Optimized delay threshold scheduler for multimedia traffic over LTE downlink network

  • Mohamad I. ElhadadEmail author
  • Mohammed Abd-Elnaby
  • El-Sayed M. El-Rabaie


Allocation of radio resources is very critical to Long Term Evolution (LTE) mobile network. Therefore, it is essential to design and implement optimum scheduling schemes to satisfy the required Quality of Service (QoS) that is vital for Real Time (RT) applications. In this paper, a new scheduling strategy for supporting both RT and Non-RT (NRT) applications is presented. The proposed scheduling scheme performs the allocation process of the available radio resources at two levels. At the first level of the scheduler, an optimized delay threshold is proposed to efficiently control Resource Blocks (RBs) allocation for video traffic. At this level, all video packets are investigated, and only users with Head of Line (HoL) packets delay greater than the optimized delay threshold will be considered for the allocation process in the next level. However, at the introduced scheduler’s second level, RBs are assigned to RT packets according to HoL delays, based on an enhanced algorithm that depends on Earliest Due Date (EDD) mechanism. The behaviour of the introduced scheduling strategy is investigated and compared to the behaviour of other schedulers considered in this research. Simulation results demonstrate that the introduced two-level scheduling strategy provides the best level of quality for the supported services, especially for RT applications. It provides the lowest Packet Loss Rate (PLR) and packet delay, while achieving the highest throughput when compared to other schedulers considered in this research. In addition, the proposed two-level scheduler achieves the highest efficiency of the spectral and system capacity.





