- This topic has 9 replies, 1 voice, and was last updated 6 years, 8 months ago by mounir.
19th December 2010 at 09:42 #65327RITTAGuest
i have a strong experience in BSS ERICSSON 2G,but i want to learn the 3G,so can some one advice me for begining???
regards21st December 2010 at 06:35 #65328nuxGuest
start learn concept of WCDMA, it will help you understand how 3G network operates28th December 2010 at 14:54 #65329aterGuest
Once you´ve finished with the wcdma concepts as nux said you will need to spend several hours reading alex and surfing business objects to get close with the KPIs and counters
I have a lot of information about setting and KPI monitoring if you are interested29th December 2010 at 06:13 #65330AnjellaGuest
Me to new in 3G please sahre the KPIs to first I shall start to look.
Anjella30th December 2010 at 04:15 #65331nuxGuest
nice offer ater :), can you share some KPI sample?9th January 2011 at 01:44 #65332AterGuest
The 4 Basic ones (traffic, accesibility, reteinability and integrity)
PS or CS or HS Accesibilitty= (RRCfailrate * RABfailrate * Iubfailrate)
Iubfailrate always close to 100% (so the main factors here are RRC and RAB fail rate
Each service has its own counter (speech, CS64, HS, etc) with pretty much the same name (mo: utrancell)
Drop rate: for some engineers (me included) only usefull for speech. There are specifics couters to calculate the KPI and to indicate the reason for the drop you need to look for them in Alex ( mo: utrancell)
Minutes per drop: related to reteinability for PS or HSDPA
There are specifics couters to calculate the KPI look for them in Alex ( mo: utrancell)
Traffic: Speech erlangs, PS_R99 HSDPA and HSUPA (erlangs, Kbps and number of simultaneous users)
Integrity: The most important is the Throughput for R99, HSDPA and HSUPA(measured in RNC and nodeb)
There are a lot more for monitoring and troubleshooting but to long to explain here: Noise rise, classA B or C fail rate and VC utilization (in case of atm iub links). Monitoring of scheduler resourses, bler and cqi monitoring, Channel elements utilization.11th January 2011 at 03:39 #65333nuxGuest
ater, as i am now involve in CS core network integration, what things i have to learn first? i’ve been in RAN for 4 years but this is my first time in core network.12th January 2011 at 18:17 #65334AterGuest
Since umts introduces several changes to the GSM core You’ll need to study several things but it depends on your particular task what you should focus on
There re many articles on the web that will give you an idea4th February 2011 at 09:53 #65335DJGuest
Any clue how to convert the HSDPA data volume (KB) into Erlangs??
Is there any direct relation between the above two.
As I understand, Erlang means a channel seized for one hour and within this, any amount of data can be downloaded based on RAB established.
Plz comment.13th February 2014 at 12:29 #65336mounirGuest
je veux maitrisé le 3G