Method for determining handover criterion in a cellular wireless communication system

A method in a network control entity for a cellular wireless communication system, comprising:

• defining, by a network control entity in the cellular wireless communication system, at least one handover control criterion parameter corresponding to at least one handover criterion;
• and
• providing, by the network control entity, said at least one handover control criterion parameter to a network entity in said cellular wireless communication system;
• wherein said at least one handover criterion is a handover trigger value;
• wherein said at least one handover control criterion parameter defines an allowed interval for said handover trigger value;
• and
• wherein said at least one handover control criterion parameter comprises at least one threshold value used to define said allowed interval;
• wherein said at least one handover control criterion parameter further comprises setting at least one threshold value used to define a maximum change rate of the handover trigger value, wherein the maximum change rate of the handover trigger value defines a maximum allowed frequency at which the handover trigger value is changed, and the handover trigger value is a cell specific offset that corresponds to a threshold at which a cell initializes a handover preparation procedure.

A network control entity device for a cellular wireless communication system, said network control entity device being configured to

• define at least one handover control criterion parameter corresponding to at least one handover criterion;
• and
• provide said at least one handover control criterion parameter to a network entity in said cellular wireless communication system;
• wherein said at least one handover criterion is a handover trigger value;
• wherein said at least one handover control criterion parameter defines an allowed interval for said handover trigger value;
• and
• wherein said at least one handover control criterion parameter comprises at least one threshold value used to define said allowed interval;
• wherein said at least one handover control criterion parameter further comprises setting at least one threshold value used to define a maximum change rate of the handover trigger value, wherein the maximum change rate of the handover trigger value defines a maximum allowed frequency at which the handover trigger value is changed, and the handover trigger value is a cell specific offset that corresponds to a threshold at which a cell initializes a handover preparation procedure.

A network entity device configured to process mobility parameters in a cellular wireless communication system, said network entity device being configured to:

• receive at least one handover control criterion parameter;
• and
• determine at least one handover criterion based on said at least one handover control criterion parameter;
• wherein said at least one handover criterion is a handover trigger value;
• wherein said at least one handover control criterion parameter defines an allowed interval for said handover trigger value;
• and
• wherein said at least one handover control criterion parameter comprises at least one threshold value used to define said allowed interval;
• wherein said at least one handover control criterion parameter further comprises setting at least one threshold value used to define a maximum change rate of the handover trigger value, wherein the maximum change rate of the handover trigger value defines a maximum allowed frequency at which the handover trigger value is changed, and the handover trigger value is a cell specific offset that corresponds to a threshold at which a cell initializes a handover preparation procedure.