How Basic System Architecture for Location Aided Handover

Taking into account the algorithm LAH we have designed a LAH logical diagram, based on a general cellular handover architecture. The flowchart in Figure below is a general description of the procedures that have to be taken into account for combining the location information with the handover measurements to avoid the undesirable effects of current algorithm. For the study and enhancement of the handover performance, simulation tools will be used and implemented.

lac handover

Initially critical areas are identified, based on the values of the MGIS. In case the LS is capable to provide accurate positioning of all users, then the LAH algorithms will be triggered either if the user enters a critical pre-defined area, or if the measurement report shows lack of coverage.

In case of a less capable LS, the LAH algorithms will be triggered when thresholds are reached. In that case the user will be localized “on demand”, in a way to get information about the user’s movement direction and speed. The combination of this information with the area characteristics from the MGIS (drop-call rate, handover statistics, etc) can lead to safe and intelligent handover executions, decreasing the handover failure probability and the signaling traffic.

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