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Internet of Things (IoT) encompasses large number of devices interconnected through internet to provide wide range of services covering industrial and commercial applications. Heterogeneous, sporadic communication demands from IoT devices make it difficult to satisfy the dynamic Quality of Service (QoS) requirements of the service centric IoT. Understanding the nature of traffic for IoT networks is...
This paper investigates a new analytical model of a cell supporting adaptive traffic. A dynamic channel allocation scheme based on predefined bandwidth threshold values, which takes into account the signal power of incoming calls, is presented. A threshold value is set to limit the number of new connections to reduce the handoff dropping probability. Formula for performance characteristics e.g. blocking...
In this paper, we propose an adaptive Call Admission Control for IEEE 802.16 scheduled flows. As the WiMAX defined services aim to adapt the bandwidth grant to the data rate of accepted sessions, a powerful CAC that takes into account flows characteristics and their heterogeneities must be used. Our proposal aims to take advantage of the variability of traffics and to adapt the CAC according to the...
Worldwide interoperability for microwave access (WiMAX) based wireless metropolitan area networks have recently received wide attention as they support high data rates with great quality of service (QoS) capabilities. In order to support QoS, bandwidth request (BW-REQ) mechanisms are suggested in the WiMAX standard for resource reservation. In this letter we propose a simple and accurate analytical...
This paper proposes a model for call admission control in the next generation wireless networks. It presents a prioritized call admission procedure using the combination of buffer and guard channel schemes applicable to the heterogeneous networks in general and wireless overlay network (WON) in particular call admission priority is given to the real time calls over the non-real time calls which are...
In this paper, we present a simple two-class QoS model for random access systems. We provide a practical mechanism for categorizing the available resources into two distinct service classes prior to medium access. We use an a Markov chain model to define the states and transitions, and derive the system access success probability. This provides a mathematical basis for an accurate model that can be...
This paper presents the analysis and estimation of effective bandwidth of a router, handling multi-class traffic. Analysis is done with marginal buffering as well as large buffers. Performance of a periodic on-off source is compared with that of a Poisson??s source with marginal buffering. Bandwidth requirement of the sources for a given Quality of Service is worked out. The analysis is then extended...
A mathematical model for analytical study of complete and partial channel allocation schemes is presented in this research paper. Expression for the queue length distribution has been analytically derived. The mathematical model can be used for analysis of multiple call categories like new calls, handoff calls, delay tolerant or delay sensitive calls. This adaptive mathematical model can be utilized...
In this paper, we study bandwidth management of a wireless/optical based access/metro network in support of voice and data services. For voice services, we use a finite state Markov Chain to estimate the blocking probability of voice circuits over an Adaptive modulation and coding wireless channel, as a function of the channel parameters. For data services, we evaluate a rate matching and a buffer...
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