UMTS Feature Description

OutlineFeature DescriptionFunction Introduction Related Measurement Downlink Power-Based Admission Control Uplink Interference-Based Admission Control Case Study DL Power Admission UL Interference Admission

Function IntroductionWhy to Perform Admission Control Avoid system overload, ensure system stability Access as many services as possible When to Perform Admission Control RRC, RAB setup, Handover, DRBCWhat to Perform in Admission Control Uplink interference Downlink power Channelization code resources CE resource

OutlineFeature DescriptionFunction Introduction Related Measurement Downlink Power-Based Admission Control Uplink Interference-Based Admission Control Case Study DL Power Admission UL Interference Admission

Related MeasurementUplink interference RTWP common measurement on lub interface Report period of RTWP: 2sUplink back noiseAutomatic back noise Measurement (BckNoiseAdjSwh) initial back noise (OriBckNoise) Downlink power TCP common measurement on lub interface Report period of RTWP: 2sPredict P (required real-time P-CPICH Ec/No)RRC connection setup - measurement on RACHIntra-RNC handover - reported in eventsOther cases - CpichEcNo configured in the OMC

OutlineFeature DescriptionFunction Introduction Related Measurement Downlink Power-Based Admission Control Uplink Interference-Based Admission Control Case Study DL Power Admission UL Interference Admission

Parameter Configuration Downlink admission threshold (Pthreshold)Pthreshold= MAXDlTxPwr* DchDlAcThresh

Admission Procedure

OutlineFeature DescriptionFunction Introduction Related Measurement Downlink Power-Based Admission Control Uplink Interference-Based Admission Control Case Study DL Power Admission UL Interference Admission

Parameter Configuration Uplink admission threshold (Ithreshold) Ithreshold= N0+ DchUlAcThresh

Utran Cell (utranCell)

DchUlAcThresh

Access Control Related to Basic Priority(BPriAc)

BPriAcIndex

Basic Priority Management(BasPri)

BasicPrio

Admission Procedure

OutlineFeature DescriptionFunction Introduction Related Measurement Downlink Power-Based Admission Control Uplink Interference-Based Admission Control Case Study DL Power Admission UL Interference Admission

Case 1: DL Power Admission Prerequisites All network elements satisfy global prerequisites.NodeB is configured 1+1+1 with 1 Baseband Units.Cell1 belongs to RNC1/NodeB1.Cell1 supports HSDPA+HSUPA+R99.Set appropriate Ptx power access threshold, so that only one pair CS12.2K can be established before DL Ptx reaches the admission threshold.The function of DL admission control is enabled.Rel99 UE1, UE2, UE3 and UE4 camp in cell1 in idle mode.UE3 and UE4 are subscribed as queueing_not_allowed.

Case 1: DL Power Admission Test Steps UE1 makes an originating AMR 12.2K call to UE2 in cell1. The call is set up successfully.UE3 makes an originating AMR 12.2K call in cell1 to UE4, because after the UE3 access in cell1 the DL power will larger than the admission threshold, so UE3 is rejected due to cell1 DL power.

Parameter ConfigurationObtain the basic priority from this table using traffic class, ARP and THP (QoS parameters configured in RAB Request message by CN):

Parameter ConfigurationSet appropriate Ptx power access threshold, so that only one pair CS12.2K can be established before DL Ptx reaches the admission threshold:

Parameter ConfigurationThe function of DL admission control is enabled:

Test Result Analysis UE1 makes an originating AMR 12.2K call to UE2 in cell1. The call is set up successfully;

UE3 and UE4, Subscribed as queueing_not_allowed

UE3 Makes a Call to UE4, Rejected due to DL Power Shortage

OutlineFeature DescriptionFunction Introduction Related Measurement Downlink Power-Based Admission Control Uplink Interference-Based Admission Control Case Study DL Power Admission UL Interference Admission

Case 2: UL Interference Admission PrerequisitesAll network elements satisfy global prerequisites.Cell1 belongs to RNC1/NodeB1.Cell1 supports HSDPA+HSUPA+R99.Rel99 UE1, UE2, UE3 and UE4 camp in cell1 in idle mode.

Case 2: UL Interference Admission Test Steps UE1 makes an originating AMR 12.2K call to UE2 in cell1. The call is set up successfully.UE3 makes an originating AMR 12.2K call in cell1 to UE4, because after the UE3 access in cell1 the UL Interference will larger than the admission threshold, so UE3 is rejected due to cell1 UL Interference shortage.

Parameter ConfigurationThe Background Noise Adjust Switch is set as Open:

Parameter ConfigurationSet appropriate UL Interference overload threshold of cell1, so that only one pair CS12.2K can be established before UL Interference reaches the admission threshold:

Parameter ConfigurationThe function of UL admission control is enabled:

Test Result Analysis UE1 makes an originating AMR 12.2K call to UE2 in cell1. The call is set up successfully.

UE3 and UE4, Subscribed as queueing_not_allowed

UE3 call UE4, Rejected due to UL Interference Shortage

Q&AAny question?