Spiros Louvros

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This letter presents a two-layer cellular architecture which optimizes the handoff blocking probability performance of high-speed moving terminals (HSMT) in a congested urban area. The lower layer of the proposed architecture is based on a microcellular solution, for absorbing the traffic loads of both the low-speed moving terminals (LSMT) and the new calls(More)
Mobile Positioning is a great aspect in mobile cellular networks (GSM, UMTS etc) as it makes it possible to introduce a new class of applications based on the knowledge of the subscriber's position. Therefore, it can be quite useful for the support of multimedia streaming application's performance. Although several complicated techniques have been(More)
This paper proposes a semi-analytical medium access control (MAC) layer model for the macroscopic analysis of long term evolution (LTE) uplink. The model takes into consideration the expected number of retransmissions arising from channel disturbances and the number of allocated resources so that to satisfy a required packet delay budget. The former is(More)
Quality of service is obtained by introducing a threshold in the maximum waiting time of a handover call in the queue. In case the handover call mean service time at each queue position is found to be greater than this threshold, this call can not be serviced by this cell. This innovative idea introduces a more flexible traffic management since it enables a(More)
LTE cell planning requires special constraints in case of smart grid applications. Cell planners decide about the cell coverage mostly based on worst radio conditions (cell edge) acceptable level of minimum throughput, but not on delay constraints which are of extreme importance for smart grid solutions. In this paper a semi-analytical approach for uplink(More)
-In this paper the performance of radio resource allocation in GSM/GPRS network is analyzed. A two dimension Markov chain is presented using guard channels for handover calls. Also priority is given on reservation of QoS of voice service by applying priority for voice calls to pre-empt GPRS data packets. Key-Words: GSM, GPRS, Networks.