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Mobile communication system and method for implementing handoff

  • US 7,389,110 B2
  • Filed: 10/28/2002
  • Issued: 06/17/2008
  • Est. Priority Date: 10/26/2001
  • Status: Expired due to Fees
First Claim
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1. A method for implementing a handoff for an MT (Mobile Terminal) in a mobile communication system in which at least two BSCs (Base Station Controllers) are connected to at least two BTSs (Base Transceiver Systems) through a RAN (Radio Access Network) having a planar structure, each of the BSCs controls at least one BTS, and each of the BTSs as a source BTS provides information about an anchor BSC that is serving a call to an MT at a call setup, comprising the steps of:

  • storing anchor BSC information received from a source BTS at a call setup;

    transmitting to a target BTS a first Handoff Request message including the anchor BSC information, a message header, a message trailer, a control field, and MT identification, when a handoff is requested; and

    processing a call through the target BTS upon receipt from the target BTS of a response signal; and

    transmitting, by the anchor BSC, a data to the target BTS, when the anchor BSC receives a second Handoff Request message including MT and BTS identiflcations, a message header, a message trailer, and a control field.

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