| 摘要 |
<p>The invention relates to a method for performing a handover between sub-cells (122B, 122A) in a cellular radio network base station (100) applying dynamic channel allocation. The base station (100) comprises sub-cells (122A, 122B, 122C) each of which has an antenna unit (118A, 118B, 118C) with a fixed connection to the base station (100). The base station comprises transceivers (TRX1-TRXN) which are arranged to measure reception power from a radio connection (200) to a subscriber terminal (102). When the measured reception power drops below a predetermined limit, the reception power of a signal (224A) sent by the subscriber terminal (102) on the radio connection (200) will be measured in turn via antenna units (118C, 118A) of other (122C, 122A) than the serving sub-cell. A handover between the sub-cells (122B, 122A) is performed when an antenna unit (118A) providing better reception power is found. A switching field (116) of the base station (100) comprises switches (220) for combining signals (224b, 224A) sent on the radio connection (200) by the subscriber terminal (102) and received via the antenna unit (118B) of the serving sub-cell (122B) and the antenna unit (118A) of another sub-cell (122A), to generate a combined signal (230). The reception power of the combined signal (230) is measured and on the basis of a comparison of the measured recpetion powers of the combined signal (230) and the signal (224B) of the serving cell (122B), the control unit (114) concludes to which antenna unit (118A) of the other sub-cell (122A) a handover is to be made.</p> |
