35,922 research outputs found
Optimized IP-CANs to support best charged IMS scenarios
conference paper Published in Personal, Indoor and Mobile Radio Communications, 2009 IEEE 20th International Symposium by IEEE.The pricing and charging mechanisms used in Next
Generation Network (NGN) deployments will influence the profitability
of network operators. NGNs present an opportunity for
the success of service delivery platforms designed for IP multimedia
communications, like the IP Multimedia Subsystem (IMS).
Moreover, they present a platform for the delivery of a multitude
of applications and services to users with different expectations
and budgets. Although usage-based charging schemes are more
meaningful, some recent successful Internet-based applications
and services have attracted widespread usage due to enforcement
of flat-rate pricing. The choice of a pricing scheme often has
a one-to-one relation to the access network technology and the
quality of service guarantee. Flat-rate pricing may easily be
associated with best effort transport. This implies that some
users opt for services without QoS guarantee when favoured by
the pricing methodology. This paper explores scenarios where
services with different QoS requirements available to users with
varying pricing preferences can be provided over a set of IP
connection access networks (IP-CANs) of the IMS.We explore the
use of different pricing schemes for different IP-CANs of the IMS.
We perform testbed evaluations and present results depicting
the income patterns of networks enforcing different pricing and
charging schemes for VoIP and IPTV services. Moreover, we emphasize
the use of simplified pricing schemes on communication
networks.The pricing and charging mechanisms used in Next
Generation Network (NGN) deployments will influence the profitability
of network operators. NGNs present an opportunity for
the success of service delivery platforms designed for IP multimedia
communications, like the IP Multimedia Subsystem (IMS).
Moreover, they present a platform for the delivery of a multitude
of applications and services to users with different expectations
and budgets. Although usage-based charging schemes are more
meaningful, some recent successful Internet-based applications
and services have attracted widespread usage due to enforcement
of flat-rate pricing. The choice of a pricing scheme often has
a one-to-one relation to the access network technology and the
quality of service guarantee. Flat-rate pricing may easily be
associated with best effort transport. This implies that some
users opt for services without QoS guarantee when favoured by
the pricing methodology. This paper explores scenarios where
services with different QoS requirements available to users with
varying pricing preferences can be provided over a set of IP
connection access networks (IP-CANs) of the IMS.We explore the
use of different pricing schemes for different IP-CANs of the IMS.
We perform testbed evaluations and present results depicting
the income patterns of networks enforcing different pricing and
charging schemes for VoIP and IPTV services. Moreover, we emphasize
the use of simplified pricing schemes on communication
networks
Interworking QOS Management Subsystem into IMS-Based Architecture Multi Providers: IMS-IQMSMP
International audienceThe third-generation partnership project 3GPP and 3GPP2 have standardized the IP multimedia subsystem (IMS) to provide ubiquitous and access network-independent IP-based services for next-generation networks via merging cellular networks and the Internet. The IP Multimedia Subsystem (IMS) seems to be the technology that will prevail in Next Generation Networks (NGNs). The users wish to communicate through collections of networks using different protocols; rendering service mapping from one network to another with the similar QoS is a complex issue thereby. The heterogeneous networks are collections of communication platforms using different protocols. This heterogeneity implies the need to offer many different services on the market within short time. In this paper we propose a heterogeneous network model based on the IMS that provides guaranteed QoS. Our method presents, in the first, an informational solution. Decisional information is added to the HSS basis to enrich the knowledge base, which is expressed under the form of "profile of QoS R", where the new information informs directly the decisions to be taken according to the userâs profile (preferences QoS and pricing, bandwidth, location ...). In the second, a solution for multi providerâs context which can allow a subscriber to register with one or more operator(s) according to QoS offered. Thirdly, a mechanism which can be deployed in heterogeneous networks to preserve the original QoS values of the user session and thus eliminate the cumulative effect of QoS rounding across the entire communication path. And it is feasible via the âInterworking QoS Management Sub-networkâ while adding the new interworking management components, namely: SICs, DIC, QPA AS and HSS-PQoSr
Development of a building information modelling (BIM) migration path model for construction professionals
The construction professionals have the notion that by implementing Building
Information Modelling (BIM) in construction could overcome problems such as delay,
cost overrun, clashes in project design and undesirable quality in construction.
However, they failed to take the advantages of the BIM benefit as they are still trying
to find the best way to take on board the BIM into current practices. Most of the
professionals do not know âwhenâ and âhowâ to apply BIM throughout the construction
lifecycle. Several research models related to BIM has been developed to improve and
encourage BIM implementation. Nevertheless, the developed models have limitations
in highlighting the steps involved that could assist the construction professionals in
implementing BIM effectively in Malaysia. Therefore, this research is aimed to
develop a model that would be able to assist Malaysian construction professionals in
implementing BIM in a structured way. A semi-structured interview was carried out
with respondents that have various experienced and currently involved in BIM projects
in the Malaysian construction industry. Findings show that the construction
professionals are lacking in knowledge and experience in using BIM in various stages
of construction. Thus, they were unable to fully capitalise the benefit of 3D models.
