Dynamic PDU Session Reselection for Adaptive Network Slicing
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Solution Overview
Problem
Wireless communication networks face interference issues due to increased demand for mobile broadband access, leading to degraded performance, especially in networks with diverse service level requirements, where existing network slicing methods lack flexibility in resource allocation and reselection.
Innovation Solution
Implementing dynamic network slicing resource reselection through a UE route selection policy (URSP) that allows for dynamic reselection of PDU sessions based on performance dimensions such as bandwidth, latency, power consumption, and economic factors, enabling flexible switching between current and new PDU session associations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If network slicing is implemented with static PDU session association, then network architecture complexity is reduced, but adaptability to diverse service level requirements deteriorates
Solution Approach 1:
The patent implements dynamic PDU session association where the UE can switch between different PDU sessions based on real-time service level requirements. The URSP policy is updated dynamically to reflect changing conditions, allowing the system to adapt to diverse service requirements without permanent architectural changes. This transforms the static association into a dynamic one that can respond to varying network conditions and service demands.
Solution Approach 2:
The patent changes the parameter of PDU session association from static to dynamic by introducing reselection mechanisms. The UE monitors service level requirements and automatically switches between PDU sessions based on matching criteria such as bandwidth, latency, and reliability requirements. This parameter change enables adaptability while maintaining manageable complexity through standardized procedures.
2Adaptability or versatility
If dynamic PDU session reselection is implemented, then resource allocation flexibility is improved, but control signal overhead increases
Solution Approach 1:
The patent implements a feedback mechanism where the UE monitors service level requirements and provides information to the network about its current PDU session performance and needs. The network uses this feedback to provide updated URSP policies that guide the UE's reselection decisions. This feedback loop enables flexible resource allocation while optimizing control signaling by only transmitting policies when changes are needed.
Solution Approach 2:
The patent enables the UE to autonomously perform PDU session reselection based on locally stored URSP policies and current service level requirements. The UE self-evaluates whether to switch sessions without requiring continuous network intervention, reducing control signal overhead. The network only needs to provide initial policies and occasional updates, rather than continuously managing each reselection decision.
3Reliability
If multiple PDU sessions are maintained for different applications, then service quality is improved, but device energy consumption increases
Solution Approach 1:
The patent applies local quality by associating different applications with PDU sessions that have specific quality characteristics matched to their requirements. Critical applications receive dedicated sessions with appropriate quality parameters, while less critical applications share sessions or use sessions with lower quality requirements. This selective approach maintains service quality where needed while reducing overall energy consumption by avoiding unnecessary high-quality session maintenance for all applications.
Solution Approach 2:
The patent implements partial action by maintaining multiple PDU sessions only when and where service quality requires it, rather than universally for all applications. The UE evaluates each application's needs and establishes or switches to multiple sessions only for applications that benefit from dedicated resources. This partial approach improves service quality for critical applications while minimizing the energy overhead associated with maintaining multiple sessions system-wide.
Data Source
AI summary
Systems and methods for providing dynamic network slicing resource reselection for wireless communication are described. User equipments (UEs) may determine that network slicing resources utilized with respect to one or more applications are to be changed in run time, such as for more efficient operation in light of a change in power mode, throughput mode, latency mode, etc. A message indicating a cause for reselection of a current packet data unit (PDU) session association with an application may be provided to a UE route selection policy (URSP) manager. The URSP manager may reevaluate a current PDU session association with the application to determine if it is a best match with the cause. If no, a switch to a new PDU session association with the application may be made. If yes, the current PDU session association with the application may be maintained Other aspects and features are also claimed and described.