Methods and arrangements for mobility management

A user equipment adapted for use in a cellular communications system, comprising:

• a maintaining unit for maintaining at least two sets of mobility trigger parameters, each set of mobility trigger parameters corresponding to a predetermined user equipment speed range;
• a speed range estimator adapted to determine a speed range of the user equipment by monitoring the number of times that cell changes are triggered by the at least two sets of mobility trigger parameters;
• and
• a mobility processor adapted to select, based on the determined speed range of the user equipment, at least one of the maintained sets of mobility trigger parameters to be used for performing mobility-based decision.

A method for mobility management in a network base station of a cellular communications system, wherein the network base station is acting as a serving base station of a user equipment, the method comprising:

• maintaining at least two sets of mobility trigger parameters, each set of mobility trigger parameters corresponding to a predetermined user equipment speed range;
• determining a speed range of the user equipment by monitoring the number of times that cell changes are triggered by the at least two sets of mobility trigger parameters;
• and
• selecting, based on the determined speed range of the user equipment, at least one of the maintained sets of mobility trigger parameters to be used for performing cell handover decisions.

A network base station adapted for use in a cellular communications system and for acting as a serving base station of a user equipment, comprising:

• a maintaining unit for maintaining at least two sets of mobility trigger parameters, each set of mobility trigger parameters corresponding to a predetermined user equipment speed range;
• a speed range estimator adapted to determine a speed range of the user equipment by monitoring the number of times that cell changes are triggered by the at least two sets of mobility trigger parameters;
• and
• a mobility processor adapted to select, based on the determined speed range of the user equipment, at least one of the maintained sets of mobility trigger parameters to be used for performing cell handover decisions.