Layer 1 and layer 3 filtering of a received signal where a portion of the layer 3 filtering is based on a calculated gradient change

摘要

A wireless communication unit capable of moving between communication cells is described. The wireless communication unit comprises: a receiver arranged to receive a wireless signal; and a controller operably coupled to the receiver and comprising a layer 1 filtering module and a layer 3 filtering module. The controller is arranged to implement on the received wireless signal both: layer 1 filtering by the layer 1 filtering module at a physical layer; and layer 3 filtering by the layer 3 filtering module at a radio resource control layer. The layer 3 filtering module is operably coupled to a gradient calculation module arranged to calculate a gradient change that is representative of at least one of: a rate of change of received signal strength with a serving cell; a rate of received signal strength difference between a neighbour cell and a serving cell, such that at least a portion of layer 3 filtering of the received wireless signal is based on the calculated gradient change.