  1. 1.
    Ali S, Zeeshan M (2012). A Utility Based Resource Allocation Scheme with Delay Scheduler for LTE Service-Class Support. IEEE Wireless Communications and Networking Conference. 1450–1455Google Scholar
  2. 2.
    Andrews J, Ghosh A, Muhamed R (2007) Fundamentals of WiMAX – Understanding Broadband Wireless Networking. Pearson Education, IncGoogle Scholar
  3. 3.
    Capozzi F, Piro G, Grieco LA, Boggia G, Camarda P (2013) Downlink packet scheduling in LTE cellular networks: key design issues and a survey: communications surveys and tutorials. IEEE Commun Mag 15:2Google Scholar
  4. 4.
    Chadchan SM, Akki CB (2010) 3GPP LTE/SAE: An Overview. Int J Comput Electric Eng 2(5):806–814CrossRefGoogle Scholar
  5. 5.
    Chakravarthy C, Reddy P (2010) Modified queue-based Exponential rule scheduler for improved QoS in OFDMA systems. Int J UbiComp (IJU) 1(2):34–43CrossRefGoogle Scholar
  6. 6.
    Christantus ON, Chidera LA, Cosmas IA (2016) Improved MLWDF scheduler for LTE downlink transmission. Int J Electron 103(11):1857–1867CrossRefGoogle Scholar
  7. 7.
    Clark MA, Psounis K (2017) Equal interference power allocation for efficient shared Spectrum resource scheduling. IEEE Trans Wirel Commun 16(1):58–72CrossRefGoogle Scholar
  8. 8.
    Dahlman E, Parkvall S, Sköld J, Beming P (2007) 3G Evolution HSPA and LTE for Mobile Broad band. Elsevier LtdGoogle Scholar
  9. 9.
    Dardouri S, Bouallegue R (2015) Comparative study of downlink packet scheduling for LTE networks. Springer, Wireless Personal Commun 82:1405–1418CrossRefGoogle Scholar
  10. 10.
    Elhadad M, El-Rabaie E, Abd-Elnaby M (2014) Enhanced PF scheduling algorithm for LTE downlink system. Mob Comput J 3:1Google Scholar
  11. 11.
    Elhadad M, El-Rabaie E, Abd-Elnaby M (2016). Resource allocation for Real-Time services using Earliest Due Date mechanism in LTE networks. 2016 Fourth International Japan-Egypt Conference on Electronics, Communications and Computers. 9–12Google Scholar
  12. 12.
    Elsayed K, Khattab A (2006) Channel-aware earliest deadline due fair scheduling for wireless multimedia networks. Springer Wireless Personal Commun 38(2):233–252CrossRefGoogle Scholar
  13. 13.
    Guo Y, Yang Q, Liu J, Kwak KS (2017) Cross-layer rate control and resource allocation in Spectrum-sharing OFDMA small-cell networks with delay constraints. IEEE Trans Veh Technol 66(5):4133–4147Google Scholar
  14. 14.
    Halonen T, Romero J, Melero J (2003). GSM, GPRS, and Edge Performance: Evolution towards 3G / UMTS. John Wiley & Sons LtdGoogle Scholar
  15. 15.
    Hashem M, Barakat S, AttaAlla M (2017) Enhanced tree routing protocols for multi-hop and multi-channel cognitive radio network (EMM-TRP). Elsevier, J Netw Comput Appl:69–79Google Scholar
  16. 16.
    He H, Shan H, Huang A, Cai LX, Quek TQS (2017) Proportional fairness-based resource allocation for LTE-U coexisting with Wi-fi. IEEE Access 5:4720–4731CrossRefGoogle Scholar
  17. 17.
    Hsu C-C, Morris Chang J (2017) Spectrum-energy efficiency optimization for downlink LTE-A for heterogeneous networks. IEEE Trans Mob Comput 16(5):1449–1461CrossRefGoogle Scholar
  18. 18.
    Kakuba S, Kyanda S, Kaawaase, Michael O (2017) Modeling improved low latency queueing scheduling scheme for Mobile ad hoc networks. Int J Digit Info Wireless Commun (IJDIWC) 7(2):75–92CrossRefGoogle Scholar
  19. 19.
    Kalangiam S, Selvamani D (2014) Cross layer multiserve scheduling for Mobile. Int J Innovative Res Sci, Eng Technol (IJIRCCE) 3(11):17613–17617Google Scholar
  20. 20.
    Karachontzitis S, Dagiuklas T, Dounis L (2012) Fair Cross-layer Scheme for Heterogeneous H.264/AVC Video Streams over LTE-based Broadband Systems. IEEE 8th Wireless Communications and Mobile Computing Conference. 1006–1010Google Scholar
  21. 21.
    Khan N, Martini M, Bharucha Z, Auer G (2012) Opportunistic Packet Loss Fair Scheduling for Delay-Sensitive Applications over LTE Systems. IEEE Wireless Communications and Networking Conference. 1456–1461Google Scholar
  22. 22.
    Labyad Y, Mohammed M, Marzouk A, Abdelkrim H (2014) Impact of using G.729 on the voice over LTE performance. Int J Innov Res Comput Commun Eng (IJIRCCE) 2(10):5974–5981Google Scholar
  23. 23.
    Larmo A, Lindström M, Meyer M, Pelletier G, Torsner J, Wiemann H (2009) The LTE link-layer design. IEEE Commun Mag 47:52–59CrossRefGoogle Scholar
  24. 24.
    Lee YL, Loo J, Chuah TC, Ayman El-Saleh A (2017) Multi-objective resource allocation for LTE/LTE-A femtocell/HeNB networks using ant Colony optimization. Wirel Pers Commun 92(2):565–586CrossRefGoogle Scholar
  25. 25.
    Nardini G, Stea G, Virdis A, Sabella D, Caretti M (2017) Resource allocation for network-controlled device-to-device communications in LTEAdvanced. Wirel Netw 23(3):787–804CrossRefGoogle Scholar
  26. 26.
    Nidhi S, Manjit SB (2017) An optimal scheduling and routing under adaptive spectrum-matching framework for MIMO systems. Int J Electron 104(7):1238–1253CrossRefGoogle Scholar
  27. 27.
    Piro G, Grieco LA, Boggia G, Fortuna R, Camarda P (2011) Two-level downlink scheduling for real-time multimedia services in LTE networks. IEEE Trans Multimed 13(5):1052–1065CrossRefGoogle Scholar
  28. 28.
    Piro G, Grieco L, Boggia G, Capozzi F, Camarda P (2011) Simulating LTE cellular systems: an open-source framework. IEEE Trans Veh Technol 60(2):498–513CrossRefGoogle Scholar
  29. 29.
    Rodriguez DZ, Rosa RL, Nunes RD, Emmanuel TA (2016) Assessment of quality-of-experience in telecommunication services. Int J Digit Info Wireless Commun (IJDIWC) 6(4):241–259CrossRefGoogle Scholar
  30. 30.
    Sadiq B, Madan R, Sampath A (2009). Downlink scheduling for multiclass traffic in LTE. EURASIP Journal on Wireless Communications and Networking. 1–18Google Scholar
  31. 31.
    Sundaresan K, Rangarajan S (2012) Adaptive Resource Scheduling in Wireless OFDMA Relay Networks. Proceedings IEEE INFOCOM. 25–30Google Scholar
  32. 32.
    Takeda K, Kawamura T, Kishiyama Y (2011) Experimental Evaluation on Carrier Aggregation and Multi-user MIMO Associated with EVD-Based CSI Feedback for LTE-Advanced Downlink. IEEE, the 8th International Symposium on Wireless Communication SystemsGoogle Scholar
  33. 33.
    Talevski D, Gavrilovska L (2012) Novel scheduling algorithms for LTE downlink transmission. TELFOR J 4:1Google Scholar
  34. 34.
    Wang Y-C, Hung-Yi KO (2017) Energy-efficient downlink resource scheduling for LTE-A networks with carrier aggregation. J Inf Sci Eng 33(1):123–141MathSciNetGoogle Scholar
  35. 35.
    Yaacoub E (2012) Performance Study of the Implementation of Green Communications in LTE Networks. IEEE International Conference on Telecommunications. 1–5Google Scholar
  36. 36.
    Yildiz Ö, Sokullu R. (2017) A novel mobility aware downlink scheduling algorithm for LTE-A networks. In Ubiquitous and Future Networks (ICUFN), 300–305Google Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Mohamad I. Elhadad
    • 1
    Email author
  • Mohammed Abd-Elnaby
    • 1
  • El-Sayed M. El-Rabaie
    • 1
  1. 1.Department of Electronics and Electrical Communications, Faculty of Electronic EngineeringMenoufia UniversityMenoufEgypt

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