Stall avoidance schemes using HARQ process receiving status

  • US 20030147348A1
  • Filed: 01/31/2003
  • Published: 08/07/2003
  • Est. Priority Date: 02/01/2002
  • Status: Active Grant
First Claim
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1. A method to avoid the stall of data blocks in-sequence delivery of the reordering buffers at the receiver in a High Speed Downlink Packet Access (HSDPA) of a wireless communication system, where the transmitter assigns a Transmission Sequence Number (TSN) to each sending data block sequentially, wherein the method comprises the steps of:

  • at the receiver;

    having at least one active HARQ process allocated for an HARQ entity where n is equal to the number of the active HARQ processes;

    receiving a plurality of data blocks from the transmitter through the active HARQ processes;

    determining and tracking the receiving status of each HARQ process;

    if the receiving statuses of the HARQ processes satisfy one of the predetermined conditions, performing the following steps a and b;

    a. discarding the selected missing gaps of the selected reordering buffers; and

    b. delivering all stored data blocks with TSN below the discarded missing gaps and all stored in-sequence data blocks with TSN above the discarded missing gaps in all reordering buffers to upper layer.

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