ATSSS Trigger Using Power Headroom for Power-Limited UEs
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Solution Overview
Problem
Conventional ATSSS policies in 5G networks do not consider power limitations of devices, leading to continued traffic steering through power-consuming accesses, which affects device performance when in a power-limited state.
Innovation Solution
A method and system where a base station receives a power headroom report from a user equipment (UE) to determine its power headroom, and based on this, transmits appropriate ATSSS policy updates to the core network to adjust traffic steering and splitting strategies, prioritizing non-3GPP access when the UE is power limited.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ATSSS policies are used to distribute traffic across 3GPP and non-3GPP accesses, then traffic distribution is optimized based on network availability and QoS requirements, but device power consumption increases when the device is in a power-limited state
Solution Approach 1:
The ATSSS policy is made dynamic by introducing power headroom as a variable parameter. The base station monitors PHR values and adjusts traffic steering decisions in real-time based on the device's power state, transitioning between different policy configurations depending on whether the device is in power-limited or non-power-limited mode
Solution Approach 2:
The system changes the operational parameters of traffic steering by introducing power headroom thresholds. When PHR falls below a threshold indicating power-limited state, the system modifies traffic distribution parameters to prioritize non-3GPP access, thereby reducing overall power consumption while maintaining acceptable QoS
2Productivity
If conventional ATSSS policies continue to steer traffic through power-consuming accesses without considering power limitations, then network throughput is maintained, but device performance deteriorates in power-limited state
Solution Approach 1:
A feedback mechanism is established where the device reports its power headroom status to the base station, which then adjusts ATSSS policy accordingly. This closed-loop system ensures that traffic steering decisions are aligned with the device's actual power capabilities, preventing performance deterioration while maintaining network throughput through intelligent routing
3Use of energy by moving object
If the base station monitors power headroom and triggers ATSSS policy updates based on PHR, then power-aware traffic management is achieved, but system complexity increases
Solution Approach 1:
The device autonomously monitors its own power headroom and self-reports status changes to the base station using standardized PHR mechanisms. This self-service approach allows the system to achieve power-aware traffic management without requiring complex centralized monitoring infrastructure, as each device manages its own power state information
Data Source
AI summary
Various systems, apparatuses, and methods for dynamically adapting one or more access traffic steering, switching, and splitting (ATSSS) policies based on a power headroom (PHR) of a user equipment (UE) are provided. A method performed by a base station is provided. The base station receives the PHR from the UE. The base station determines a power headroom of the UE based on the received PHR. When the determined power headroom falls below a threshold power headroom for a predefined duration, the base station determines that the UE enters a power-limited state. The base station transmits, to a core network (CN), a first indication that the UE is in the power-limited state. After transmitting the first indication, the base station receives a first set of updated ATSSS policies from the CN. The base station transmits the first set of updated ATSSS policies to the UE.