The mobile network radio interface requires a sync stability of 5x10-8s. Such stability cannot currently be provided while connecting Node X via a packet switched network like WiMAX. It hence seems that synchronization can be a serious blocking factor for using WiMAX as a UTRAN backhauling system. Fortunately there are 3 candidate solutions that can overcome this issue. These are NTP, IEEE 1588 and SYNCoIP. The reference is transported over IP in ‘CE’ style. It is very QoS dependent and development is not finalized. However the required accuracy is achieved and relied on IP only and is developed from existing techniques.
For modeling traffic, coverage and capacity cannot be separated -traffic has to be considered in network planning.
Multiple knapsack- For rough capacity estimations the soft capacity feature of the WCDMA is sometimes neglected. Instead each cell is assumed to have a fixed capacity v. The capacity value can be considered an amount of Erlang that the cell can support. The set of demand points assigned to one cell can then easily be required to generate no more than v units of traffic.
∑_p▒〖A(p)yp,i≤〗 v

A single, linear constraint of the type in the above with positive co effectiveness is called a knapsack constraint- multiples are derived from them.
Receiver performance related to the sensitivity level and thermal noise (spectral density, Boltzmann constant –from statistical physics ……..receiver sensitivity level in dBm =

10log10 (e/No Rb.k.T.F/0.001(w)) = receiver_sensitity_level (dbm)+30db.

i have listed the replies to some of the queries asked by some members of this forum -sorry i could not address it specifically to anyone specifically...hope it helps

The Network Simulator also known as - ns-2.Ns is a discrete event simulator targeted at networking research. Ns provides substantial support for simulation of TCP, routing, and multicast protocols over wired and wireless (local and satellite) networks.

However my favorite is Optonet--http://www.opnet.com/

hello
i was designing around WiMAX components to look for low noise designs for RF transceivers. The CHIP of my interest is MAX2839. The great thing about MAxim is you can request for samples and they have excellent technical support..a great company !