Design, analysis and evaluation of dynamic spectrum allocation algorithms for quality of service provisioning in telemedicine applications based on the IEEE 802.22-2011 standard
The recent switch from analog to digital TV broadcast around the world has led to the development of communications standards that consider the use of TV White Spaces (TVWS). One of such standards is the IEEE 802.22 wireless regional área network (WRAN), which considers the use of TVWS to achieve be...
| Autor: | |
|---|---|
| Tipo de recurso: | tesis doctoral |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | México |
| Institución: | Centro de Investigación Científica y de Educación Superior de Ensenada |
| Repositorio: | Repositorio Institucional CICESE |
| Idioma: | inglés |
| OAI Identifier: | oai:cicese.repositorioinstitucional.mx:1007/2037 |
| Acceso en línea: | http://cicese.repositorioinstitucional.mx/jspui/handle/1007/2037 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Autor/Telemedicina, IEEE 802.22, QoS, Control de Admisión, Asignación Dinamica del Espectro, Algorítmos de Calendarización info:eu-repo/classification/Autor/WRAN, Telemedicine, IEEE 802.22, QoS, Admission Control, Dynamic Spectrum Allocation, Scheduling Algorithms info:eu-repo/classification/cti/7 info:eu-repo/classification/cti/33 info:eu-repo/classification/cti/3325 info:eu-repo/classification/cti/330793 |
| Sumario: | The recent switch from analog to digital TV broadcast around the world has led to the development of communications standards that consider the use of TV White Spaces (TVWS). One of such standards is the IEEE 802.22 wireless regional área network (WRAN), which considers the use of TVWS to achieve better propagation characteristics and longer transmission distances. Thus, this emerging technology presents an opportunity to provide connectivity and data based services from urban to rural areas. Some kind of services that could greatly benefit from the provision of data links between urban and rural áreas are those related to telemedicine and m-health. Nevertheless, provisioning of a certain quality of service (QoS) level is of Paramount importance to enable proper telemedicine service delivery from urban (e.g. an urban hospital) to rural locations (e.g. a rural clinic). In this context, QoS provisioning for telemedicine applications over Wireless networks present a major challenge to be addressed in order to fulfill the potential that rural Wireless telemedicine has to offer. In this thesis, a cross-layer approach combining Medium Access Control (MAC) and Application (APP) layers is presented, with the aim of reducing Blocking probability and interruption probability in telemedicine services operating over IEEE802.22/WRANs. At the APP layer, telemedicine traffic profiles based on utilization rates are defined. On the other hand, at the MAC layer a dynamic spectrum allocation mechanism based on a priority scheduling algorithm, and an Adaptive Bandwidth Management (ABM) mechanism are used to perform a QoS-based classification of telemedicine services and then dynamically allocating the bandwidth requirements. Three telemedicine services (i.e. tele-diagnosis, tele-consulting and tele-monitoring) with different bandwidth requirements and a special case of tele-consulting services that comprises different service levels (i.e. high-resolution teleconference, medium-resolution teleconference, and audio-only teleconference) are considered when evaluating the proposed approach performance. Simulation results demonstrate that the proposed approach is able to reduce blocking and interruption probabilities by using a priority scheduling algorithm for three telemedicine services, along with the ABM admission Control mechanism for special case of tele-consulting services. |
|---|