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Method for providing error correction using selective automatic repeat requests in a packet-switched communication system

  • US 5,487,068 A
  • Filed: 07/29/1994
  • Issued: 01/23/1996
  • Est. Priority Date: 07/29/1994
  • Status: Expired due to Fees
First Claim
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1. A method for providing a contention-free access uplink channel for a subscriber unit for transmission of predetermined types of messages in a slotted communication system, comprising the steps of:

  • A) transmitting, by a base site, a plurality of downlink packets to a first subscriber unit, wherein a packet includes segments;

    B) utilizing, by the base site, subscriber unit control information to reserve a next time slot for automatic repeat request information from the first subscriber unit;

    C) transmitting, by the first subscriber unit, using the reserved time slot, information on the success/failure of received segments of a first packet of the plurality of packets;

    D) temporarily interrupting, by the base site, a packet currently being transmitted to retransmit segments of the first packet that have an error/errors; and

    E) recycling to step B until the entire first packet is successfully transmitted.

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