S7=S6P
= [.75 .25]\(\par \begin{bmatrix}.8&.2\\ .6&.4\\ \end{bmatrix}\)
= [.75 .25]
It is visible that the probability of being in state A is not increasing at all and for B is not decreasing at all.
This is called stationary matrix because it is stationed at P = [.75 .25] and it is not changing as it is in steady mood. Thus, this process is called Markov process.
DRX allows an idle UE to power off the radio receiver for a predefined period(called the DRX cycle)instead of simultaneously listening to the radio channel.The system always transmits frames.The UE needs to be synchronized with every frame and wake up immediately before the transmission starts.When there are high traffic loads, there may not be any announce of arrival of traffic in UE so that no delay can be occurred.At a result the UE will consume extra unnecessary battery power.The DRX is applied then the UE is not forced to wake up at every announcement instead the UE disable the RF part to put the receiver in sleep for specific period of time and omit some of the announcement to reduce power consumption.When the UE wakes up then the UE needs to send a wake up frame to the network that its RF part has been enabled again and ready to receive frame that is distained for specific UE.To improve user equipment (UE)battery lifetime, LTE supports Discontinuous Reception(DRX)in both the RRC IDLE and the RRC CONNECTED radio resource control(RRC)states.DRX allows UEs which are not receiving data from their corresponding eNodeB (eNB)to monitor the physical downlink control channel (PDCCH)discontinuously.When UEs are not listening to the PDCCH, they can enter a power saving mode in which most of their circuits can be turned off, thus reducing power consumption significantly.With DRX, the UE only wakes up periodically to listen to the PDCCH for a while, returning to the low power mode if no packet arrival is detected or resuming its normal operation in the case of new packet arrivals [10].