HSDPA related queries

[fon909]

Hi,

Can someone please help with the following queries for an E******* system;

1. How to calculate no. of HS users per cell?
2. How to calculate HS code utilization per user?
3. How to calculate HS power utilization per user?
4. How to calculate HS CE utilization per user?

Answers to these questions will help a lot with further analysis.


Thanks.

[fon909]

And also, what could be causes of degrading user tput while cell tput is constant.

[khurrambilal01]

Most probably the number of users have increased and overall cell throughput is the same but user throughput has degraded due to more sharing amongst users.

And also, what could be causes of degrading user tput while cell tput is constant.

[fon909]

In the back drop of more no. users can we know which resources are being exhausted the most.

[Evghenii]

1. You should monitor the value of the counter pmCapacityHsDschUsers

####################################################################################################################################
MO Class Pm Counter Type Flags
####################################################################################################################################
HsDschResources pmCapacityHsDschUsers sequence:long [21] PDF,ropReset
------------------------------------------------------------------------------------------------------------------------------------
The distribution of the number of HS-DSCH users, as percentages of the corresponding license limit.
Counter type: PDF
Counter is reset after measurement interval: Yes
Condition: Sampled each second of the granularity period (gives 900 values). HS-FACH is not applicable to this counter and HS-FACH transmissions do consequently not trigg
er the stepping of this counter. The actual measurement is started when the HS-DSCH resources are setup.

2. It's hard to calculate the average number of codes per user. I advise you to look at the following counters:
####################################################################################################################################
MO Class Pm Counter Type Flags
####################################################################################################################################
HsDschResources pmUsedHsPdschCodes sequence:long [16] PDF,ropReset
------------------------------------------------------------------------------------------------------------------------------------
The distribution of the HS-PDSCH code utilization, as the number of HS-PDSCH codes used by the scheduler. Also includes codes used for HS-FACH.
Counter type: PDF
Counter is reset after measurement interval: Yes
Condition: Sampled each 100 ms of the granularity period (gives 9000 values). The actual measurement is started when the HS-DSCH resources are setup.

####################################################################################################################################
MO Class Pm Counter Type Flags
####################################################################################################################################
HsDschResources pmRemainingResourceCheck sequence:long [3] PDF,ropReset
------------------------------------------------------------------------------------------------------------------------------------
The reason why it is not possible to schedule another high-speed user.
Counter type: PDF
Counter is reset after measurement interval: Yes
Condition: There are three resources needed for HSDPA user transmission: HS-SCCH codes, HS-PDSCH codes and HS-PDSCH power. These are recorded in separate counter entries.
For every subframe and after every scheduled user the Remaining Resource Check function is activated. The counter monitors the function and therefore only steps in activ
e subframes. When it is not possible to schedule another user in the subframe because of resource shortage the counter records the first found reason. As soon as one reso
urce is found short checking stops, thus only one resource counter entry can be incremented per subframe. The function checks the resources in order of counter entry inde
x starting with the lowest. Note that the counter steps even in case there are no more users valid for transmission in current subframe, i.e. even if no user that could h
ave used the resources. Resource shortage is considered for both CELL_DCH and HS-FACH users. A HS-FACH user is a UE which is in RRC state CELL_FACH (on RNC level) and is
using transport channel HS-DSCH and not FACH. The counter reflects the cell perspective. The actual measurement is started when the HS-DSCH resources are setup.
PDF ranges:
[0]: HS-SCCH code shortage
[1]: HS-PDSCH code shortage
[2]: HS-PDSCH power shortage

3. It's not so important to know the average power per user. More useful is to find out how ofter Power is the limiting factor for providing HS services. Motinor pmRemainingResourceCheck (HS-PDSCH power shortage).

4. Here you also need not the average CE consumption per user, but the number of times when the user was rejected due to CE congestions:

####################################################################################################################################
MO Class Pm Counter Type Flags
####################################################################################################################################
DownlinkBaseBandPool pmCapacityAllocRejDlCe long Peg,ropReset
------------------------------------------------------------------------------------------------------------------------------------
The number of attempts to allocate DL Channel Elements that are rejected (related to bin [0] of pmCapacityDlCe).
Counter type: Peg
Counter is reset after measurement interval: Yes
Condition: Stepped each time an attempt to allocate a DL CE is rejected. The actual measurement is started when the DownlinkBaseBandPool is created.
Undefined value: -1
************************************************************************************************************************************
UplinkBaseBandPool pmCapacityAllocRejUlCe long Peg,ropReset
------------------------------------------------------------------------------------------------------------------------------------
The number of attempts to allocate UL Channel Elements that are rejected (related to bin [0] of pmCapacityUlCe).
Counter type: Peg
Counter is reset after measurement interval: Yes
Condition: Stepped each time an attempt to allocate an UL CE is rejected. The actual measurement is started when MO UplinkBaseBandPool is created.
Undefined value: -1
************************************************************************************************************************************

[RF-SYR]

Hi,

Can someone please help with the following queries for an E******* system;

1. How to calculate no. of HS users per cell?
2. How to calculate HS code utilization per user?
3. How to calculate HS power utilization per user?
4. How to calculate HS CE utilization per user?

Answers to these questions will help a lot with further analysis.


Thanks.

Why do you need these answers?

[rne_battou]

Greetings
Here is a file with some formulas
Formulas RNC.txt

[cterms]

haye whats their with formulas

[ritgail]

HS users no..increase is done based on hsdenied adm peg if it very high....
If you have license go for it....HS power=Maxdl-prwadm-offset....if you have dynamic code and power allocation enabled i think you dont have to go into deep of hs...because scheduling algo is not that straight forward...
Do you got the point...or u can elaborate why these requirements come...may be we can figure out the situation

[ritgail]

one more thing there resource id allocation procedure for hs in e*******..varies from 3000 to 6000 series of RBS...so may be what is your expected throughput along with backhaul requirment ...these r/ids are allocated and reserved/separated from r99...