Multicast Service Tunnel Switching for 5G Mobility Continuity
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Solution Overview
Problem
Existing wireless communication systems face challenges in providing seamless continuity of multicast and broadcast services as user equipment moves between radio access network nodes, particularly in 5G systems, due to inefficiencies in managing unicast and multicast tunnels.
Innovation Solution
The implementation of techniques that allow for the dynamic switching between unicast and multicast tunnels based on flow establishment configuration information, including the use of unicast and multicast shared tunnels, and the addition of appropriate identifiers to user data packets, ensuring seamless service continuity for multicast and broadcast services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unicast tunnels are used for multicast and broadcast services, then service continuity is maintained, but network efficiency and resource utilization deteriorate
Solution Approach 1:
The patent implements dynamic tunnel selection that adapts between unicast and multicast modes based on real-time service requirements and user equipment movement states. The system dynamically switches tunnel types to optimize both service continuity and network efficiency, rather than statically using only unicast tunnels.
Solution Approach 2:
The patent changes the transmission mode parameter from fixed unicast to variable modes including unicast, multicast, and broadcast. By adjusting this parameter based on service type and user equipment state, the system achieves both reliable service continuity and improved network efficiency through appropriate mode selection.
2Loss of energy
If multicast shared tunnels are used for all devices, then network efficiency improves, but service reliability and continuity for moving devices deteriorate
Solution Approach 1:
The system dynamically adjusts tunnel selection based on user equipment movement detection. When devices are stationary, multicast shared tunnels provide network efficiency. When movement is detected, the system transitions to unicast tunnels to maintain service continuity, resolving the contradiction between efficiency and reliability.
Solution Approach 2:
The transmission mode parameter is changed from fixed multicast to a variable state that switches between multicast and unicast based on service requirements and device mobility. This parameter adaptation enables the system to achieve both network efficiency through multicast and service continuity through unicast when needed.
3Reliability
If seamless service continuity is ensured during device movement, then service reliability improves, but system complexity increases
Solution Approach 1:
The patent introduces a network side device as an intermediary that manages tunnel selection and switching. This intermediary handles the complexity of determining when to switch between unicast and multicast modes, absorbing the system complexity burden from the user equipment and centralizing the decision-making logic in the network infrastructure.
Solution Approach 2:
The system implements feedback mechanisms where the network side device monitors user equipment movement and service requirements, then adjusts tunnel selection accordingly. This feedback loop enables automatic adaptation to maintain service continuity while managing system complexity through intelligent control based on real-time conditions.
4Reliability
If dynamic switching between unicast and multicast tunnels is implemented, then network efficiency and service continuity both improve, but flow establishment complexity increases
Solution Approach 1:
The network side device acts as an intermediary that manages the complexity of flow establishment and tunnel switching. By centralizing this functionality in the network infrastructure rather than distributing it to user equipment, the system achieves dynamic tunnel switching benefits while managing flow establishment complexity in a controlled network environment.
Solution Approach 2:
The network side device is designed with multi-functionality, handling both unicast and multicast tunnel management, flow establishment, and switching decisions. This universal design consolidates multiple functions in a single entity, reducing overall system complexity while enabling dynamic tunnel switching for both unicast and multicast services.
Data Source
AI summary
Methods and systems for establishing multicast and broadcast services are described. In one example aspect, the method includes adding, upon determination that flow establishment configuration information does not include a multicast broadcast service (MBS) flow identifier, a first identifier to the user data of the data traffic flow, and transmitting the data traffic flows with the first identifier through the unicast tunnel, or adding, upon determination that the flow establishment configuration information includes the multicast broadcast service (MBS) flow identifier and the corresponding multicast shared tunnel, a second identifier to the user data of the data traffic flows, and transmitting the data traffic flows with the second identifier through the multicast shared tunnel.