Downlink call admission control algorithm with look-ahead calls for 3GPP LTE mobile networks

ABSTRACT

3GPP Long Term Evolution (LTE) broadband mobile wireless network has been put in place to support diverse IP based traffic such as voice, data and multimedia. In order to support the various integrated services and the ever growing multimedia applications with guaranteed quality of service (QoS), a resource provisioning mechanism is becoming a major demand. Call Admission Control (CAC) is one of the main resource management components that limit the number of connections to the system capacity and guarantee the QoS of ingoing calls. In this paper, we propose a novel CAC algorithm that considers admission of calls for future startup. We consider also the immediate and handoff calls with certain priority admission scheme. We then use a stochastic discrete-event simulator to evaluate the performance of the CAC algorithm. The results obtained for look-ahead admission are compelling and indicate the usefulness of making advance resource reservations.

REFERENCES

• 1: Long Term Evolution (LTE): an introduction, October 2007, White Paper, Ericsson.
• 2: 3GPP TS 23.401 V8.4.1 (2008--12).
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• 4: M. Anas, C. Rosa, F. D. Calabrese, K. I. Pedersen and P. E. Mogensen, "Combined admission control and scheduling for QoS differentiation in LTE uplink," VTC 2008 Fall -- 68th IEEE Vehicular Technology Conference, September 21--24, 2008 Calgary, Canada
• 5: D. Hong and S. S. Rappaport. "Traffic Model and Performance Analysis for Cellular Mobile Radio Telephone Systems with Prioritized and Non-prioritized Handoff Procedures, "IEEE Transactions on Vehicular Technology, VT-35, (3) (1986), pp. 77--92.
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• 7: A. Qing and Agrawal "Performance Analysis of a Handoff Scheme in Integrated Voice/Data Wireless Networks," IEEE Transactions on Vehicular Technology, 51(6) (2002), pp. 1469--1478.
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• 9: http://www.iro.umontreal.ca/~simardr/ssj/indexe.html

INDEX TERMS

Primary Classification:
  C. Computer Systems Organization
  C.4 PERFORMANCE OF SYSTEMS
      Subjects: Design studies

Additional Classification:
  C. Computer Systems Organization
  C.4 PERFORMANCE OF SYSTEMS
      Subjects: Performance attributes; Reliability, availability, and serviceability; Modeling techniques

General Terms:
Algorithms, Design, Experimentation, Management, Performance, Reliability

Keywords:
3GPP, LTE, advance reservation, call admission control, hand-off, immediate reservation, mobile