Method and apparatus for performing Discontinuous Reception operation by connected mode User Equipment in a mobile communication system
Methods and apparatuses are provided for establishing time alignment by a terminal in a mobile communication system. Information for identifying a preamble on a downlink control channel is received from a base station. The preamble is transmitted based on the information for identifying the preamble. A response message including timing adjustment information, information for a channel quality indicator (CQI) request, and an identifier of the terminal is received on a downlink shared channel from the base station. The time alignment is established based on the timing adjustment information included in the response message. A CQI is transmitted based on the information for the CQI request.
1. A method for establishing time alignment by a terminal in a mobile communication system, the method comprising:
receiving information for identifying a preamble on a downlink control channel from a base station;
transmitting the preamble based on the information for identifying the preamble;
receiving a response message including timing adjustment information, information for a channel quality indicator (CQI) request, and an identifier of the terminal on a downlink shared channel from the base station;
establishing the time alignment based on the timing adjustment information included in the response message; and
transmitting a CQI based on the information for the CQI request.
2. The method of claim 1 , wherein the information for the CQI request comprises information on a resource assignment for the CQI.
3. The method of claim 1 , further comprising:
receiving downlink data from the base station after establishing the time alignment.
4. The method of claim 1 , wherein the response message further comprises an uplink grant.
5. An apparatus for establishing time alignment by a terminal in a mobile communication system, the apparatus comprising:
a transceiver for receiving and transmitting a signal; and
a controller operable to receive information for identifying a preamble on a downlink control channel from a base station, to transmit the preamble based on the information for identifying the preamble, to receive a response message including timing adjustment information, information for a channel quality indicator (CQI) request, and an identifier of the terminal on a downlink shared channel from the base station, to establish the time alignment based on the timing adjustment information included in the response message, and to transmit a CQI based on the information for the CQI request.
6. The apparatus of claim 5 , wherein the information for the CQI request comprises information on a resource assignment for the CQI.
7. The apparatus of claim 5 , wherein the controller controls to receive downlink data from the base station after establishing the time alignment.
8. The apparatus of claim 5 , wherein the response message further comprises an uplink grant.
9. A method for establishing time alignment by a base station in a mobile communication system, the method comprising:
transmitting information for identifying a preamble on a downlink control channel to a terminal;
receiving the preamble from the terminal;
transmitting a response message including timing adjustment information for establishing the time alignment, information for a channel quality indicator (CQI) request, and an identifier of the terminal on a downlink shared channel to the terminal; and
receiving a CQI based on the information for the CQI request.
10. The method of claim 9 , wherein the information for the CQI request comprises information on a resource assignment for the CQI.
11. The method of claim 9 , further comprising:
transmitting downlink data to the terminal after receiving the CQI.
12. The method of claim 9 , wherein the response message further comprises an uplink grant.
13. An apparatus for establishing time alignment by a base station in a mobile communication system, the apparatus comprising:
a transceiver for transmitting and receiving a signal; and
a controller operable to transmit information for identifying a preamble on a downlink control channel to a terminal, to receive the preamble from the terminal, to transmit a response message including timing adjustment information for establishing the time alignment, information for a channel quality indicator (CQI) request, and an identifier of the terminal on a downlink shared channel to the terminal, and to receive a CQI based on the information for the CQI request.
14. The apparatus of claim 13 , wherein the information for the CQI request comprises information on a resource assignment for the CQI.
15. The apparatus of claim 13 , wherein the controller controls to transmit downlink data to the terminal after receiving the CQI.
16. The apparatus of claim 13 , wherein the response message further comprises an uplink grant.