# Dynamic channel assignment Based on real time channel state to allocate frequency to users. ## Advantages 1. Reduce the probability of blocking & drop call 2. Use actual interference, not worst case which increases capacity ## Disadvantages 1. Require [CSI](channel%20state%20information.md) at the [BS](Base%20station.md) 1. Need information about the channel/users 2. The extra information acts as a differentiator for users (grade A, grade B, grade C ...) 2. Keep tracking the [CSI](channel%20state%20information.md) (time varying channel) which has a high signalling overhead. 1. Need to send a signal to you saying "are you doing fine?" Packet based [communications](Communications.md) are better for peak seasons. ## When was it used? From [4G](4G.md) - frequency channel assignment can be dynamic based on [CSI](channel%20state%20information.md) and interference level. [^1] # References [^1]: [TELE4652-lecture-01](../../03%20-%20University/TELE4652/Lectures/TELE4652-lecture-04.pdf)