Mobile Broadcast/Multicast Network Operator

Description

The Mobile Broadcast/Multicast Network Operator (MBNO) is a logical and commercial role defined within the 3GPP service framework for Multimedia Broadcast Multicast Service (MBMS). It is not a specific network node or protocol, but rather an administrative entity responsible for providing broadcast and/or multicast services to end-users. The MBNO holds the business relationship with the end-user for the MBMS service and is responsible for the overall service provisioning, management, and potentially billing.

In terms of network architecture, the MBNO typically operates or controls the Broadcast Multicast-Service Center (BM-SC). The BM-SC is the entry point for content into the MBMS system, handling functions like service announcement, scheduling, content encryption (key management), and initiating MBMS bearer sessions. Therefore, the MBNO is the entity that decides what content is broadcast, when it is broadcast, and over which geographical areas (MBMS Service Areas). It interfaces with content providers or acts as one itself.

The MBNO may or may not own the underlying radio access and core network infrastructure. This leads to common operational models: a combined scenario where a Mobile Network Operator (MNO) also acts as the MBNO, using its own network; or a separate scenario where the MBNO is a service provider that leases capacity from one or more MNOs (who own the radio spectrum and infrastructure). In the separate scenario, the MBNO negotiates with the MNO(s) for the use of radio and transport resources to deliver its MBMS sessions to the targeted service area. The technical realization of this involves the MBNO's BM-SC connecting to the MNO's MBMS Gateway (MBMS-GW) and core network via standardized interfaces.

The concept of the MBNO is crucial for enabling a competitive and flexible ecosystem for broadcast/multicast services. It allows for specialized service providers (e.g., media companies) to offer mobile TV or large-scale software distribution without needing to be a full-fledged mobile operator. The 3GPP specifications, particularly in service requirements (TS 22.146), define the necessary capabilities and interfaces to support this separation of service provision from network operation, ensuring interoperability between the MBNO and one or more MNOs.

Purpose & Motivation

The MBNO role was defined to foster innovation and competition in the mobile broadcast and multicast service market. Prior to its formal definition, the assumption was often that only the traditional Mobile Network Operator (MNO) could offer such services, as they controlled the network infrastructure. This could limit the variety of available content and business models. The creation of the MBNO concept addressed this by decoupling the service provider role from the network operator role.

This separation solves several problems. It allows content specialists (e.g., broadcasters, media houses) to enter the mobile market without the massive capital expenditure required for a licensed spectrum and nationwide network deployment. It enables an MNO to generate wholesale revenue by selling broadcast network capacity to multiple MBNOs. Furthermore, it allows an MBNO to potentially aggregate audiences across multiple MNO networks, reaching a larger total user base than any single MNO could provide. This model was particularly important for making services like mobile TV economically viable, as it opened the door for partnerships between telecom operators and media companies.

Key Features

• Defines the commercial entity responsible for the MBMS service offering and user relationship
• Typically owns or operates the BM-SC network function
• Determines service content, scheduling, and target service areas
• May operate independently of the underlying radio access network owner (MNO)
• Enables wholesale business models for broadcast/multicast capacity
• Facilitates content provider entry into the mobile broadcast market

Evolution Across Releases

Defining Specifications