Red Móvil Pública Doméstica

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.

Resumen

La Red Pública Móvil Doméstica (HPMN) es la red de un operador en la que un abonado móvil está abonado. La HPMN es uno de los tres actores principales que median en los escenarios de itinerancia. Un abonado puede utilizar a distancia los servicios de la red suscrita accediendo a ella a través de una red diferente, denominada red móvil pública visitada (VPMN). La red móvil pública visitada es la red que utiliza un abonado móvil en itinerancia fuera de su red móvil pública de origen (HPMN). 

Cuando un abonado en una HPMN llama a un roamer en una VPMN, la llamada se establece en tres partes o tramos: Tramo de origen (OL) entre el abonado y el MSC1, tramo de itinerancia (RL) entre el MSC1 y el MSC2 y tramo de terminación (TL) entre el MSC2 y el roamer. En este caso, el abonado pagará por el OL, mientras que el roamer pagará por el RL y el TL.

El término se utiliza en relación con la itinerancia móvil, que es la capacidad de un cliente de comunicaciones móviles de realizar y recibir automáticamente llamadas telefónicas, enviar y recibir datos o acceder a otros servicios mientras se desplaza fuera del área de cobertura geográfica de la red de origen, mediante el uso de una red de otro operador.

Preguntas frecuentes

• 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.