Dynamic Packet Duplication Activation in 5G AMF
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Solution Overview
Problem
Current wireless systems face challenges in achieving high reliability and low latency due to limitations in redundant packet transmission, leading to increased signaling overhead and adaptation delays in response to dynamic network and radio conditions.
Innovation Solution
Implementing dynamic packet duplication activation and deactivation mechanisms based on traffic status and radio conditions, allowing for efficient use of network resources and improved service quality by configuring duplication at the Session Management Function (SMF) and access nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet duplication is activated for high reliability transmission, then packet transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent implements dynamic activation and deactivation of packet duplication based on real-time traffic status and radio conditions. The SMF receives indicators from the access node about channel quality and dynamically configures duplication activation/deactivation through N1/N2 signaling, allowing the system to adapt between reliability enhancement and signaling overhead reduction based on current network conditions.
Solution Approach 2:
The system changes the operational state parameter of packet duplication from static to dynamic. By monitoring radio conditions and traffic status, the SMF adjusts the duplication configuration parameter (activated/deactivated) to optimize the balance between transmission reliability and signaling overhead, enabling the system to switch between different operational modes based on environmental parameters.
2Reliability
If packet duplication is configured statically for reliability, then packet transmission reliability is improved, but configuration latency increases
Solution Approach 1:
The patent transitions from static to dynamic configuration of packet duplication. The SMF continuously monitors radio conditions and traffic status, and activates or deactivates duplication in real-time based on current needs, eliminating the delay associated with static pre-configuration while maintaining reliability when required.
Solution Approach 2:
The system establishes preliminary configurations at the SMF for both activated and deactivated states. When conditions change, the SMF can rapidly switch between pre-prepared configurations, reducing the latency that would otherwise be required to create new configuration parameters dynamically, thus balancing reliability with fast adaptation.
3Object-generated harmful factors
If packet duplication is deactivated to reduce signaling overhead, then signaling overhead is reduced, but packet transmission reliability decreases
Solution Approach 1:
The system dynamically changes the duplication configuration parameter based on monitored radio conditions and traffic status. When conditions indicate good channel quality and stable connectivity, the SMF deactivates duplication to reduce signaling overhead. When conditions deteriorate, the parameter is changed to activate duplication, thus adapting reliability to match current network conditions while minimizing overhead during stable periods.
Solution Approach 2:
The SMF periodically monitors radio conditions and traffic status to determine when to activate or deactivate packet duplication. This periodic assessment allows the system to maintain reliability during critical periods while reducing signaling overhead during stable periods, creating a rhythmic pattern of activation and deactivation that balances both requirements over time.
4Adaptability or versatility
If dynamic packet duplication management is implemented, then service quality is improved, but system complexity increases
Solution Approach 1:
The patent segments the packet duplication control function into distinct components: the SMF for centralized decision-making, the access node for local condition monitoring and indicator generation, and the UE for packet duplication execution. This segmentation allows each component to handle specific tasks, improving service quality through coordinated action while distributing system complexity across multiple entities rather than concentrating it in one location.
Solution Approach 2:
The SMF acts as an intermediary between the access node (which monitors radio conditions) and the UE (which executes packet duplication). The access node sends indicators to the SMF, which then makes configuration decisions and communicates them to the UE. This intermediary role enables sophisticated service quality management through centralized intelligence while keeping the UE implementation relatively simple, as the complex decision-making logic resides in the SMF.
Data Source
AI summary
An access and mobility management function (AMF) receives from a session management function (SMF) a first session configuration request message for a packet duplication of a first session between a user plane function (UPF) and a wireless device. The AMF receives from the SMF, based on traffic load information received at the SMF from the UPF, a first message for activation of a configuration of the packet duplication of the first session of the wireless device. The AMF sends to the SMF a second message indicating a result of the activation of the packet duplication of the first session.