User equipment and methods for handover enhancement using scaled time-to-trigger and time-of-stay

1. A method performed by user equipment (UE) for handover initiation comprising:

measuring a reference signal received quality (RSRQ) of a serving cell;

scaling a time-to-trigger (TTT) based on at least one of the measured RSRQ and a time-of-stay in the serving cell; and

sending a measurement report after expiration of the scaled TTT,

wherein when the measured RSRQ is below a predetermined value, scaling the TTT comprises scaling down the TTT to a shorter TTT, and

wherein when the measured RSRQ is greater than or equal to the predetermined value, the method includes determining a time-of-stay in the serving cell and scaling down the TTT when the time-of-stay is greater than a predetermined value.

2. The method of claim 1 further comprising:

scaling up the TTT when the time-of-stay is less than or equal to the predetermined value; and

sending the measurement report after expiration of the scaled-up TTT.

3. An apparatus for User equipment (UE) arranged for handover initiation in a 3GPP LTE network, the apparatus comprising:

processing circuitry to measure a reference signal received quality (RSRQ) of a serving cell and scale a time-to-trigger (TTT) based on at least one of the measured RSRQ and a time-of-stay in the serving cell; and

physical-layer circuitry (PHY) to send a measurement report after expiration of the scaled TTT,

wherein the processing circuitry is further arranged to scale down the TTT to a shorter TTT when the measured RSRQ is below a predetermined value, and

wherein when the measured RSRQ is greater than or equal to the predetermined value, the processing circuitry is further arranged to determine a time-of-stay in the serving cell and scale down the TTT when the time-of-stay is greater than a predetermined value.

4. The apparatus of claim 2 wherein the processing circuitry is further arranged to scale up the TTT when the time-of-stay is less than or equal to the predetermined value, and

wherein the PHY is configured to send the measurement report after expiration of the scaled-up TTT.

5. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors to perform operations for handover initiation, the operations to configure the one or more processors to:

determine a measured reference signal received quality (RSRQ) of a serving cell;

scale a time-to-trigger (TTT) based on at least one of the measured RSRQ and a time-of-stay in the serving cell; and

provide instructions for sending a measurement report after expiration of the scaled TTT,

wherein when the measured RSRQ is below a predetermined value, the TTT is scaled down to a shorter TTT,

wherein when the measured RSRQ is greater than or equal to the predetermined value, a time-of-stay in the serving cell is determined and the TTT is scaled down when the time-of-stay is greater than a predetermined value.