Patent ID: 8989087
Filing Date: 2015-03-24
Classification: H04W

Abstract:
1. A method for managing radio access in a communication system, the method comprising: sending, from a first radio access network to a second radio access network, a radio access technology resource aggregation request concerning communication with a user equipment connected to a source radio base station of a source radio access network, wherein said source radio access network is one of said first radio access network and said second radio access network, said first radio access network operates with a first radio access technology, and said second radio access network operates with a second radio access technology different from said first radio access technology; receiving, in said first radio access network from said second radio access network, a radio access technology resource aggregation request response; reserving radio resources of a target radio base station in a target radio access network, said target radio access network being the radio access network, of said first radio access network and said second radio access network, to which said user equipment is not connected, said source radio base station and said target radio base station having at least partly overlapping coverage areas; sending, from said target radio access network to said source radio access network, a report of said reserved radio resources; selecting one of said first radio access network and said second radio access network as a primary radio access network and the other one of said first radio access network and said second radio access network a secondary radio access network, wherein said primary radio access network is said target radio access network; initiating, by said primary radio access network, an inter-cell handover from a radio base station, to which said user equipment is connected, of said primary radio access network to another radio base station having the same radio access technology as said primary radio access network, wherein said initiating of said inter-cell handover comprises information indicating that a radio access technology resource aggregation is used; and initiating, by said secondary radio access network, an inter-cell handover from a radio base station, to which said user equipment is connected, of said secondary radio access network to another radio base station having the same radio access technology as said secondary radio access network, wherein said initiating of said inter-cell handover comprises information indicating that a radio access technology resource aggregation is used and wherein said inter-cell handover of said secondary radio access network being performed in parallel to said inter-cell handover of said primary radio access network.