5G Multicast Delivery Mode Switching Using RAN-Aware Triggers
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Solution Overview
Problem
Existing methods for switching between unicast and multicast/broadcast delivery modes in 5G networks are inefficient due to application layer control signaling, slow reaction times, and lack of non-access stratum (NAS) signaling, which do not utilize RAN conditions and device location information effectively.
Innovation Solution
Implement a system that determines triggering events at the user device, network device, or content provider system to switch between unicast, multicast, and broadcast messaging based on RAN conditions and device location, using control plane and user plane procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If application layer control signaling (MooD) is used for delivery mode switching, then delivery mode switching is enabled, but control signaling efficiency deteriorates and reaction time increases
Solution Approach 1:
The patent introduces an intermediary mechanism by moving the delivery mode switching decision from the application layer to the network layer (specifically the Access and Mobility Management Function). This intermediary position enables faster reaction to network conditions while maintaining the ability to support multiple applications, thus resolving the contradiction between adaptability and reaction time.
Solution Approach 2:
The patent replaces the application layer signaling mechanism with a network layer signaling mechanism (NAS signaling). This substitution enables the system to leverage network-wide information and faster signaling paths, thereby reducing reaction time while preserving delivery mode switching capability.
2Adaptability or versatility
If application layer control signaling (MooD) is used for delivery mode switching, then delivery mode switching is enabled, but signaling efficiency deteriorates
Solution Approach 1:
By positioning the switching decision at the network layer rather than application layer, the patent creates an intermediary that can serve multiple applications simultaneously. This eliminates the need for each application to implement and maintain its own MooD protocol, thereby improving signaling efficiency while preserving delivery mode switching capability.
Solution Approach 2:
The network layer mechanism provides a universal solution that serves multiple applications and services. Instead of requiring each application to support the MooD protocol individually, the network layer implementation provides a multi-functional solution that improves overall signaling efficiency.
3Adaptability or versatility
If application layer control signaling (MooD) is used for delivery mode switching, then delivery mode switching is enabled, but protocol complexity increases
Solution Approach 1:
The patent introduces an intermediary at the network layer that handles the complexity of delivery mode switching. This intermediary absorbs the protocol complexity, eliminating the need for application layer implementations to support MooD. Applications can remain simple while the network layer handles the sophisticated switching logic.
Solution Approach 2:
The network layer mechanism provides self-service by automatically managing delivery mode switching based on network conditions. This eliminates the need for application layer entities to implement complex MooD protocols, thereby reducing device complexity while maintaining delivery mode switching capability.
4Adaptability or versatility
If application layer control signaling (MooD) is used for delivery mode switching, then delivery mode switching is enabled, but resource usage optimization deteriorates
Solution Approach 1:
By positioning the switching decision at the network layer, the patent creates an intermediary that has access to network-wide resource information. This enables more informed switching decisions that optimize resource usage, as the network layer can evaluate overall network conditions rather than just application-specific metrics.
Solution Approach 2:
The network layer mechanism enables feedback loops that monitor network resource usage and adjust delivery mode switching accordingly. This feedback capability allows the system to optimize resource usage dynamically, responding to changing network conditions in real-time, thereby improving resource efficiency while maintaining delivery mode switching capability.
Data Source
AI summary
An overall architecture to integrate multicast and broadcast service into a general 5G core network. The architecture may provide methods and systems to switch the delivery mode of transmitting messages to User Equipment (UE)s from a unicast mode to a multicast mode. The method includes triggering events at UE, network functions, content provider or RAN node to initiate the switch process; a procedure for UE initiated switch from unicast to multicast; a procedure for network-initiated switch from unicast mode to multicast mode; and a procedure for RAN initiated switch from unicast mode to multicast mode. The architecture may also provide methods to switch the delivery mode from multicast mode to unicast mode. These methods may include triggering events at UE, network functions, content provider or RAN node to initiate the switch process; a procedure for UE initiated switch from multicast mode to unicast mode; a procedure for network-initiated switch from multicast mode to unicast mode; and a procedure for RAN initiated switch from multicast mode to unicast mode.