Speaker: Yu-Fu Huang Advisor: Dr. Kai-Wei Ke Date : 2013, Dec. 16.

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Presentation transcript:

Speaker: Yu-Fu Huang Advisor: Dr. Kai-Wei Ke Date : 2013, Dec. 16

Outline LTE and the DRX concept An analytical model for power saving Power saving factor (PS) The mean of wake up delay Numerical results Reference

4G LTE architecture

The procedure in the paper System state define Each state probability calculation Expectation of each state holding time Power saving factor The probability of packet call delivery start in DRX cycle The mean of wake up delay

An analytical model for power saving

State 1 to state 1 and state 1 to state 2 State 3 to state 1

Adjustable DRX time state for light sleep

State 2 to state 1 and state 2 to state 3

Transition probability matrix

E[H1] (holding time of S1) calculation

E[H2] and E[H3] calculation

Power saving factor (PS)

The probability a packet call delivery start for the ith fixed DRX cycle

The probability a packet call delivery start for the ith adjustable DRX cycle

The mean of wake up delay

TN=10Tds TN=20 TN=40 Cds TN: light sleep (Adjustable area) TD: deep sleep TA: Active mode Numerical results * TA: Longer (Ti as X-axis)  PS & E[D] in TN10, TN20, TN40, Cds are not much difference. * TN: Longer (Tds as X-axis)  E[D] is shorter & PS is lower due to go into TD lately. * TD: Longer (Tdl as X-axis)  Shorter in TN gets longer E[D] & higher PS.

Reference IEEE ICC COMMUNICATION SOFTWARE SERVICES AND MULTIMEDIA APPLICATIONS SYMPOSIUM

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