Method of transmitting data packets

A data transmission system comprising a transmitter and a receiver and means for transmitting data packets between the transmitter and the receiver,

• wherein the receiver is designed for sending a positive acknowledge message to the transmitter when a data packet is received free from errors,
• wherein the receiver is designed for sending a negative acknowledge message to the transmitter when a data packet is received with errors,
• wherein the receiver is designed for sending a repeat message to the transmitter for requesting a repeated transmission of a data packet if no repeated transmission of the relevant data packet takes place in spite of a negative acknowledge message sent by the receiver, and
• wherein the transmitter is designed for the repeated transmission of a data packet whenever the transmitter has received a negative acknowledge message or a repeat message.

A method of transmitting data packets between a transmitter and a receiver,

• wherein the receiver is designed for sending a positive acknowledge message to the transmitter when a data packet is received free from errors,
• wherein the receiver is designed for sending a negative acknowledge message to the transmitter when a data packet is received with errors,
• wherein the receiver is designed for sending a repeat message to the transmitter for requesting a repeated transmission of a data packet if no repeated transmission of the relevant data packet takes place in spite of a negative acknowledge message sent by the receiver, and
• wherein a first spreading code is provided for sending the positive and the negative acknowledge message and the repeat message, and
• wherein a second spreading code is provided for sending additional redundancy for the negative acknowledge message and/or the repeat message.