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Seamless handover in a cordless TDMA system

  • US 5,822,313 A
  • Filed: 05/24/1996
  • Issued: 10/13/1998
  • Est. Priority Date: 05/24/1996
  • Status: Expired due to Term
First Claim
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1. A device for use in a TDMA communication system, said system including a plurality of base stations for transmitting bursts of data within time slots to handsets and receiving bursts of data within time slots from said handsets, said slots being arranged in frames, said device comprising:

  • a means for determining whether a handover operation is to be commenced for transferring communication support for a cordless handset from an original base station to a handover base station in a TDMA system;

    a transmit buffer for storing data to be transmitted;

    a first receive buffer for receiving data from a first burst;

    a second receive buffer for receiving data from a second burst;

    a switch connected to said first receive buffer and said second receive buffer;

    a decoder connected to said switch for receiving data within said first receive buffer or said second receive buffer, depending on a position of said switch;

    a first addressing means for addressing locations in said transmit buffer for transmitting said data in said transmit buffer in an original slot transmit time and in a handover slot transmit time within a single frame;

    a second addressing means for addressing locations in said first receive buffer at particular times for storing data received in an original slot receive time and for addressing the same locations at said particular times in said second receive buffer for storing data received in a handover slot receive time; and

    a control circuit for detecting whether a handover operation should be completed and, upon detecting that said handover operation should be completed, controlling said switch to route data in said second receive buffer to said decoder for further processing.

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