Resource Management in Mobile Heterogeneous Networks: State of the Art and Challenges
نویسندگان
چکیده
Deployment of next-generation networks (i.e. 4G) begins to spread throughout the world. Today’s emerging multimedia application has many requirements in terms of quality of service and users always want to be best connected anywhere, anytime, and anyhow. To satisfy these demands, a variety of access technologies has become available: WiFi (Wireless Fidelity), WiMAX (Worldwide Interoperability for Microwave Access), and Cellular networks. This has made it difficult for service provider to select the best network for requesting services and to control the quality level of ongoing connections. Thus, the use of resources management to prevent overloaded or underutilized networks as well as to best satisfy users is indispensable. This report addresses the state of the art on radio resource management in next-generation networks. Recent schemes in network selection and bandwidth allocation are discussed in several aspects, namely decision making, QoS, mobility, and architectural design. Key-words: 4G networks, radio resource management, network selection, bandwidth allocation, mobility, quality of service, architectural design Note: This report has also been published as IRISA report no. PI-1889 ∗ [email protected] † [email protected] ‡ [email protected] § [email protected] in ria -0 02 58 50 7, v er si on 4 3 M ar 2 00 8 Gestion des ressources dans les réseaux mobiles hétérogènes: état de l’art et défis Résumé : Les réseaux de nouvelle génération (4G) commencent à se déployer dans le monde entier. Aujourd’hui, les nouvelles applications multimédia ont de nombreuses exigences en termes de qualité de service et les utilisateurs veulent être toujours mieux connectés n’importe où et à n’importe quel moment. Pour satisfaire ces exigences, une variété de technologies d’accès sont d’ores et déjà disponibles : le WiFi (Wireless Fidelity), le WiMAX (Worldwide Interoperability for Microwave Access), et les réseaux cellulaires. Le problème qui se pose alors aux fournisseurs d’accès à l’Internet mobile est celui de la sélection du meilleur réseau pour un service demandé et le contrôle de la qualité des connexions en cours. Ainsi, la gestion des ressources est indispensable afin d’éviter de surcharger ou de sous-utiliser tel ou tel réseau d’accès tout en satisfaisant au mieux les utilisateurs. Ce rapport décrit l’état de l’art sur la gestion des ressources radios dans les réseaux mobiles de nouvelle génération. Les mécanismes récents de sélection et d’allocation de bande passante sont examinés sous plusieurs aspects,à savoir ceux de la prise de décision, de la qualité de service, de la mobilité, et de l’architecture de contrôle. Mots-clés : réseaux mobiles, gestion des ressources, sélection de réseaux, allocation de bande passante, mobilité, qualité de service, système architecture in ria -0 02 58 50 7, v er si on 4 3 M ar 2 00 8 Resource Management in Mobile Heterogeneous Networks 3
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