Method and apparatus for controlling a transport format of a retransmission

  • US 7,783,949 B2
  • Filed: 03/10/2005
  • Issued: 08/24/2010
  • Est. Priority Date: 04/01/2004
  • Status: Active Grant
First Claim
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1. A method for controlling a transport format for retransmissions of data packets transmitted on uplink from a transmitting apparatus to a receiving apparatus via at least one uplink data channel using a synchronous hybrid automatic repeat request (HARQ) protocol and soft combining of received data, the method comprising:

  • transmitting an uplink data packet via the uplink data channel from the transmitting apparatus to the receiving apparatus,receiving a feedback message from the receiving apparatus at the transmitting apparatus, wherein the feedback message is transmitted via an acknowledgment channel and indicates whether the uplink data packet has been successfully received by the receiving apparatus,in case the uplink data packet has not been received successfully, receiving via a scheduling related control channel and in parallel to the feedback message a control message at the transmitting apparatus for the unsuccessfully received uplink data packet, wherein the control message indicates a transport format for a retransmission of the unsuccessfully received uplink data packet, andtransmitting the retransmission of the unsuccessfully received uplink data packet from the transmitting apparatus to the receiving apparatus according to the transport format indicated in the control message using a synchronous transmission timing based on the synchronous HARQ protocol.

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