Channel switching parameter tuning _Practical experiences

[electron]

Hi all,


I gonna have a study for channel switching parameter tuning in a network. Your practical experiences will help me so much.

How we should decide about timers(Is there any way to have a rough estimation by statistics?)
Is it really needed to manipulate the parameters on channel switching and transition states and change the default values?
What will be the achivment for this feature tuning (MP load reduction, User perceived throughput, HS/EUL/R99/FACH Drop reduction,Better capacity efficiency ,...)

Please share report or result of your practical study it will help to others also


Thanks

[ayomm86]

Hi,
I hope this could be useful to you,take time and read through and if it worth adding reputation ,please dont hesitate to do it.


The purpose of Channel Switching is to optimize the use of the radio resources by dynamically changing the physical resources allocated to the interactive RAB users.Channel Switching is applied only to best effort packet data traffic. This traffic has little or no Quality of Service attributes that apply. It belongs to the Interactive and Background Quality of Service classes, which have no guaranteed bit rates and no packet delay requirements.When there are plenty of resources available, the best effort user receives high bit rates but when the system is heavily loaded and there are not many resources left, the bit rates offered may be lower. A best effort user may not be given any bandwidth at all, since there are no guarantees.In WCDMA best effort packet data can be sent on both dedicated and common transport channels. When large amounts of data are being sent or received, a dedicated transport channel is used. The supported bit rates are64/64, 64/128 and 64/384 kbit/s. For small amounts of data, a common transport channel may be used. In this case a maximum of 32 kbit/s is shared between the users in a cell.Each channel (FACH /RACH/DCH) requires resources that are “fixed”allocated to that channel (such as DL channelization codes, RBS hardware,RAKE receivers, coding processors etc). Regardless if the channel is used or not the resources allocated to that channel cannot be used by another channel. In the RNC each user has resources allocated but the most limitingresources are the air interface resources (interference/power and the RBS hardware) so it is important to optimize the usage of these as much as possible.
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