Date post: | 01-Nov-2014 |
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Correlation of HSUPA/EUL Admission Control
toHSUPA/EUL CSSR Degradation
Objectives
• The aim of this document is intended to outline the HSUPA Accessibilities performances (EUL CSSR) that have been degraded regardless the external activities affected
Overview
EUL CSSR’s Performances overview of RNRST01, RNRST02 and RNSNK01 for the past 2 months:1. RAB Establishment rejection show correlations to the EUL accessibilities for all
sampled RNCs2. Through the charts above, the worst performances come from RNSNK01 where the
RAB Establishment rejection’s rates show the highest for almost the entire period of monitoring above
3. In contrast to RNSNK01, the RNRST01 shows better performances than RNSNK01 and the rate of RAB EST rejection also low
Parameter Settings• The rejection of RAB
Establishment comes from the Admission Control indicated from pmNoOfNonHoReqDeniedEul counts
• Having quick check, the following parameter of eulServingCellUsersAdm has been set lower than the actual
• This parameter should be following maxNumEulUser and EUL Users’ license accordingly (licenseCapacityEulUsers)
Parameter Settings• The composition of parameter’ values: 8, 10, 16, 24 and 32• Should the parameter’s values reduction is meant for
pmNoAllowedEul’s improvement, then the previously agreed settings must be confirmed to implement at first
• If the optimized settings have been introduced but the pmNoAllowedEul to remain high, a solution of disabling the Eul channel should be taken
Example: U08-JMU0095• The following shows the example of JMU0095 for all cells
with the settings of the parameters are 10 for all
GPEH Analysis• The cells of JMU0095 to show relatively low EUL Served User
Peak percentage during the recording of 15.00 – 18.00
• The percentage of EUL served User Peak for the entire cells in RNSNK01 is as per attached & is subject to EUL User License upgrade soon:
SAMPLE RNSNK01 GPEH
Summary• EUL CSSR has been observed and degraded for months• Further analysis through statistics and GPEH indicate that the
degradation has been attributable to the Rejection of RAB Establishment by Admission Control
• Among several admission control of EUL component, a relevant parameter of eulServingCellUsersAdm have been variously set to not following the common settings
• Common settings: licenseCapacityEulUsers = maxNumEulUser (rbslocalcell) = eulServingCellUsersAdm (utrancell)
• Proposal: revert the parameter to follow the above common settings accordingly
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