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EnglishRecent advances in wireless client devices and multimedia communications have motivated relevant standardization efforts, such as the IP Multimedia System (IMS) to support session control, mobility, and interoperability in all-IP next generation networks. Notwithstanding the central relevance of IMS for novel mobile multimedia services, IMS-based solutions still exhibit limited support for service continuity during handoffs, by omitting ad-vanced techniques to reduce/eliminate handoff delays and quality degrada-tions, especially during vertical handoffs. We propose an original solution for service continuity and dynamic multimedia content tailoring based on the primary design guideline of exploiting terminal-based decentralized handoff predictions to proactively activate application-level management operations (flow quality downscaling). The proposal is fully compliant with standard IMS and exploits infrastructure media gateways to execute content tailoring actions, without requiring heavy client-side adaptation operations. The reported experimental results point out that our solution can avoid streaming playout interruptions and significantly increase user-perceived service quality, without negative effects on handoff delay.
| Titolo: | An IMS Vertical Handoff Solution to Dynamically Adapt Mobile Multimedia Services | |
| Autore/i: | BELLAVISTA, PAOLO; CORRADI, ANTONIO; FOSCHINI, LUCA | |
| Autore/i Unibo: | ||
| Anno: | 2008 | |
| Titolo del libro: | Proceedings of the 13th International Symposium on Computers and Communications (ISCC'08) | |
| Pagina iniziale: | 764 | |
| Pagina finale: | 771 | |
| Abstract: | Recent advances in wireless client devices and multimedia communications have motivated relevant standardization efforts, such as the IP Multimedia System (IMS) to support session control, mobility, and interoperability in all-IP next generation networks. Notwithstanding the central relevance of IMS for novel mobile multimedia services, IMS-based solutions still exhibit limited support for service continuity during handoffs, by omitting ad-vanced techniques to reduce/eliminate handoff delays and quality degrada-tions, especially during vertical handoffs. We propose an original solution for service continuity and dynamic multimedia content tailoring based on the primary design guideline of exploiting terminal-based decentralized handoff predictions to proactively activate application-level management operations (flow quality downscaling). The proposal is fully compliant with standard IMS and exploits infrastructure media gateways to execute content tailoring actions, without requiring heavy client-side adaptation operations. The reported experimental results point out that our solution can avoid streaming playout interruptions and significantly increase user-perceived service quality, without negative effects on handoff delay. | |
| Data prodotto definitivo in UGOV: | 22-gen-2009 | |
| Appare nelle tipologie: | 4.01 Contributo in Atti di convegno |
File in questo prodotto:
http://hdl.handle.net/11585/60559
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