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Methods and apparatus for facilitating robust forward handover in long term evolution (LTE) communication systems

  • US 9,131,410 B2
  • Filed: 09/06/2012
  • Issued: 09/08/2015
  • Est. Priority Date: 04/09/2010
  • Status: Active Grant
First Claim
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1. A method for facilitating a forward handover in a communications system, comprising:

  • receiving, at a target base station, a first message from a user terminal indicative of a Random Access Channel (RACH) procedure to initiate access to the target base station;

    sending, from the target base station, a second message to the user terminal to initiate access to the target base station;

    receiving, at the target base station, a third message comprising a connection reestablishment request including first identity information from the user terminal for retrieval of user context information stored at a source base station;

    initiating, at the target base station, retrieval of the user context information from the source base station;

    sending, from the target base station, in response to failure to retrieve the user context information, a fourth message to the user terminal informing the user terminal to continue the forward handover without performing another RACH procedure; and

    receiving, at the target base station, a connection request message from the user terminal.

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