Reconfiguration Techniques to Enhance Network Efficiency

Moessner, Klaus; Leaves, P.; Grandblaise, D.; Capar, Fatih; Mohyeldin, E.; Demestichas, Panagiotis; Dimitrakopoulos, George; Luo, Jesse; Tafazolli, Rahim

doi:10.1515/freq.2004.58.5-6.132

Cited by 2 publications

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“…In the Centralized Spectrum Management category, there is a need of a master entity, which controls the spectrum access and allocate spectrum dynamically (Dynamic Spectrum Allocation, DSA) according to the spectrum policy [9]. There are a number of examples which present the master entity.…”

Section: Ii1 Centralised Spectrum Liberationmentioning

confidence: 99%

Planning Future Heterogeneous Wireless Networks

Luo¹,

Huang²

2005

PIERS Online

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In this paper, based on the analyzed emerging challenges encountered by the future radio network, we focus on several candidate techniques targeting at a more spectrum-efficient and cost-effective solution. Among them, spectrum management is one special topic covering fields of technique, regulation and politics. We point out the high tendency of spectrum liberation in terms of spectrum allocation for services and radio technologies even between different network providers. In the network planning topic, we address a number of solutions w.r.t. some typical dominating factors. A solution reducing the risk of high expenditure in conjunction with the flexibility of spectrum management is also given. To further enhance the efficiency, advanced radio resource management allowing interworking among heterogeneous radio technologies is also presented.

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Section: Ii1 Centralised Spectrum Liberationmentioning

confidence: 99%

Planning Future Heterogeneous Wireless Networks

Luo¹,

Huang²

2005

PIERS Online

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“…Τέλος, σε ανάλογες κατευθύνσεις κινούνται και άλλες επιστημονικές εργασίες, με έμφαση μεταξύ άλλων στην ικανότητα επαναδιαμόρφωσης (reconfigurability) τερματικών συσκευών [42], στη διαχείριση κινητικότητας βασισμένη στις υπηρεσίες [43][44], σε σχήματα και μεθόδους επίλυσης του προβλήματος της (ανα)κατανομής της τηλεπικοινωνιακής κίνησης σε σύνθετες δικτυακές δομές [45], σε δικτυακές διαχειριστικές πλατφόρμες οι οποίες αντιμετωπίζουν το πρόβλημα επιλογής πρόσβασης του τερματικού [46]- [48] και στη βελτίωση παραμέτρων διαπομπής [49],…”

Section: σχετική έρευναunclassified

Τεχνικές Διαχείρισης Κινητικότητας Χρηστών Και Επιλογής Πρόσβασης Σε Ετερογενή Περιβάλλοντα Κινητών Επικοινωνιών

Κουντουράκης¹

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The evolution of wireless communications during the past years, has led to the heterogeneous network environments, where various access technologies, such as WLAN, UMTS, DVB-T, Bluetooth, etc., are simultaneously available to mobile devices. Correspondingly, mobile terminals appear with more than one wireless interfaces, thus they become able to interact with any available network. This increase of the alternatives, in combination with the variety of applications, raises an issue, not present in traditional wireless systems, the access network selection problem. The lack of uniformity of the different network characteristics (coverage, service capabilities and compatibilities, security, power consumption, bandwidth, delay, etc) makes them more or less suitable for a specific application, depending also on the service needs and the current network conditions. This PhD thesis presents an integrated approach, network based and terminal assisted, for the access selection issue and generally for the mobility management of the users in the context of a composite radio environment.Initially, a suitable management system for heterogeneous networks is adopted, in order to physically place the proposed functionalities. The general architecture is quite simple and distributed. The main operations are assigned to the gateway or access router of each subnet. In parallel, all access networks' particularities are maintained. The technologies considered are UMTS, WLAN and DVB-T, with UMTS to be the home network for the users.Afterwards, the access selection problem is delimited by defining all the input and output data, the restrictions and the triggering policy. It is also mathematically formulated and an appropriate algorithm is chosen and implemented for the discovery of the best solution. The calculation of this solution is based on the optimum usage of the network resources, assumed that a minimum quality of service is provided to the user. Moreover, all the messages, required for transferring the access selection data to and from the decision point, are designed on already existing protocols. The goal is to keep simplicity and operability. Furthermore, the selection of the appropriate protocols is justified by the examination of various candidates and the comparison with similar approaches.Finally, the benefits of the proposals of this thesis are validated by the execution of NS-2 simulations. Various scenarios are analyzed, especially covering cases of detecting and solving congestion situations.

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Reconfiguration Techniques to Enhance Network Efficiency

Cited by 2 publications

References 0 publications

Planning Future Heterogeneous Wireless Networks

Planning Future Heterogeneous Wireless Networks

Τεχνικές Διαχείρισης Κινητικότητας Χρηστών Και Επιλογής Πρόσβασης Σε Ετερογενή Περιβάλλοντα Κινητών Επικοινωνιών

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