Transmission link optimization
First Claim
1. A method for triggering the optimization of a call-related link between a controller controlling the radio interface of a mobile communication system and its mobile switching centre in a mobile communication system in which a mobile station can roam from one cell to another within the area of the system, in which methoda call-related link is created between the first controller serving the location cell of a mobile station and its mobile switching centre to establish a call-related connection between the mobile station and the mobile switching centre, one or more handovers from the originating cell to a target cell are performed during the roaming of the mobile station, which cells can be located in the service areas of different controllers, in which case the handover takes place between controllers, history data concerning handovers of the mobile station is maintained, at least one condition, based on the history data, triggering the optimization of the call-related link is set, in response to updating the history data, a check is made to find out, if the condition is fulfilled, and if the condition is fulfilled, the link optimization is triggered.
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Abstract
A method, a mobile communication system and a controller controlling the use of the radio resources of the mobile communication system, by means of which it is decided when the optimization of the lu link between a mobile switching centre and the controller is triggered. In the method, history data is maintained (204, 205, 206, 214) on the roaming of the mobile station, at least on condition triggering the link optimization is set based on the history data, a check is made in response to updating the history data to see if the condition is fulfilled (207), and if the condition is fulfilled, the link optimization is triggered (208,209,210).
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Citations
17 Claims
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1. A method for triggering the optimization of a call-related link between a controller controlling the radio interface of a mobile communication system and its mobile switching centre in a mobile communication system in which a mobile station can roam from one cell to another within the area of the system, in which method
a call-related link is created between the first controller serving the location cell of a mobile station and its mobile switching centre to establish a call-related connection between the mobile station and the mobile switching centre, one or more handovers from the originating cell to a target cell are performed during the roaming of the mobile station, which cells can be located in the service areas of different controllers, in which case the handover takes place between controllers, history data concerning handovers of the mobile station is maintained, at least one condition, based on the history data, triggering the optimization of the call-related link is set, in response to updating the history data, a check is made to find out, if the condition is fulfilled, and if the condition is fulfilled, the link optimization is triggered.
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10. A mobile communication system comprising
at least one mobile switching centre, at least two controllers to control the use of the air interface of the mobile communication system in their own areas, at least one mobile station which can roam in the mobile communication system from the service area of the first controller to the service area of the second controller during a call, and which system is adapted to perform at least one handover in the air interface as a result of roaming, and to connect a call between the mobile station and the mobile switching centre by means of a call-specific link between a controller serving the location cell of the mobile station and its mobile switching centre, wherein the mobile communication system further comprises memory means for storing history data concerning handovers of the mobile station, comparison means for comparing the history data with at least one predefined condition, and control means responsive to the comparison means for triggering the optimization of the call-related link.
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14. A controller controlling the use of the radio channels in a mobile communication system, which controller is connected to a mobile switching centre of the mobile communication system and to another corresponding controller, which controller is adapted to optimize a call-related link between the controller and the mobile switching centre,
to compare history data concerning handovers of the mobile station with at least one predefined condition, and to generate the optimization of the link when the condition is fulfilled.
Specification