Numerical investigation of a multiserver retrial model
Queueing Systems: Theory and Applications - Special issue of queueing systems, theory and applications
The Markov-modulated Poisson process (MMPP) cookbook
Performance Evaluation
The GSM System for Mobile Communications
The GSM System for Mobile Communications
GSM, GPRS and EDGE Performance: Evolution Toward 3G/UMTS
GSM, GPRS and EDGE Performance: Evolution Toward 3G/UMTS
Measurement-based replanning of cell capacities in GSM networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Analysis of a multi-server retrial queue with search of customers from the orbit
Performance Evaluation
LTE for UMTS - OFDMA and SC-FDMA Based Radio Access
LTE for UMTS - OFDMA and SC-FDMA Based Radio Access
PCS networks with correlated arrival process and retrial phenomenon
IEEE Transactions on Wireless Communications
Thinning schemes for call admission control in wireless networks
IEEE Transactions on Computers
Modeling of customer retrial phenomenon in cellular mobile networks
IEEE Journal on Selected Areas in Communications
Teletraffic performance of mobile radio networks with hierarchical cells and overflow
IEEE Journal on Selected Areas in Communications
A PCS network with correlated arrival process and splitted-rating channels
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Analysis of a cellular network with user redials and automatic handover retrials
NEW2AN'07 Proceedings of the 7th international conference on Next Generation Teletraffic and Wired/Wireless Advanced Networking
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GERAN (GSM-EDGE Radio Access Network) operators have traditionally used the Erlang B formula to estimate the number of signalling channels on a per-cell basis. Thus, it is assumed that the network behaves as a loss system with Poisson arrivals. However, the presence of automatic retrial mechanisms and correlated arrivals in these channels suggests that these assumptions might not be valid. This paper presents a performance analysis of the Stand-alone Dedicated Control CHannel in GERAN. Preliminary analysis shows that the Erlang B formula underestimates congestion and blocking on this channel. To address this issue, a queueing model with retrials and correlated arrivals is proposed, where correlation between arrivals is modelled by a simple Markov-Modulated Poisson Process. The proposed model can be tuned on a per-cell basis by statistics in the Network Management System. Model assessment is based on performance statistics from a live GERAN system. Results show that a simple retrial queueing model fails to explain blocking in cells with a large number of channels. These limitations are overcome by adding correlated arrivals in the retrial model.