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Dynamic adjustment of cell reselection parameters for a wireless communication device

  • US 9,241,289 B1
  • Filed: 10/23/2013
  • Issued: 01/19/2016
  • Est. Priority Date: 10/23/2013
  • Status: Active Grant
First Claim
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1. A method of operating a wireless communication device to facilitate cell reselection, the method comprising:

  • achieving downlink timing synchronization with a cell associated with a wireless access node based on information broadcast by the wireless access node over a synchronization signal;

    performing a number of attempts to achieve uplink timing synchronization with the cell, wherein each of the attempts includes transmitting a preamble identifier over a random access channel to the wireless access node and waiting a time period to receive a positive acknowledgement;

    if the number of attempts to achieve the uplink timing synchronization with the cell exceeds a threshold amount without receiving the positive acknowledgement, applying an offset to cell reselection parameters to generate modified cell reselection parameters;

    responsive to the modified cell reselection parameters satisfying cell reselection criteria, performing both intra-frequency and inter-frequency measurements for potential cell reselection; and

    selecting a different cell for potential synchronization based on the intra-frequency and the inter-frequency measurements.

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