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

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. 4G LTE architecture.

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

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

  2. 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

  3. 4G LTE architecture

  4. 4G LTE architecture

  5. 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

  6. An analytical model for power saving

  7. An analytical model for power saving

  8. State 1 to state 1 and state 1 to state 2 State 3 to state 1

  9. Adjustable DRX time state for light sleep

  10. State 2 to state 1 and state 2 to state 3

  11. Transition probability matrix

  12. E[H1] (holding time of S1) calculation

  13. E[H1] (holding time of S1) calculation

  14. E[H2] and E[H3] calculation

  15. E[H2] and E[H3] calculation

  16. Power saving factor (PS)

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

  18. The probability a packet call delivery start for the ithadjustable DRX cycle

  19. The mean of wake up delay

  20. Numerical results TN: light sleep (Adjustable area) TA: Active mode TD: deep sleep * 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.

  21. Reference • IEEE ICC 2012 - Communication Software Services and Multimedia Applications Symposium

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