Data transmission method and user equipment for the same

A user equipment comprising:

• a reception module associated with a physical layer that receives over a physical channel an uplink grant (UL Grant) from a base station;
• a transmission module also associated with the physical layer that transmits data to the base station using the UL Grant;
• a message 3 (Msg3) buffer that stores UL data to be transmitted in a random access procedure;
• and
• a Hybrid Automatic Repeat Request (HARD) entity that:
• determines whether there is data stored in the Msg3 buffer and whether the UL Grant was received on the random access response message, and only when there is data stored in the Msg3 buffer and the UL Grant was received on the random access response message:
• acquires the data stored in the Msg3 buffer, and
• controls the transmission module to transmit the data stored in the Msg3 buffer to the base station using the UL Grant received by the reception module on the random access response message.

A system for transmitting data by a user equipment through an uplink comprising:

• means for receiving an uplink grant (UL Grant) from a base station;
• means for determining whether there is data stored in a message 3 (Msg3) buffer and whether the UL Grant was received on a random access response message;
• and
• means for transmitting, only when there is data stored in the Msg3 buffer and when the UL Grant was received on the random access response message, the data stored in the Msg3 buffer to the base station using the UL Grant received on the random access response message.

A user equipment comprising:

• means for receiving over a physical channel an uplink grant (UL Grant) from a base station;
• means for transmitting data to the base station using the UL Grant;
• means for storing UL data to be transmitted in a random access procedure;
• and
• means for determining whether there is data stored in the means for storing and whether the UL Grant was received on the random access response message, and only when there is data stored in the means for storing and the UL Grant was received on the random access response message:
• means for acquiring the data stored in the means for storing, and
• means for transmitting the data stored in the means for storing to the base station using the UL Grant received on the random access response message.

A mobile LTE communications system comprising:

• a reception module associated with a physical layer that receives over a physical channel an uplink grant (UL Grant) from a base station;
• a transmission module also associated with the physical layer that transmits data to the base station using the UL Grant;
• a message 3 (Msg3) buffer that stores UL data to be transmitted in a random access procedure;
• and
• a Hybrid Automatic Repeat Request (HARM) entity that:
• determines whether there is data stored in the Msg3 buffer and whether the UL Grant was received on the random access response message, and only when there is data stored in the Msg3 buffer and the UL Grant was received on the random access response message:
• acquires the data stored in the Msg3 buffer, and
• controls the transmission module to transmit the data stored in the Msg3 buffer to the base station using the UL Grant received by the reception module on the random access response message.

A method of transmitting data by a user equipment through an uplink to solve a problem which may occur when data stored in a message 3 (Msg3) buffer is transmitted according to a reception mode of an Uplink (UL) Grant, the method comprising:

• receiving an uplink grant (UL Grant) from a base station;
• determining whether there is data stored in the message 3 (Msg3) buffer and whether the UL Grant was received on a random access response message;
• and
• transmitting, only when there is data stored in the Msg3 buffer and when the UL Grant was received on the random access response message, the data stored in the Msg3 buffer to the base station using the UL Grant received on the random access response message.