Number Portability in the Global Switched Telephone Network (GSTN): An Overview

Foster, Mary K.; McGarry, Tom; Yu, James

doi:10.17487/rfc3482

Cited by 14 publications

(9 citation statements)

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“…Therefore, telephony networks must be enhanced in order to comply with NP, adapting its signaling and routing mechanisms. Furthermore, NP also requires changes in phone numbers administration, billing and service management [1].…”

Section: A Number Portabilitymentioning

confidence: 99%

A Turbo Coding Scheme for the 2-User Gaussian Adder Channe

Alcoforado¹,

Lima²

2010

Anais De VII International Telecommunications Symposium

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Number portability (NP) is an important requirement present in most telephony networks. Typically, NP is regulated by local legislation and is inherently against the very nature of routing in circuit-switched networks, which can complicate its deployment. The technological move towards IP-based networks demands treatment of legacy numbers portability, so as to enable interoperability among technologies and allowing progressive substitution of old networks. This paper aims at presenting an application serverbased approach for NP aimed at NGN networks, especially IMS. A test implementation is presented, along with a discussion of currently used approaches, as well as of the one here proposed. Test results validate the approach and show good overall performance.

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Section: A Number Portabilitymentioning

confidence: 99%

A Turbo Coding Scheme for the 2-User Gaussian Adder Channe

Alcoforado¹,

Lima²

2010

Anais De VII International Telecommunications Symposium

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“…A key assumption, in this regard, is that "all call query," a method by which a number portability query is performed on all originating calls as described in [8], is used as the service portability implementation option. Figure 8 illustrates the signaling peering process for a basic voice call initiated with an E.164 number, which we describe as follows:…”

Section: Proposed Signaling Peering Processmentioning

confidence: 99%

IMS network signaling peering: Challenges and proposal

Joseph¹

2008

Bell Labs Tech. J.

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IP Multimedia Subsystem (IMS) network peering is a key enabler that willvoice, IMS networks essentially rely on the PSTN to route voice calls among the IMS islands. That is, calls among IMS subscribers served by different SPs are most likely routed through the PSTN, resulting in less efficient routing, an inability to support end-to-end VoIP related services (e.g., wideband voice), unnecessary settlements, and the undesirable impact of perpetuating the PSTN.Various standards organizations have recently begun to tackle crucial aspects of IMS peering, including policy, signaling, network, and security peering. The International Telecommunication Union,

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“…For terminating calls this can be accomplished by using number portability (several approaches are described in [11]), CAMEL/IN triggers, or by issuing new numbers homed to the DMS system. For originating calls, CAMEL/IN triggers are required.…”

Section: Efficiency Of Circuit Voice Routingmentioning

confidence: 99%