UMTS Architecture

According to TS 23.101 :"General UTMS Architecture"

UTMS architecture are split to user equipment domain and infrastructure domain.

User Equipment Domain
In layman's term, user equipment is a mobile phone which is to access the infrastructure through the air interface. Air interface is the air space between the mobile phone and the base station.

Infrastructure Domain
It consist of UMTS Terrestial Radio Access network (UTRAN) and core network.

UTRAN
UTRAN is the access network where the user equipment interact with Node B trough the air interface. "The Access Network Domain consists of the physical entities which manage the resources of the access network and provides the user with a mechanism to access the core network domain." The Technical document explained that Access Network Domain which also known as UTRAN consist of the physical entities. Physical entities in UTRAN are the Node B and Radio Network Controller (RNC).

Core Network
"The Core Network Domain consists of the physical entities which provide support for the network features and telecommunication services. The support provided includes functionality such as the management of user location information, control of network features and services, the transfer (switching and transmission) mechanisms for signalling and for user generated information."

patching...

To patch ns2.28 with umts module. First, download the patch from the EURANE website and ns2.28 from ns2 webiste. Untar the eurane patch and ns2.28. In the ns-2.28 directory type patch -p1 < ~/{patchfilename.diff} . After patching is completed, type ./install in the ns-allinone-2.28 directory. Update ns path in bashrc.

Reference

1.

umts links

Click Here...
A tutorial page on how to install ns on cgywin.

Ubuntu vs NS2

I found a guide how to install NS2.28 on Ubuntu. Ubuntu is a Live CD distro where user just pop the cd in the cdrom and start using the OS on booting without any installation. It runs on your computer's Ram. Click Here for the link.

Running through my mind...

I have some questions:-

1. How much bandwidth should I allocate to simulation model to simulate the RAN?
2. What is the packet rate?
3. How do I know that the simulated model is efficient with reference to the normal model?
4. How to proof the modified model is better than the current model?
5. Where can I find the parameters for the current diff serv model for RAN?
6. How do I transform that parameters so that I can use to simulate the model?

Found a new url today. Click here

Null

The null policy is use when all the incoming traffic in the physical queue is put in the a virtual queue without metering and policing.