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Handover of device-to-device (D2D) user equipment (UE) devices using D2D subframes with cell identifiers

  • US 9,992,783 B2
  • Filed: 12/18/2014
  • Issued: 06/05/2018
  • Est. Priority Date: 12/20/2013
  • Status: Active Grant
First Claim
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1. A method performed at a device-to-device (D2D) user equipment (UE) device, the method comprising:

  • communicating with another D2D UE device using D2D communication while the D2D UE device and the another D2D UE device are located within a first cell provided by a first base station;

    transmitting a D2D subframe to the another D2D UE device after a handover from the first cell to a second cell is complete, the D2D subframe conveying a cell identifier identifying the second cell;

    transmitting a D2D request to a second base station providing the second cell;

    receiving, from the second base station, communication resource information identifying D2D communication resources; and

    continuing D2D communication with the another D2D UE device using the D2D communication resources.

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