Réseau public mobile domestique

In the intricate web of mobile communication, the concepts of HPMN and VPMN play a pivotal role, especially in roaming scenarios. Let's delve into the depths of these terms, exploring their significance and implications in the realm of IoT.

Demystifying HPMN and VPMN 

HPMN, or Home Public Mobile Network, represents the native network of a mobile subscriber, where the subscriber holds a subscription. Conversely, VPMN, or Visited Public Mobile Network, denotes the network utilized by a subscriber while roaming outside the geographical coverage area of their HPMN. These networks form the backbone of mobile roaming, enabling seamless connectivity and service access across diverse geographical regions.

The Dynamics of Roaming Scenarios 

Roaming scenarios involve intricate interactions between HPMNs and VPMNs, shaping the flow of communication and financial transactions. Here's a breakdown of the key components involved:

• Originating Leg (OL): The initial segment of a call established between the subscriber and MSC1 within the HPMN.

• Roaming Leg (RL): The intermediary phase of the call journey, spanning from MSC1 in the HPMN to MSC2 in the VPMN, facilitating seamless roaming connectivity.

• Terminating Leg (TL): The final stretch of the call path, linking MSC2 in the VPMN to the roamer, ensuring the successful termination of the call.

Financial Implications of Roaming 

In roaming scenarios, financial transactions occur across multiple legs of the call journey, impacting both the subscriber and the roamer. Here's how the financial burden is distributed:

• Subscriber Charges: The subscriber originating the call within their HPMN incurs charges for the OL segment of the call.

• Roamer Charges: The roamer, situated in the VPMN, bears the financial responsibility for both the RL and TL segments of the call, reflecting the cost of utilizing the visited network's infrastructure.

Résumé

Le réseau mobile public domestique (HPMN) est le réseau d'un opérateur dans lequel un abonné mobile a un abonnement. Le HPMN est l'un des trois principaux acteurs qui assurent la médiation dans les scénarios d'itinérance. Un abonné peut utiliser à distance les services du réseau auquel il est abonné en y accédant par un autre réseau, appelé réseau mobile public visité (VPMN). Le réseau mobile public visité est le réseau utilisé par un abonné mobile lorsqu'il se déplace en dehors de son réseau mobile public d'origine (HPMN). 

Lorsqu'un abonné dans un HPMN appelle un roamer dans un VPMN, l'appel est établi en trois parties ou segments : Le segment d'origine (OL) entre l'abonné et MSC1, le segment d'itinérance (RL) entre MSC1 et MSC2 et le segment de terminaison (TL) entre MSC2 et le roamer. Dans ce scénario, l'abonné sera facturé pour l'OL, tandis que le roamer paiera pour le RL et le TL.

Le terme est utilisé en relation avec l'itinérance mobile, qui est la possibilité pour un client des communications mobiles de passer et de recevoir automatiquement des appels téléphoniques, d'envoyer et de recevoir des données ou d'accéder à d'autres services lorsqu'il voyage en dehors de la zone de couverture géographique du réseau domestique, en utilisant le réseau d'un autre opérateur.

FAQ

• What is the Home Public Mobile Network (HPMN), and how does it relate to mobile subscribers?

  HPMN refers to the primary network of a mobile subscriber, where the subscriber holds an active subscription. It serves as the native network for the subscriber, facilitating access to core mobile services within their designated geographical coverage area.

• How does the Visited Public Mobile Network (VPMN) differ from the Home Public Mobile Network (HPMN)?

  VPMN represents the network utilized by a mobile subscriber while roaming outside the coverage area of their HPMN. Unlike HPMN, which serves as the native network, VPMN provides temporary connectivity and service access to roaming subscribers.

• What role do Originating Leg (OL), Roaming Leg (RL), and Terminating Leg (TL) play in roaming scenarios?

  In roaming scenarios, a call journey consists of three distinct legs: OL, RL, and TL. OL signifies the segment between the subscriber and their home network's MSC, while RL spans the interconnection between the home and visited networks. Finally, TL encompasses the link between the visited network's MSC and the roamer, ensuring seamless call termination.

• How are financial charges distributed in roaming scenarios?

  Financial charges in roaming scenarios are distributed based on the specific segments of the call journey. The subscriber incurs charges for the originating leg (OL), while the roamer bears the financial responsibility for both the roaming leg (RL) and terminating leg (TL), reflecting the utilization of the visited network's infrastructure.