Abstract: A method of transmitting data using hybrid automatic repeat request (HARQ) includes transmitting an uplink data, receiving an ACK signal corresponding to the uplink data, and keeping the uplink data in a HARQ buffer after receiving the ACK signal until an uplink grant is received, the uplink grant comprising information on uplink resource assignment. Data can be more reliably transmitted.

Abstract: A method of transmitting data using hybrid automatic repeat request (HARQ) includes transmitting an uplink data, receiving an ACK signal corresponding to the uplink data, and keeping the uplink data in a HARQ buffer after receiving the ACK signal until an uplink grant is received, the uplink grant comprising information on uplink resource assignment, Data can be more reliably transmitted.

Abstract: A method of transmitting data using hybrid automatic repeat request (HARQ) includes transmitting an uplink data, receiving an ACK signal corresponding to the uplink data, and keeping the uplink data in a HARQ buffer after receiving the ACK signal until an uplink grant is received, the uplink grant comprising information on uplink resource assignment. Data can be more reliably transmitted.

Abstract: A method for transmitting data using a hybrid automatic repeat request (HARQ) is provided. The method includes receiving scheduling information, the scheduling information comprising information regarding a radio resource; transmitting data by using the radio resource; and retransmitting the data or transmitting new data by reusing the radio resource if a received scheduling change indicator indicates that the radio resource is reused. The scheduling change indicator is control information different from the scheduling information. Resources can be effectively used by decreasing an amount of radio resources required for scheduling information.

Abstract: An apparatus and method for uplink transmission in a wireless communication system are provided. The method comprises detecting an expiry of a time alignment timer in a MAC (Medium Access Control) layer, the time alignment timer being used to control how long the UE is considered uplink time aligned, notifying a release of PUCCH (Physical Uplink Control Channel) resources from the MAC layer to a RRC (Radio Resource Control) layer when the expiry of the time alignment timer is detected and keeping a part of the PUCCH (Physical Uplink Control Channel) resources in the RRC layer.

Abstract: A method of transmitting data using hybrid automatic repeat request (HARQ) includes transmitting an uplink data, receiving an ACK signal corresponding to the uplink data, and keeping the uplink data in a HARQ buffer after receiving the ACK signal until an uplink grant is received, the uplink grant comprising information on uplink resource assignment. Data can be more reliably transmitted.

Abstract: A method for transmitting data using a hybrid automatic repeat request (HARQ) is provided. The method includes receiving scheduling information, the scheduling information comprising information regarding a radio resource; transmitting data by using the radio resource; and retransmitting the data or transmitting new data by reusing the radio resource if a received scheduling change indicator indicates that the radio resource is reused. The scheduling change indicator is control information different from the scheduling information. Resources can be effectively used by decreasing an amount of radio resources required for scheduling information.

Abstract: An apparatus and method for uplink transmission in a wireless communication system are provided. The method comprises detecting an expiry of a time alignment timer in a MAC (Medium Access Control) layer, the time alignment timer being used to control how long the UE is considered uplink time aligned, notifying a release of PUCCH (Physical Uplink Control Channel) resources from the MAC layer to a RRC (Radio Resource Control) layer when the expiry of the time alignment timer is detected and keeping a part of the PUCCH (Physical Uplink Control Channel) resources in the RRC layer.