This paper presents a Connection Admission Control (CAC) algorithm for Universal Mobile Telecommunications System (UMTS) networks based on an Approximate Dynamic Programming (ADP) Approach. To deal with the non-stationary environment due to the time-varying statistical characteristics of the offered traffic, the admission policy has to be computed periodically based on on-line measurements. If standard algorithms are used, the optimal policy computation is excessively time-consuming to be performed on-line. Thus, an ADP approach for the computation of a sub-optimal admission policy is proposed. The ADP approach is based (i) on the reduction of the policy space, and (ii) on an approximated state-space aggregation. Theoretical results and numerical simulations show the effectiveness of the proposed approach, which is currently being implemented in a real UMTS tesbed. © 2008 EUCA.

Admission control in UMTS networks based on approximate dynamic programming / Pietrabissa, Antonio. - In: EUROPEAN JOURNAL OF CONTROL. - ISSN 0947-3580. - 14:1(2008), pp. 62-75. [10.3166/ejc.14.62-75]

Admission control in UMTS networks based on approximate dynamic programming

PIETRABISSA, Antonio
2008

Abstract

This paper presents a Connection Admission Control (CAC) algorithm for Universal Mobile Telecommunications System (UMTS) networks based on an Approximate Dynamic Programming (ADP) Approach. To deal with the non-stationary environment due to the time-varying statistical characteristics of the offered traffic, the admission policy has to be computed periodically based on on-line measurements. If standard algorithms are used, the optimal policy computation is excessively time-consuming to be performed on-line. Thus, an ADP approach for the computation of a sub-optimal admission policy is proposed. The ADP approach is based (i) on the reduction of the policy space, and (ii) on an approximated state-space aggregation. Theoretical results and numerical simulations show the effectiveness of the proposed approach, which is currently being implemented in a real UMTS tesbed. © 2008 EUCA.
approximate dynamic programming (adp); connection admission control (cac); markov decision process (mdp); universal mobile telecommunications system (umts)
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Admission control in UMTS networks based on approximate dynamic programming / Pietrabissa, Antonio. - In: EUROPEAN JOURNAL OF CONTROL. - ISSN 0947-3580. - 14:1(2008), pp. 62-75. [10.3166/ejc.14.62-75]
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