초록 ▼

The present invention relates to methods and means for determining handovers in a cellular radio communication system. Power-budgets for a serving and a target cell are calculated (301,302). A ranking value for both cells is determined from the power-budgets (306,307). A new ranking value for the ta

The present invention relates to methods and means for determining handovers in a cellular radio communication system. Power-budgets for a serving and a target cell are calculated (301,302). A ranking value for both cells is determined from the power-budgets (306,307). A new ranking value for the target cell is calculated (309) by adding a specific adjustment value, dependent on the BER in the serving cell and the target cell and derived from a communication-quality table, to the ranking value of the target cell. A handover is performed if the new ranking value exceeds the ranking value of the serving cell.

대표청구항 ▼

1. A method in a radio communication system for determining a handover of a connection (C1) established between a radio unit (100) and a first base station (101) to a second base station (105), where said first base station (101) is serving a serving cell (102) and said second base station (105) is

1. A method in a radio communication system for determining a handover of a connection (C1) established between a radio unit (100) and a first base station (101) to a second base station (105), where said first base station (101) is serving a serving cell (102) and said second base station (105) is serving a neighbouring cell (103), said method comprising:a) measuring (301) of a first received signal strength (RSSS) from said first base station (101); b) measuring (302) of a second received signal strength (RSSNx) from said second base station (105); c) measuring (303) at least a first (RXQUALS(RU)) and a second (RXQUALS(BTS)) communication-quality value in said serving cell (102); characterised in said method further comprising: d) calculating (306) a first power budget (pdgtS) for said serving cell (102) from said first received signal strength (RSSS); e) calculating (307) a second power budget (pbgtNx) for said neighbouring cell (103) from said second received signal strength (RSSNx); f) determining (306, 307) a first ranking value (RANKS) for said serving cell (102) based on said first power budget (pdgtS) and a second ranking value (RANKNx) for said neighbouring cell (103) based on said second power budget (pbgtNx); g) calculating (309) a new ranking value (RANKNx(new)) for said neighbouring cell (103) from said second ranking value (RANKNx), wherein said new ranking value (RANKNx(new)) is calculated (309) by adding a communication-quality adjustment value (RxQualX(Adj)) to said second ranking value (RANKNx); h) determining (310) if said new ranking value (RANKNx(new)) exceeds said first ranking value (RANKS); if so, perform a handover (312) of said connection (C1) from said first base station (101) to said second base station (105).