Abstract
PROBLEM TO BE SOLVED: To provide measurement for avoiding a wireless link failure which may occur, depending on the fact that an adjacent cell of WTRU (wireless transmission/reception uni) is a CSG (closed subscriber group) cell or includes a CSG cell.SOLUTION: WTRU determines the signal quality relating to a first frequency to be less than a threshold value, and triggers a measurement event indicating necessity of measurement on a network, makes measurement on a frequency layer designated for CSG cell, updates a CSG virtual active set to optimum CSG cells, and performs hand-over to the CSG cells, based on signal quality measurement.
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Technologies
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