Method of performing random access procedure in wireless communication system
A method includes transmitting a random access preamble, receiving a random access response as a response of the random access preamble, wherein the random access response comprises an uplink resource assignment and a request for transmission of a Channel Quality Indicator (CQI), and transmitting the CQI in the uplink resource assignment.
1. A method of performing a random access procedure in a wireless communication system, the method performed by a user equipment and comprising:
transmitting a random access preamble to a base station;
receiving a random access response grant from the base station in response to the random access preamble, wherein the random access response grant comprises an uplink resource assignment; and
transmitting, in response to the random access response grant, a scheduled message including a Channel Quality Indicator (CQI) to the base station via a Physical Uplink Shared Channel (PUSCH),
wherein the uplink resource assignment is used for scheduling of the PUSCH,
wherein the scheduled message and the CQI are transmitted via a same subframe, and
wherein the CQI is aperiodically transmitted to the base station.
2. The method of claim 1 , wherein the random access response grant is received on a Physical Downlink Shared Channel (PDSCH).
3. The method of claim 2 further comprising:
receiving control information via a Physical Downlink Control Channel (PDCCH);
verifying the control information by demasking a cyclic redundancy code (CRC) of the control information with a Random Access-Radio Network Temporary Identifier (RA-RNTI); and
identifying the location of the random access response grant in the PDSCH using the control information.
4. The method of claim 1 , wherein the CQI is mapped on a radio block which is initially transmitted in a subframe.
5. In a wireless communication system, user equipment comprising:
a Radio Frequency (RF) unit for transmitting and receiving radio signals; and
a processor coupled with the RF unit and configured to:
transmit a random access preamble to a base station;
receive a random access response grant from the base station in response to the random access preamble, wherein the random access response grant comprises an uplink resource assignment; and
transmit, in response to the random access response grant, a scheduled message including a Channel Quality Indicator (CQI) to the base station via a Physical Uplink Shared Channel (PUSCH),
wherein the uplink resource assignment is used for scheduling of the PUSCH,
wherein the scheduled message and the CQI are transmitted via a same subframe, and
wherein the CQI is aperiodically transmitted to the base station.
6. The user equipment of claim 5 , wherein the random access response grant is received on a Physical Downlink Shared Control Channel (PDSCH).
7. The user equipment of claim 5 , wherein the CQI is mapped on a radio block which is initially transmitted in a subframe.
8. The user equipment of claim 5 , wherein the random access preamble is a dedicated random access preamble.