Group Content Delivery via Broadcast Multicast Service Node Filtering
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Solution Overview
Problem
The current Group Message Delivery (GMD) function in MBMS does not support delivering messages to a specific group of UEs when the service announcement mode is set to 'SACH', resulting in messages being broadcasted to all UEs in the service area, including those not in the intended group.
Innovation Solution
A content provider node sends one or more group identifiers to a broadcast-multicast service node, which generates a group filter based on these identifiers and includes it in service announcement information sent to user equipment (UEs), ensuring that only intended UEs receive the group message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If service announcement mode is set to SACH and BM-SC broadcasts messages via MBMS, then message delivery coverage is improved, but message delivery accuracy deteriorates because all UEs in the service area receive the broadcast including those not in the intended group
Solution Approach 1:
The patent segments the broad MBMS service area into specific groups by introducing group identifiers (TAC, ECGI, PCI) that divide the service area into distinct group segments. Each UE can be identified as belonging to specific groups, allowing the system to segment the broadcast audience and deliver messages only to the intended group members rather than all UEs in the service area.
Solution Approach 2:
The patent applies local quality by assigning different group identification characteristics to different UEs or UE groups within the service area. Each group has specific local identifiers (TAC, ECGI, PCI combinations) that differentiate them from other groups, allowing the BM-SC to target specific local groups with messages while maintaining the broad MBMS broadcast capability.
2Measurement precision
If group filtering is implemented to deliver messages only to specific UEs, then message delivery accuracy is improved, but system complexity increases due to additional filtering mechanisms
Solution Approach 1:
The patent implements preliminary action by pre-configuring UEs with group identification information (TAC, ECGI, PCI) before message delivery. The BM-SC also pre-establishes the grouping structure and identifiers. When a message needs to be delivered, the filtering is already in place, and the BM-SC can directly use the pre-defined group identifiers to target the correct UEs without complex real-time filtering logic.
Solution Approach 2:
The patent introduces group identifiers (TAC, ECGI, PCI) as intermediaries between the BM-SC and UEs. Instead of implementing complex direct filtering between broadcast messages and individual UEs, the system uses these intermediary identifiers to match messages with target UEs. The identifiers act as a simple matching key that reduces the complexity of the filtering mechanism.
Data Source
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AI summary
Embodiments of the present disclosure provide methods and apparatus for group content delivery. A method in a communication network which comprises the content provider node and a broadcast-multicast service node, wherein the content provider node needs to deliver a message to a group of user equipments via the broadcast multicast service node. The method comprises obtaining one or more group identifiers. The method further comprises sending the one or more group identifiers to the broadcast-multicast service node.