Method of transmitting and receiving radio access information in a wireless mobile communications system
In a wireless mobile communications system, a method of transmitting and receiving radio access information that allows a faster and an efficient way of establishing a radio connection between a terminal and a target base station while performing a handover for the terminal to a cell of the target base station. The network transmits in advance, the radio access information and the like, to the terminal so that the terminal can be connected with the target cell in a faster manner which minimizes the total time for the handover process.
1. A method of transmitting uplink data in a wireless communication system, the method comprising:
receiving in a terminal from a network, preamble information generated by the network, wherein the preamble information is received via dedicated signaling in downlink,
wherein the received preamble information is either a dedicated preamble or an index of the dedicated preamble, and wherein the preamble information is used for performing a random access channel (RACH) procedure, and
wherein the dedicated preamble is used for a specific terminal;
transmitting from the terminal to the network, the dedicated preamble on a random access channel (RACH) in uplink; uplink
receiving in the terminal, a random access response in response to the transmitted dedicated preamble, wherein the random access response includes at least one of time information for a handover operation, an uplink grant for the handover operation, time information for a downlink data arrival, or a random access preamble identifier; and
transmitting the uplink data to the network using the uplink grant included in the random access response.
2. The method of claim 1 , wherein the preamble information is a non-contention collision avoidance random access preamble assigned to the specific terminal by the network.
3. The method of claim 1 , wherein the preamble information is signaled via a handover command generated by a target base station.
4. The method of claim 1 , wherein the preamble information is signaled via a physical downlink control channel (PDCCH).
5. The method of claim 1 , wherein the random access response is received on a downlink shared channel (DL-SCH).
6. A mobile terminal for transmitting uplink data in a wireless communication system, the mobile terminal comprising:
a transceiver configured to transmit or receive the uplink data;
a memory configured to store the uplink data transmitted or received via the transceiver or from an external source; and
a processor cooperating with the transceiver and the memory, the processor configured to:
receive, from a network, preamble information generated by the network, wherein the preamble information is received via dedicated signaling in downlink, wherein the preamble information is used for performing a random access channel (RACH) procedure, wherein the received preamble information is either a dedicated preamble or an index of the dedicated preamble, and wherein the dedicated preamble is used for a specific terminal;
transmit, to the network, the dedicated preamble on a random access channel (RACH) in uplink;
receive a random access response in response to the transmitted dedicated preamble, wherein the random access response includes at least one of time information for a handover operation, an uplink grant for the handover operation, time information for a downlink data arrival, or a random access preamble identifier; and
transmit the uplink data to the network using the uplink grant included in the random access response.
7. The mobile terminal of claim 6 , wherein the preamble information is a non-contention collision avoidance random access preamble assigned to the specific terminal by the network.
8. The mobile terminal of claim 6 , wherein the preamble information is signaled via a handover command generated by a target base station.
9. The mobile terminal of claim 6 , wherein the preamble information is signaled via a physical downlink control channel (PDCCH).
10. The mobile terminal of claim 6 , wherein the random access response is received on a downlink shared channel (DL-SCH).