Descripción
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IP Multimedia Subsystem (IMS) is considered to provide multimedia services to users through an IP-based control plane. The current IMS service invocation mechanism, however, requires the Serving-Call Session Control Function (S-CSCF) invokes each Application Server (AS) sequentially to perform service subscription pro?le, which results in the heavy load of the S-CSCF and the long session set-up delay. To solve this issue, this paper proposes a linear chained service invocation mechanism to invoke each AS consecutively. By checking all the initial Filter Criteria (iFC) one-time and adding the addresses of all involved ASs to the ?Route? header, this new approach enables multiple services to be invoked as a linear chain during a session. We model the service invocation mechanisms through Jackson networks, which are validated through simulations. The analytic results verify that the linear chained service invocation mechanism can effectively reduce session set-up delay of the service layer and decrease the load level of the S-CSCF | |
Internacional
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Si |
JCR del ISI
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Si |
Título de la revista
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Computers & Electical Engineering. |
ISSN
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0045-7906 |
Factor de impacto JCR
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0,837 |
Información de impacto
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Volumen
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38 |
DOI
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10.1016/j.compeleceng.2012.03.010 |
Número de revista
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4 |
Desde la página
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840 |
Hasta la página
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852 |
Mes
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JULIO |
Ranking
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Q3 |