| 摘要 |
A CALL ADMISSION CONTROL METHOD WHICH OPERATES UNDER A VARIETY OF CONDITIONS. WHEN ONLY COMMON MEASUREMENTS ARE AVAILABLE, THE CALL ADMISSION CONTROL FUNCTION AT THE CRNC WILL ACCEPT OR REJECT A REQUEST BASED ON: COMMON MEASUREMENTS OF THE TARGET CELL AND NEIGHBORING CELLS; ESTIMATED COMMON MEASUREMENTS AFTER ADMISSION; AND THE MEASURE OF LOAD OF THE TARGET CELL AND NEIGHBORING CELLS. WHEN NO MEASUREMENTS ARE AVAILABLE, THE CALL ADMISSION CONTROL FUNCTION AT THE CRNC CAN ACCEPT OR REJECT A REQUEST BASED ON ESTIMATED LOAD OF THE TARGET CELL AND NEIGHBORING CELLS, INSTEAD OF RELYING ON UE/UTRAN MEASUREMENTS. THE LOAD MAY BE ESTIMATED USING THE FOLLOWING INFORMATION: 1) REQUIRED SIGNAL TO NOISE RATIO (SIR) OF THE RADIO LINK SETUP/RECONFIGURATION REQUEST; AND 2) REQUIRED SIR OF EXISTING CCTRCHS IN THE TARGET CELL AND NEIGHBORING CELLS. FINALLY, THE CALL ADMISSION CONTROL FUNCTION AT CRNC CAN ACCEPT OR REJECT A REQUEST BASED ON ESTIMATED OUTAGE PROBABILITY OF THE TARGET CELL AND NEIGHBORING CELLS BASED ON ASSUMPTION OF TIME-VARIANT SIR. ONE EMBODIMENT FOR ESTIMATING THE OUTAGE PROBABILITY IS TO USE THE FOLLOWING INFORMATION: 1) REQUIRED SIGNAL TO NOISE RATIO (SIR) AND SIR RANGE OF THE RADIO LINK SETUP/RECONFIGURATION REQUEST; 2) REQUIRED SIR AND SIR RANGE OF EXISTING CCTRCHS IN THE TARGET CELL AND NEIGHBORING CELLS; AND 3) OUTAGE PROBABILITY CAN BE DEFINED AS THE PROBABILITY THAT THE INSTANTANEOUS LOAD IN A TIME SLOT EXCEEDS A MAXIMUM ALLOWED VALUE.FIGURE 1
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