Patent ID: 8903453
Filing Date: 2014-12-02
Classification: H04W

Abstract:
1. A method of controlling a radio network controller of a radio access network, wherein the radio network controller comprises a plurality of control plane controllers and a plurality of user plane controllers, the method comprising: implementing the plurality of user control plane controllers separate from said plurality of control plane controllers; logically subordinating each user plane controller to only one control plane controller; effecting transfer of status information between a user plane controller and a control plane controller other than the control plane controller to which the user plane controller is logically subordinate notwithstanding that the user plane controller is logically subordinate to another of said control plane controllers; operating said plurality of control plane controllers when a user equipment located in an area of a first radio base station having a radio link established between said first radio base station and a first user plane controller subordinate to one of said control plane controllers moves to an area of a second radio base station, said second radio base station belonging to a second user plane controller subordinate to another of said control plane controllers, to refer to this another control plane controller for the status information of said second user plane controller, and determining based on the status information of said second user plane controller that is received from this other control plane controller whether or not a radio link can be added at said second user plane controller.