Bandwith limitation

[_lisi4king]

Good day.

I've made a IMSI trace on Huawei UMTS LMT. And i see bandwidth on my test user = 14 Mbps, but this is user uses HSPA+ modem, on cell 64-QAM activated, no limitation on IUB (optic line), no limitation on SIM (21 Mbit in profile).

So, where is limitation? Why i see 14 Mbps not 21??? :confused:

[wolverine]

What is the CQI reported by the user?

How many codes are available for HSDPA? Are any of them used by R99?

Is this the only user in the cell?

Is there enough DL power?

All these play an important role.

[gandhibapu]

Along with this the Category of Hsdpa in Modem is also important.
High-Speed Downlink Packet Access - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/High-Speed_Downlink_Packet_Access)

[_lisi4king]

Dear Friens.

Have you ever saw LMT Huawei Trace, which has a name DL thrpougput&bandwidth? On this trace you see subscruber real thrpougput and his capability (bandwidth). And my qeastion was about bandwidth, but not about how to rich this value.

[dodotiro]

Good day.

I've made a IMSI trace on Huawei UMTS LMT. And i see bandwidth on my test user = 14 Mbps, but this is user uses HSPA+ modem, on cell 64-QAM activated, no limitation on IUB (optic line), no limitation on SIM (21 Mbit in profile).

So, where is limitation? Why i see 14 Mbps not 21??? :confused:

have you check the code allocation on the cell ?

[_lisi4king]

have you check the code allocation on the cell ?

Yes, it is OK. And we had on this cell - 18Mbps. But now strange. And again qestion is not how to rich this 21Mbps. I have qestion about capability.

[boring]

A very common reason to reduce HSDPA throughput is the lack of sufficient capacity of the uplink (HSUPA in this case) to transmit TCP ACKs

(unless you did a UDP-based throughput test)

[_lisi4king]

A very common reason to reduce HSDPA throughput is the lack of sufficient capacity of the uplink (HSUPA in this case) to transmit TCP ACKs

(unless you did a UDP-based throughput test)

Please see my attached srceenshot.

[adewijaya]

1. UE/ Modem Capablelity
2. Card Capablelity related to HLR

[agenov]

Please see my attached srceenshot.


What is the Nodeb type ?

BR
Alex

[adewijaya]

i'm afraid with your Modem (you said this is user uses HSPA+ modem), what's exact number on your HSPA+ modem? next question is how many bandwidth do you have just only for HS or sharing resource then finally is did you activated all feature on Node B? but i'm sure because of your modem limitation or SAPC limitation if you implemented throtling E2E QoS

[_lisi4king]

What is the Nodeb type ?

BR
Alex

DBS 3900.

Modem was HSPA+. SIM profile - 21M limitation.

[_lisi4king]

i'm afraid with your Modem (you said this is user uses HSPA+ modem), what's exact number on your HSPA+ modem? next question is how many bandwidth do you have just only for HS or sharing resource then finally is did you activated all feature on Node B? but i'm sure because of your modem limitation or SAPC limitation if you implemented throtling E2E QoS

Was ZTE MF668.

I hope all features activated. 64-QAM activated defenetly.

SAPC - what is it? :rolleyes:

[adewijaya]

some PCRF to control bandwidth per user, yes your modem can support 21Mbps i already checked, so next question is how many carrier you use it?

[_lisi4king]

some PCRF to control bandwidth per user, yes your modem can support 21Mbps i already checked, so next question is how many carrier you use it?

On this cell - one only. But do not forget, that we had 18 Mbps on this cell, but i do not remember (and i do not have data) what was with bandwidth.
I can gues, that limitation was 21M. So, what was changed? Something on SGSN, transport, NodeB settings, where to find it?

Profile from HLR:

[adewijaya]

you can uses ping test to your RNC with a big packet then see max throughput for this, finally after you see it how much rates in LMT so you can define which part will be getting smaller bandwidth

[_lisi4king]

Ping UE from RNC

[zhanglw268]

What's your SGSN and GGSN's QoS setting and license setting? Do they allow you to exceed the 14.4Mbps?

[adewijaya]

Ping UE from RNC

Okey, i got some suspect : i have been do this same way, finally after card re-provisoning so the limitation of bandwidth is clear, this problem happend in my network using Iphone4. Please reconfirm with Core Engineer with this card capablelity :), another thing is double check with your APN used. Hope this is will clearing your problem

[Tomas Delgado]

Mate, check the HLR assigned dl bandwidth for that IMSI. If you already checked the RAN part check that.