Equalization of congestion probabilities in a W-CDMA cell supporting calls of finite sources with interference cancellation

Moscholios, Ioannis D.; Katsiva, M. A.; Kallos, G.A.; Logothetis, Michael D.

doi:10.1109/csndsp.2014.6923801

Cited by 9 publications

(20 citation statements)

References 23 publications

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“…In order to effectively manage the traffic distribution in network nodes, it is then necessary to introduce some additional traffic management mechanism in output links of the switching network. One of the most effective access management mechanisms is resource reservation [30][31][32][33] which, with appropriately done parametrization of the node, can lead to some privileged status of a number of selected traffic streams, for example, real time streams. This mechanism is based on controlling the admission of new calls to the system in relation to the current state of the load.…”

Section: Introductionmentioning

confidence: 99%

“…All occupancy states "higher" than the reservation threshold belong to the so-called reservation space in which calls of a given class will be blocked. The operation and analysis of the reservation mechanism have been widely addressed in the literature of the subject, for example, in [31][32][33][34][35][36]. A possibility of the application of reservation mechanisms in shaping traffic service characteristics in switching networks and structuring mutual dependencies between the levels of blocking of individual call classes at output links of switching networks has been analysed in many works, for example, in [34,37].…”

Section: Introductionmentioning

confidence: 99%

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Multiservice Switching Networks with Overflow Links and Resource Reservation

Głąbowski

Stasiak

2016

Mathematical Problems in Engineering

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This paper proposes a new analytical model of a multiservice switching network with overflow links in the first stage and resource reservation for selected call classes in output directions. The proposed model assumes that both the overflow mechanism and the resource reservation mechanism can be used in a number of selected, or all, classes of calls. A particular attention is given to the way the effective availability parameter for networks with overflow links in the point-to-point selection mode is determined. The proposed model makes it possible to determine dependencies between the internal blocking probability, capacity of overflow links, and the number of reserved resources for call classes to be analysed. Simulation experiments confirm high accuracy of the proposed method and potential applications of the model in engineering issues.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiservice Switching Networks with Overflow Links and Resource Reservation

Głąbowski

Stasiak

2016

Mathematical Problems in Engineering

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“…In [7], [9] and [13], calls follow a Poisson process, while the models of [6], [10] cover Poisson, Bernoulli and Pascal traffic, based on the model of [16]. In [8], [11] and [12] calls come from a finite number of users. Apart from the different arrival processes considered in [6]- [13], these models also differ in the modelling of local blocking; e.g., the modelling approach of [6], [10] is more complicated compared to [7], as it is shown in [11].…”

Section: Introductionmentioning

confidence: 99%

“…In [8], [11] and [12] calls come from a finite number of users. Apart from the different arrival processes considered in [6]- [13], these models also differ in the modelling of local blocking; e.g., the modelling approach of [6], [10] is more complicated compared to [7], as it is shown in [11]. Therefore, herein, we adopt the model of [7] for the local blocking.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of CDMA-based networks with interference cancellation, for batched Poisson traffic under the bandwidth reservation policy

Moscholios

Kallos

Logothetis

2015

2015 13th International Conference on Telecommunications (ConTEL)

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CDMA-based technologies deserve assiduous analysis and evaluation. We study the performance, at call-level, of a CDMA cell with interference cancellation capabilities, while assuming that the cell accommodates different service-classes of batched Poisson arriving calls. The partial batch blocking discipline is applied for Call Admission Control (CAC). To guarantee certain Quality of Service (QoS) for each service-class, the Bandwidth Reservation (BR) policy is incorporated in the CAC; i.e., a fraction of system resources is reserved for highspeed service-classes. We propose a new multirate loss model for the calculation of time and call congestion probabilities. The notion of local (soft) and hard blocking, users activity, interference cancellation, as well as the BR policy, are incorporated in the model. Although the steady state probabilities of the system do not have a product form solution, time and call congestion probabilities can be efficiently determined via approximate but recursive formulas. Simulation verified the high accuracy of the new formulas. We also show the consistency of the proposed model in respect of its parameters, while comparison of the proposed model with that of Poisson input shows its necessity.

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“…The system has been modeled as a CTMC and a recurrent formula for calculation of system state probabilities has been derived. The model of [5] has been extended in [8] to incorporate elastic services and in [9], [10] to enable interference cancellation. In [11], the blocking performance in the downlink of CDMA is analysed, based on Markov chain modelling.…”

Section: Introductionmentioning

confidence: 99%

Handoff modeling in cellular CDMA with finite sources and state-dependent bandwidth requirements

Moscholios

Vardakas

Logothetis

2014

2014 IEEE 19th International Workshop on Computer Aided Modeling and Design of Communication Links and Networks (CAMAD)

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It is envisioned that small cells are going to play an important role in future cellular networks. Due to limited coverage areas of small cells and increased user mobility, a proper analysis and evaluation of handoff traffic is of major importance. In this paper, we propose a novel teletraffic model for the analysis of handoff traffic in cellular CDMA networks. When the cell load is above a predefined threshold, we allow the handoff calls to reduce their bandwidth requirements in order to avoid blocking. Our model also realistically assumes a finite number of traffic sources in the cell and enables analytical determination of uplink blocking probabilities for new and handoff calls. To this end, the CDMA system has been described as a continuous-time Markov chain in order to derive an efficient recursive formula for the calculation of system state probabilities. The proposed analytical model has been validated through simulation experiments, which show good accuracy of the derived results.

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Equalization of congestion probabilities in a W-CDMA cell supporting calls of finite sources with interference cancellation

Cited by 9 publications

References 23 publications

Multiservice Switching Networks with Overflow Links and Resource Reservation

Multiservice Switching Networks with Overflow Links and Resource Reservation

Performance analysis of CDMA-based networks with interference cancellation, for batched Poisson traffic under the bandwidth reservation policy

Handoff modeling in cellular CDMA with finite sources and state-dependent bandwidth requirements

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