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Policy-based multivariate application-level QoS negotiation for multimedia services
| Details |
Inventors: Lumelsky, Leon L.; Manohar, Nelson R.; Wood, Stephen P.;
Assignee: International Business Machines Corporation (Armonk, NY)
Primary Examiner: Voeltz; Emanuel Todd
Assistant Examiner:
Attorney, Agent or Firm: Scully, Scott, Murphy & Presser, Cameron, Esq.; Douglas W.
A Resource Management Framework (RMF) comprises an extensible, distributed, policy-based, object-oriented system and method for resource discovery and negotiation during the setup and control of a media session between one or more media servers and end users. The scope of the RMF framework is the management of multimedia resources used during simple, non-interactive as well as composite, complex, interactive multimedia sessions. The RMF enables iterative negotiated mapping over the requirements of an RMF-compliant application onto the offerings of one or more RMF-compliant media servers. It is an open-services architecture providing the ability to insert and apply services to enhance the suitability of offerings to requirements and vice versa, during a negotiated mapping session. Moreover, the RMF negotiated mapping algorithm itself is customizable via the use of policies (herein referred to as per-flow policies). The policies used to drive management decisions and service selections during these negotiated mapping are `pluggable`. New or updated policies may be added, to augment or replace an existing policy so as to realize new behavior or refine existing behavior. |
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DETAILED DESCRIPTION It is an object of the invention to provide an extensible, distributed, policy-based, object-oriented framework for managing multimedia resources and providing resource discovery and negotiation during the setup and control of a media session between one or more media servers and end users regardless of the complexity of the multimedia session. It is a further object of the present invention to provide an extensible, distributed, policy-based, object-oriented framework that provides brokering functionality between media servers and applications in order to produce a free-form request specification [x[1], x[2], . . . , x[m]] comprised of both content requirements (e. g. , "the most recent headline news content from any major news outlet") as well as presentation requirements (e. g. , "where the content can be delivered with high quality and not exceeding total cost of more than $1) and that includes compliant media servers that provide offerings known to satisfy such a request specification. In addition to the objects stated above, it is another object of the present invention to provide an extensible, distributed, policy-based, object-oriented framework that provides an open systems architecture to enable web-like exploration of content provider repositories known to be compliant, and further that enables the building of browsers for searching multimedia content conditioned to constraints such as quality and cost. According to the principles of the invention, there is provided a Resource Management Framework ("RMF") that provides building blocks used to build a mapping system for negotiating multivariate application-level quality of service specifications across the offerings from one or more candidate servers. A brokering nucleus implements an iterative negotiated mapping process between user (i. e. , session) requirements and systems (i. e. , service, and resource) constraints. Particularly, the set of application constraints is negotiated against media servers and server offerings are obtained
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