, the method comprising:
- transmitting a first ranging code through a first carrier to a base station;
- adjusting an uplink transmission parameter of the first carrier based on a time-frequency offset included in a first ranging response received as a response of the first ranging code;
- activating a secondary carrier based on activation information through the first carrier;
- transmitting a second ranging code through the second carrier to the base station;
- and
- adjusting an uplink transmission parameter of the second carrier by applying a time-frequency offset included in a second ranging response received a response of the second ranging code.
Dependencies are inferred from the claim text.