Inbound Roamer MBS Access Control via Service Announcements
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Solution Overview
Problem
Current mobile and wireless telecommunication systems, particularly in 5G networks, lack efficient mechanisms for roaming of multicast and broadcast services (MBS), which restricts inbound and outbound roamers' access to broadcast services based on home PLMN or service class subscriptions.
Innovation Solution
The proposed solution involves a method and apparatus that allow user equipment (UE) attached to a Public Land Mobile Network (PLMN) as an inbound roamer to receive service announcements indicating access permissions to broadcast sessions or service classes. The UE determines its access rights based on these announcements and transmits a multicast/broadcast service interest indication only if access is allowed, following the completion of a radio resource request.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If service announcements are transmitted to all user equipment in a PLMN, then inbound roamers can receive access permission information, but network signaling overhead and resource consumption increase
Solution Approach 1:
The patent applies local quality by differentiating the treatment of inbound roamers versus non-roamers. Service announcements containing access permission information are selectively transmitted only to inbound roamers based on their roamer status, rather than universally to all user equipment. This targeted approach ensures that only the specific group needing this information receives it, reducing overall network signaling overhead while maintaining complete information delivery to the intended recipients.
2Adaptability or versatility
If user equipment transmits multicast/broadcast service interest indication for all broadcast sessions, then service access can be requested, but network resource consumption and signaling traffic increase
Solution Approach 1:
The patent implements preliminary action by having user equipment determine access permissions in advance by receiving and processing service announcements before transmitting multicast/broadcast service interest indications. This preliminary determination of authorization status prevents unnecessary interest indication transmissions for services the UE is not permitted to access, thereby reducing signaling traffic while maintaining the flexibility to request access to authorized services.
3Reliability
If access control restrictions are enforced for inbound roamers, then network security and resource management improve, but service accessibility and user experience deteriorate
Solution Approach 1:
The patent applies dynamics by implementing flexible and configurable access control policies for inbound roamers rather than uniform restrictions. The system dynamically adjusts service accessibility based on PLMN-specific configurations, service class subscriptions, and individual roamer authorization status. This dynamic approach allows network operators to define granular policies that balance security requirements with service accessibility, enabling roamers to access permitted services without unnecessary restrictions while maintaining robust access control for unauthorized services.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for roaming of multicast MBS services. One method may include receiving, by a user equipment attached to a public land mobile network as an inbound roamer, a service announcement for a broadcast session or service class indicating whether inbound roamers are allowed to access the broadcast service or service class; determining, based on the service announcement, whether the user equipment is allowed to access a broadcast session or service class in the public land mobile network; and in response to determining that the user equipment is allowed to access a broadcast session or service class in the public land mobile network, transmitting, by the user equipment, a multicast/broadcast service interest indication associated with the broadcast session or service class upon completion of a radio resource request.