Help!!! UE cant make call due to lack of ASE DL /3G E*******

[linhhy]

Hi everyone,

Can you help me the difficult case in 3G E******* system:
I have some cells with same problem: UE cant make call due to congestion (lack of ASE DL) while both voice traffic and packet traffic are quite low.
I tried reset RBS (RBS3206) then problem fixed. But It will come back after few days.

In the system, I see almost RRC setup succes rate very low (<50%), caused by lack of ADE downlink.

Plz help me!

Thanks!

[adewijaya]

pmNoFailedRABEstAttemptLackDlASE Number of failed RAB establishment attempts due to lack of DL ASE
pmNoFailedRABEstAttemptLackUlASE Number of failed RAB establishment attempts due to lack of UL ASE

The default setting for the admission policy for the Air Interface
Speech Equivalents (ASE) in uplink aseUlAdm is based on the
characteristic dimensioning of the system not to be loaded more
than 60% of its pole capacity.
In the downlink, the downlink transmitted carrier power is the main
dedicated monitored resource used to control the air interface load.
aseDlAdm is a complement to the load control when the cell can
support so many users that it is close to the pole capacity, which
can cause instability. Therefore, if the downlink transmitted carrier
power is the limiting resource, aseDlAdm can be set very high, so
it does not interfere with the control strategy used for the downlink
transmitted carrier power.
In uplink, besides uplink Congestion Control, ASE is the only
resource that is controlled to allow admission and modifications.
Therefore, the parameters that regulate the uplink ASE admission
policy need to be set in order to minimize the risk of going into
uplink overload.
Admission Control blocks due to improper admission threshold
settings. There are nine admission policies to control the blocking.
They are UL ASE, DL ASE, DL TX cell power, spreading factor
usage, code usage, Hw usage, amount of HS users, congestion and
number of users in compressed mode. Understanding of which
cause(s) to trigger blocking is necessary to solve the problem.
When new resources are needed for a radio connection, (a new
radio link is set up or an existing radio link is modified), the
Admission Control function receives a request for admission. The
request specifies the estimated amount of dedicated monitored
resources that the radio connection needs. This estimation is
compared to the available resources and the configured limits for
admission set by the operator, and a response is sent out to grant or
deny the new radio link access to a cell.
To decide on the requests, the Admission Control function requires
information about the load on the dedicated monitored resources
and the amount of resources needed by the requester.
The solution to the admission control blocking problem is to check
if the admission thresholds (i.e. ulHwAdm, hsdpaUsersAdm
maximumTransmissionPower, aseUlAdmOffset,
beMarginAseDl, beMarginAseUl, beMarginDlCode,
compModeAdm, dlCodeAdm) match to the original planned
capacity.
If the thresholds do not match to the original planned capacity, the
admission thresholds have to be corrected. Otherwise, re-do the
radio network dimensioning to increase the system capacity or
activate the inter-frequency load sharing to increase the trucking
efficiency