LTE PRESENTAION

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<ol><li> 1. High Academy for Communication Collaboration with Omdurman Islamic University Presented by: Swar Eldahb Taha Elbala Supervisor: Dr. Khalid Hamid Bilal 1 E2E Delay Performance Evaluation in LTE-Network 2013 </li><li> 2. Objective: to evaluate End-to-End Delay in LTE network environment by using (VoIP) traffic &amp; take into account the affecting parameters End-to-End Delay </li><li> 3. 3 What is LTE ? In Nov. 2004, 3GPP began a project to define the long-term evolution (LTE) of Universal Mobile Telecommunications System (UMTS) cellular technology Higher performance Backwards compatible Wide application </li><li> 4. 4 Evolution of Radio Access Technologies 802.16d/e 802.16m </li><li> 5. 5 LTE Release 8 Key Features (1/2) Very low latency (Delay) Short setup time &amp; Short transfer delay Short hand over latency and interruption time High spectral efficiency OFDM in Downlink Single Carrier FDMA in Uplink Support of variable bandwidth 1.4, 3, 5, 10, 15 and 20 MHz </li><li> 6. 6 LTE Release 8 Key Features (2/2) Compatibility and interworking with earlier 3GPP Releases FDD and TDD within a single radio access technology Efficient Multicast/Broadcast </li><li> 7. 7 LTE Basic Concepts LTE employs Orthogonal Frequency Division Multiple Access (OFDMA) for downlink data transmission and Single Carrier FDMA (SC-FDMA) for uplink transmission </li><li> 8. 8 FDM vs. OFDM </li><li> 9. 9 LTE-Downlink (OFDM) Improved spectral efficiency Reduce ISI effect by multipath Against frequency selective fading </li><li> 10. 10 LTE Uplink (SC-FDMA) SC-FDMA is a new single carrier multiple access technique which has similar structure and performance to OFDMA </li><li> 11. 11 LTE Radio Access Network Architecture </li><li> 12. 12 Generic Frame Structure Allocation of physical resource blocks (PRBs) is handled by a scheduling function at the 3GPP base station (eNodeB) Frame 0 and frame 5 (always downlink) </li><li> 13. 13 Resource Grid One frame is 10ms 10 subframes One subframe is 1ms 2 slots One slot is 0.5ms N resource blocks [ 6 &lt; N &lt; 110] One resource block is 0.5ms and contains 12 subcarriers from each OFDM symbol </li><li> 14. 14 Cyclic Prefixes </li><li> 15. 15 Layered OFDMA The bandwidth of basic frequency block is, 1520 MHz Layered OFDMA radio access scheme in LTE-A will have layered transmission bandwidth, support of layered environments and control signal formats </li><li> 16. 16 Downlink System Model </li><li> 17. Opportunistic Packet Scheduling Algorithms Suitable for non real traffic It take into account channel quality and the past user throughput Proportional Fairness (PF) </li><li> 18. PF equation i (t): data rate corresponding to the channel state of the user i i is the mean data supported by the channel </li><li> 19. Opportunistic Packet Scheduling Algorithms designed to support multiple real-time data users in CDMA-HDR system It supports multiple data users with different QoS requirements. Maximum Largest Weighted Delay First (M-LWDF) </li><li> 20. M-LWDF Equation : where i (t) = data rate i is the mean data rate supported by the channel Wi (t) is the HOL packet delay ,where i=1,,N are weight takes into account instantaneous channel variations and delays in the case of video service </li><li> 21. Exponential Proportional Fairness (EXP/PF) This algorithm has been designed to increase the priority of real-time flows with respect to non-real-time ones this means that an user can belong (RT) or (NRT) services. </li><li> 22. Equation: where: </li><li> 23. Simulation &amp; Performance Evaluation performance evaluation for LTE-SIM Simulation Environments output results </li><li> 24. LTE-SIM Open source software ,written c ++ &amp; working Linux environments LTE-Sim has been conceived to simulate uplink and downlink scheduling strategies in multi-cell/multi-users environments taking into account user mobility, radio resource optimization, frequency reuse techniques and other aspects </li><li> 25. LTE nodes model </li><li> 26. Simulation Design: In the simulation design we will create three scenarios as follow: Scenario 1:Single cell Scenario 2: Single cell with interference Scenario 3:Multiple cell 29 </li><li> 27. 30 </li><li> 28. 1 Scenario 1: Single cell 31 </li><li> 29. Results 1 32 </li><li> 30. Results 2 33 </li><li> 31. Results 3 34 </li><li> 32. Scenario 2: Single cell with interference 35 </li><li> 33. Result 1 36 </li><li> 34. Result 2 37 </li><li> 35. Result 3 38 </li><li> 36. Scenario 3: Multi cell 39 </li><li> 37. Result 1 40 </li><li> 38. Result2 41 </li><li> 39. Result3 42 </li><li> 40. Conclusions As user increase the delay amount increase Maximum delay value 0.22 second in all scenarios (multi cell with hand over enable ) Proportional fairness has highest delay amount EXP/PF give much acceptable delay &amp; PLR in all scenarios 43 </li><li> 41. Recommendations Experience the delay amount in different congested traffic model (video &amp;FTP) in all scenarios and comparing them with VoIP result with same scheduling algorithm Perform the simulation with different bandwidth (1.3 , 5&amp;10 MHZ) Suggest new algorithm to minimize delay &amp; PLR value in VoIP traffic 44 </li><li> 42. Thank you ,, 45 </li></ol>