Migration path model was proposed and evaluated as a strategic approach for BIM
implementation in the Malaysian construction industry. The identification of five (5)
activities (BIM Awareness, Develop BIM Strategy, Implement BIM, Monitor BIM
and Expand BIM Implementation) with the three (3) enablers (BIM work contract,
BIM work process and BIM technology) in the model is expected to be able to assist
construction professionals to implement BIM with the right BIM concept and later, the
benefit could be obtained for improving construction project. The proposed model
could be as a guideline for construction professionals in implementing BIM,
specifically in countries that new in BIM. The model is also expected to be able to fill
the gap in BIM implementation by supporting the initiatives by the Malaysian
government for increasing productivity in construction projects by using new
technology like BIM
Using Tuangou to reduce IP transit costs
A majority of ISPs (Internet Service Providers) support connectivity to the entire Internet by transiting their traffic via other providers. Although the transit prices per Mbps decline steadily, the overall transit costs of these ISPs remain high or even increase, due to the traffic growth. The discontent of the ISPs with the high transit costs has yielded notable innovations such as peering, content distribution networks, multicast, and peer-to-peer localization. While the above solutions tackle the problem by reducing the transit traffic, this paper explores a novel approach that reduces the transit costs without altering the traffic. In the proposed CIPT (Cooperative IP Transit), multiple ISPs cooperate to jointly purchase IP (Internet Protocol) transit in bulk. The aggregate transit costs decrease due to the economies-of-scale effect of typical subadditive pricing as well as burstable billing: not all ISPs transit their peak traffic during the same period. To distribute the aggregate savings among the CIPT partners, we propose Shapley-value sharing of the CIPT transit costs. Using public data about IP traffic of 264 ISPs and transit prices, we quantitatively evaluate CIPT and show that significant savings can be achieved, both in relative and absolute terms. We also discuss the organizational embodiment, relationship with transit providers, traffic confidentiality, and other aspects of CIPT
Monopoly quality degradation and regulation in cable television
Using an empirical framework based on the Mussa-Rosen model of monopoly quality choice, we calculate the degree of quality degradation in cable television markets and the impact of regulation on those choices. We find lower bounds of quality degradation ranging from 11 to 45 percent of offered service qualities. Furthermore, cable operators in markets with local regulatory oversight offer significantly higher quality, less degradation, and greater quality per dollar, despite higher prices
Is America Exporting Misguided Telecommunications Policy? The U.S.-Japan Telecom Trade Negotiations and Beyond
Global telecommunications markets have traditionally been closed to foreign trade and investment. Recent World Trade Organization negotiations resulted in a Basic Telecommunications agreement that sought to construct a multilateral framework to reverse that trend and begin opening telecom markets worldwide. Regrettably, this new WTO framework is quite ambiguous and open to pro-regulatory interpretations by member states. In fact, during recent bilateral trade negotiations with Japan, U.S. government officials adopted the position that the new framework allowed them to demand that the Japanese government adopt very specific regulatory provisions regarding telecom network interconnection and pricing policies. The Office of the U.S. Trade Representative argued that Japanese officials should require their domestic telecom providers to share their networks with rivals at a generously discounted price to encourage greater resale competition. Those interconnection and line-sharing rules were borrowed directly from the U.S. Telecommunications Act of 1996, a piece of legislation that remains the subject of intense debate within the United States. Good evidence now exists that those rules generally retard net-work investment and innovation by encouraging infrastructure sharing over facilities-based investment. Consequently, the USTR has generated resentment on the part of Japan and other trading partners as it has attempted to force them to adopt heavy-handed telecommunications mandates that have very little to do with legitimate free-trade policy. The USTR must discontinue efforts to impose American telecommunications regulations on other countries as part of free-trade negotiations and should instead focus on reforming or eliminating the most serious barriers to foreign direct investment both here and abroad
Auction-based Bandwidth Allocation Mechanisms for Wireless Future Internet
An important aspect of the Future Internet is the efficient utilization of
(wireless) network resources. In order for the - demanding in terms of QoS -
Future Internet services to be provided, the current trend is evolving towards
an "integrated" wireless network access model that enables users to enjoy
mobility, seamless access and high quality of service in an all-IP network on
an "Anytime, Anywhere" basis. The term "integrated" is used to denote that the
Future Internet wireless "last mile" is expected to comprise multiple
heterogeneous geographically coexisting wireless networks, each having
different capacity and coverage radius. The efficient management of the
wireless access network resources is crucial due to their scarcity that renders
wireless access a potential bottleneck for the provision of high quality
services. In this paper we propose an auction mechanism for allocating the
bandwidth of such a network so that efficiency is attained, i.e. social welfare
is maximized. In particular, we propose an incentive-compatible, efficient
auction-based mechanism of low computational complexity. We define a repeated
game to address user utilities and incentives issues. Subsequently, we extend
this mechanism so that it can also accommodate multicast sessions. We also
analyze the computational complexity and message overhead of the proposed
mechanism. We then show how user bids can be replaced from weights generated by
the network and transform the auction to a cooperative mechanism capable of
prioritizing certain classes of services and emulating DiffServ and time-of-day
pricing schemes. The theoretical analysis is complemented by simulations that
assess the proposed mechanisms properties and performance. We finally provide
some concluding remarks and directions for future research
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Enhancing IT investments productivity: Integrating network QOS and it indirect costs
Increasing productivity is considered one of the major driving factors for a successful business. From an Information Technology (IT) infrastructure perspective, obtaining an optimised performance of resources is expected to improve productivity. From a technical viewpoint, the introduction of Quality of Service (QoS) models have been perceived to optimise the performance of the organisation network backbone. These models aim to provide an acceptable level of service assurance to the newly introduced applications and services such as voice and video. From a management viewpoint, the proper management of IT investments indirect costs can lead to a reduction of the overall cost portfolio. Consequently, both benefits and productivity increase are likely to be realised. This paper introduces network QoS strategy within the hierarchy of business infrastructure. In addition, it aims to identify the relationship between network QoS and IT indirect costs. Such integration demonstrates how network QoS strategy can be used to control IT indirect costs as well as enhancing network performance
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