1,280 research outputs found
VIoT : Voice over Internet of Things
These days, the Internet of Things (IoT) is everywhere with a significantly increased number of devices connected to the Internet. Besides, we have also witnessed the broad adoption of the Internet telephony technologies in the last decade. In this regard, this paper investigates the integration of these two domains in order to enable voice and telephony services in IoT, resulting in a new paradigm that we named Voice over IoT (VIoT). To do so, a novel, efficient and low-cost integration architecture is introduced in order to connect IoT devices with voice capabilities to the Voice over Internet Protocol (VoIP) ecosystem and to enable people to interact with them. Also, a validation and evaluation study is presented in order to show the applicability of the proposed system for VIoT applications in industrial and consumer domains
Future Open Mobile Services
The major barriers for the success of mobile data services are the lack of comprehensible mobile service architectures, their confusing business models and the complexity combined with the inconsistency of the technology enablers. This paper attempts to present a more structured and comprehensive analysis of the current mobile service architectures and their technology enablers. The paper starts with a thorough study of the evolution of mobile services and their business models, and a collection of expectations of the different actors, including the end-user. Next, starting from the original mobile services architecture and environment, an attempt to place the different technology enablers in relation to each other and in relation to their position in the mobile system, will be carried out. Each technology enabler together with their contribution in the enhancement of mobile services are then summarised in a complete and comprehensive way. The paper concludes with a recapitulation of the achievement of the state-of-the-art technology enablers and an identification of future improvements
Unified Messaging using SIP and RTSP
Traditional answering machines and voice mail services are closed systems, tightly coupled to a single end system,the local PBX or local exchange carrier. Even simple services, such as forwarding voice mail to another user outside the local system, are hard to provide. With the advent of Internet telephony, we need to provide voice and video mail services. This also offers the opportunity to address some of the shortcomings of existing voice mail systems. We list general requirements for a multimedia mail system for Internet telephony. We then propose an architecture using SIP (Session Initiation Protocol) and RTSP (Real-Time Streaming Protocol) and compare various alternative approaches to solving call forwarding, reclaiming and retrieval of messages. We also briefly describe our prototype implementation
A unified data repository for rich communication services
Rich Communication Services (RCS) is a framework that defines a set of IP-based services for the delivery of multimedia communications to mobile network subscribers. The framework unifies a set of pre-existing communication services under a single name, and permits network operators to re-use investments in existing network infrastructure, especially the IP Multimedia Subsystem (IMS), which is a core part of a mobile network and also acts as a docking station for RCS services. RCS generates and utilises disparate subscriber data sets during execution, however, it lacks a harmonised repository for the management of such data sets, thus making it difficult to obtain a unified view of heterogeneous subscriber data. This thesis proposes the creation of a unified data repository for RCS which is based on the User Data Convergence (UDC) standard. The standard was proposed by the 3rd Generation Partnership Project (3GPP), a major telecommunications standardisation group. UDC provides an approach for consolidating subscriber data into a single logical repository without adversely affecting existing network infrastructure, such as the IMS. Thus, this thesis details the design and development of a prototypical implementation of a unified repository, named Converged Subscriber Data Repository (CSDR). It adopts a polyglot persistence model for the underlying data store and exposes heterogeneous data through the Open Data Protocol (OData), which is a candidate implementation of the Ud interface defined in the UDC architecture. With the introduction of polyglot persistence, multiple data stores can be used within the CSDR and disparate network data sources can access heterogeneous data sets using OData as a standard communications protocol. As the CSDR persistence model becomes more complex due to the inclusion of more storage technologies, polyglot persistence ensures a consistent conceptual view of these data sets through OData. Importantly, the CSDR prototype was integrated into a popular open-source implementation of the core part of an IMS network known as the Open IMS Core. The successful integration of the prototype demonstrates its ability to manage and expose a consolidated view of heterogeneous subscriber data, which are generated and used by different RCS services deployed within IMS
Aplicabilidad de telefonía IP en la computación en la nube
This paper carries out a research related to the applicability of VoIP over Cloud Computing to guarantee service stability and elasticity of the organizations. In this paper, Elastix is used as an open source software that allows the management and control of a Private Branch Exchange (PBX); and for developing, it is used the services given Amazon Web Services due to their leadership and experience in cloud computing providing security, scalability, backup service and feasibility for the users.Este trabajo lleva a cabo una investigación relacionada con la aplicabilidad de VoIP sobre Cloud Computing para garantizar la estabilidad del servicio y la elasticidad de las organizaciones. En este documento, Elastix se utiliza como un software de código abierto que permite gestión y control de una central telefónica privada (PBX); y para el desarrollo, se utilizan los servicios prestados a Amazon Web Services debido a su liderazgo y experiencia en computación en la nube que brinda seguridad, escalabilidad y servicio de respaldo y viabilidad para los usuarios
A Model for Emergency Service of VoIP Through Certification and Labeling
Voice over Internet Protocol (VoIP) will transform many aspects of
traditional telephony service including technology, the business models
and the regulatory constructs that govern such service. This
transformation is generating a host of technical, business, social and
policy problems. The Federal Communications Commission (FCC) could
attempt to mandate obligations or specific solutions to the policy
issues around VoIP, but is instead looking first to industry initiatives
focused on key functionality that users have come to expect of
telecommunications services. High among these desired functionalities is
access to emergency services that allow a user to summon fire, medical
or law enforcement agencies. Such services were traditionally required
(and subsequently implemented) through state and federal regulations.
Reproducing emergency services in the VoIP space has proven to be a
considerable task, if for no other reason then the wide and diverse
variety of VoIP implementations and implementers. Regardless of this
difficulty, emergency service capability is a critical social concern,
making it is particularly important for the industry to propose viable
solutions for promoting VoIP emergency services before regulators are
compelled to mandate a solution, an outcome that often suffers
compromises both through demands on expertise that may be better
represented in industry and through the mechanisms of political
influence and regulatory capture. While technical and business
communities have, in fact, made considerable progress in this area,
significant uncertainty and deployment problems still exist. The
question we ask is: can an industry based certification and labeling
process credibly address social and policy expectations regarding
emergency services and VoIP, thus avoiding the need for government
regulation at this critical time?1 We hypothesize that it can. To
establish this, we developed just such a model for VoIP emergency
service compliance through industry certification and device labeling.
The intent of this model is to support a wide range of emergency service
implementations while providing the user some validation that the
service will operate as anticipated. To do this we first examine
possible technical implementations for emergency services for VoIP.
Next, we summarize the theory of certification as self-regulation and
examine several relevant examples. Finally, we synthesize a specific
model for certification of VoIP emergency services. We believe that the
model we describe provides both short term and long-term opportunities.
In the short term, an industry driven effort to solve the important
current problem of emergency services in VoIP, if properly structured
and overseen as we suggest, should be both effective and efficient. In
the long term, such a process can serve as a model for the application
of self-regulation to social policy goals in telecommunications, an
attractive tool to have as telecommunications becomes increasingly
diverse and heterogeneous
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