Telefonaktiebolaget Lm Ericsson (publ)

Paolo Guidotti

Walter Müller

Per Skillermark

Göran Rune

Anna Fallgren

The invention is directed towards determining whether a hard handover should be performed of a mobile station () in relation to a first group of cells () including a number of active cells () and handled by a first cell handling device () to a second group of cells () handled by a second cell handling device (), when the cell handling devices lack a direct communication link (lur). Either the first cell handling device or the mobile station obtains measurements of link quality between the mobile station and cells of the groups, determines a first and second total quality factor for the groups, performs an evaluation of a preferred group involving comparing the first total quality factor with the second quality factor and initiates a handover from the first group to the second group if the second group is preferred.

Network evaluated hard hardover using predictions

In the present invention, in a cellular communication system using frames () of communication resources in time and/or frequency domain, the communication resources () are divided into at least two regions (). A first region () has a higher reuse in time and/or frequency domain than a second region (). The first region is a hybrid region (), in which the communication resources individually are allocable for either uplink or downlink communication on a cell-to-cell basis. The second region is preferably a dedicated region (), in which all communication resources have either uplink or downlink allocation. A third region () is preferably also present, in which all communication resources are allocated in the opposite direction to the second region (). In preferred embodiments, the actual allocation of the hybrid region () is based on the traffic situation in each individual cell.

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Casalecchio, Italy

Paolo Guidotti