Jun 232009
In Cell_DCH state, regardless of data transmission or reception, DPCCH channel needs to be up.
This is why.
Jun 212009
10ms radio frame is subdivided in 15 time slots.
Each one has 2560 chips.
The concept of time slot is not at all the same as in TDMA (where users are multiplexed from slot to slot).
Each time slot corresponds to a power control cycle. That is, the power amplifier need to be able to modify transmitted power [...]
Jun 212009
If data rate is high, then UE need to transmit data with high Tx power.
If data rate is low, then UE can transmit data with low Tx power.
Why Tx power is proportional to data rate?
There is a quality requirement Eb/No to retain.
Eb/N0 = (W/Rb)* SIR
where Rb is data rate.
If Rb is increased, then SIR also [...]
