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Mobile broadband networks are continuously faced with the challenge of limited resources due to the increasing demand for high speed Internet services. To manage these resources, call admission control (CAC) which determines whether or not a connection request should be accepted or rejected is one of the resource management techniques usually deployed. A Dynamic QoS-aware CAC algorithm was recently proposed to improve resource utilization. However, the algorithm detects congestion of the network only after it has occurred, which leads to increase in blocking probability and thus lead to reduction in throughput. In this paper, a congestion control call admission control (CC-CAC) algorithm is proposed to reduce call blocking and increase throughput of all connection classes. The CC-CAC employs a congestion control mechanism that regulates the base station buffer to operate at a target threshold. It also employs a dynamic bandwidth degradation mechanism to degrade the resources of the admitted connections when resources are not sufficient to admit more connections. The algorithm is evaluated using simulation. The results show that the proposed scheme outperforms the benchmark scheme in terms of decrease in blocking probability and increase in throughput for all connection classes.

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References

  1. . Huan, C., Sunil, K., & C-C. J. K. Dynamic call admission control scheme for QoS priority handoff in multimedia cellular systems? IEEE Wireless Communications and Networking Conference, 2002, 4, pp. 114-118.
     Google Scholar
  2. Kalikivayi, S., Misra, I. S., & Saha, K. Bandwidth and delay guaranteed call admission control scheme for QOS provisioning in IEEE 802.16e mobile WiMAX. In IEEE Global Telecommunications Conference (GLOBECOM), 2008, pp. 1-6.
     Google Scholar
  3. Saidu, I., Subramaniam, S., Jaafar, A., & Zukarnain, Z. A. ?A QoS-Aware CAC with Bandwidth Reservation and Degradation Scheme in IEEE 802.16e Networks?, Wireless Personal Communications 2015, 82(4), pp. 2673-2693.
     Google Scholar
  4. Lee Y, Chuah T, Loo J, Vinel A. Recent advances in radio resource management for heterogeneous LTE/LTE-A networks. IEEE Communications Surveys & Tutorials 2014; 16(4): 2142?2180.
     Google Scholar
  5. Shu?aibu, D. S. and Syed Yusof, S. K. Link aware call admission and packet scheduling for best effort and UGS traffics in mobile WiMAX. International Journal of the Physical Sciences, 2011, 6(7), 1694-1701.
     Google Scholar
  6. Mohammed A, Solomon Y, Isah B, Saidu I. A dynamic QoS-aware call admission control algorithm for mobile broadband networks. IEEE International Conference on Computing Networking and Informatics (ICCNI) 2017; 1(1): 1-6.
     Google Scholar
  7. Romesh L., & Iti ,S.M. A Bandwidth Efficient Adaptive Call Admission Control Scheme for QoS Provisioning in IEEE 802.16e Mobile Networks. Int J Wireless Inf Networks (2011), pp.108?116
     Google Scholar
  8. Rashidi, B.S., Taheri, H., Sabaghi. M., & Fathi, M. A new Call Admission Control algorithm for IEEE802.16 networks?, In 2010 International Conference on Computer Design and Applications (ICCDA), 2010, 4, 361--365.
     Google Scholar
  9. Wongthavarawat, K., & Ganz, A. Packet scheduling for QoS support in IEEE 802.16 broadband wireless access systems. International Journal of Communication Systems, 2003, 16, 81?96.
     Google Scholar
  10. Wang, H., Li,W.&Agrawal, D.P. Dynamic admission control and QoS for 802.16 wireless MAN. In Wireless Telecommunications Symposium, 2005, 60?66.
     Google Scholar
  11. Ganesh, J.S. and Bhuvaneswari, P.T.V. Enhanced Call Admission Control for WiMAX networks, In Recent Trends in Information Technology (ICRTIT), International Conference, Chennai, June 3-5, 2011, 33-36.
     Google Scholar
  12. Shwetha, D., Kumar, M.N., & Devaraju, J.T. Modulation Aware Connection Admission Control and Uplink Scheduling Algorithm for Wimax Networks". International Journal of Wireless & Mobile Networks, 2015, 7(1), 75-92.
     Google Scholar
  13. Wang, C., Yan, W.J. & Lo, H.K. Dynamic admission control and bandwidth reservation for IEEE 802.16e mobile WiMAX networks. EURASIP Journal on Wireless Communications and Networking, 2012, 1-20.
     Google Scholar
  14. Patel, Z. & Dalal, U. Improved CAC Scheme for WiMAX with Adaptive Bandwidth Reservation and Degradation Policy. Int'l Journal of Computing, Communications & instrumentation Eng. (IJCCIE), 2015, 2(2), 144-149
     Google Scholar