Method of Controlling Handover by User Equipment
AssigneeST-Ericsson SA
InventorSafouane Sfar
Life of this patent
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Abstract
The invention concerns a method of evaluating by a user equipment a need for handover between cells in a cellular network, comprising a step (S1) of estimating a risk (R) of making an ineffective handover, and when said estimated risk (R) is above a threshold (S), a step (S2) of changing the value of at least one handover trigger parameter so as to reduce, for given handover attractiveness parameters respectively received from cells, the future rate of handover to be made by user equipment.
Claims15
Method of a user equipment controlling handover between cells in a cellular network, comprising:
- a step of estimating a risk of an ineffective handover, and
- when said estimated risk is above a threshold, a step of changing a value of at least one handover trigger parameter to reduce a future risk of an ineffective handover by the user equipment.
Method of a user equipment controlling handover from a given present cell to a given target cell in a cellular network, comprising:
- a step of estimating a risk of an ineffective handover from said present cell to said target cell, and
- when said estimated risk is above a threshold, a step of changing a value of at least one handover trigger parameter to reduce a future risk of an ineffective handover by the user equipment.
An arrangement for a user equipment of a cellular network, comprising:
- a memory adapted to store at least one handover trigger parameter,
- an estimator adapted to estimate a risk of a failed handover and/or a risk of making a ping pong handover, and
- a processor adapted, when said estimated risk or at least one of said estimated risks is above a threshold, to trigger in said memory a change, preferably an increase, of a value of said stored handover trigger parameter.
Arrangement for a user equipment of a cellular network, comprising:
- a memory adapted to store a handover trigger parameter which is a Power Hysteresis,
- an estimator adapted to estimate a variation of a handover measurement parameter between said user equipment and the base station of at least a cell, and
- a processor adapted to trigger, in said memory, a change of the value of said Power Hysteresis, when said estimated variation is above a threshold.
Dependencies are inferred from the claim text.