Scheduling-Power Profile for UE Power Savings
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE, face challenges in optimizing power savings due to restrictive UE scheduling, which limits opportunities for reducing battery consumption in devices like smartphones and tablets.
Innovation Solution
Implementing a scheduling-power profile that allows user equipment (UE) devices to exchange radio resource control (RRC) signal messages with the base station to determine and constrain communication behavior, including slot scheduling, thereby enabling more flexible and power-efficient communication patterns, such as delayed acknowledgments and cross-slot scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If restrictive UE scheduling is implemented in LTE, then network control and reliability are improved, but power consumption increases due to frequent power ramp-ups and ramp-downs
Solution Approach 1:
The patent applies dynamics by transitioning from static, restrictive scheduling to dynamic scheduling profiles that adapt to UE capabilities and network conditions. The gNB can configure different scheduling profiles (e.g., profile 0 for power saving, profile 1 for low latency) and switch between them based on real-time requirements, allowing the system to optimize between reliability and power consumption dynamically rather than being locked into a fixed scheduling approach
Solution Approach 2:
The patent implements parameter changes by introducing configurable scheduling profile parameters such as PDCCH monitoring periodicity, slot offsets, and aggregation levels. These parameters can be adjusted to create different scheduling behaviors - for example, increasing PDCCH monitoring periodicity reduces the frequency of power ramp-ups, directly addressing the power consumption issue while maintaining acceptable network control through parameter optimization
2Productivity
If frequent PDCCH monitoring is required, then scheduling flexibility and responsiveness are improved, but battery life decreases due to increased power consumption
Solution Approach 1:
The patent applies periodic action by configuring PDCCH monitoring with specific periodicities (e.g., every 1, 2, 4, 8 slots) rather than continuous monitoring. The scheduling profile includes a PDCCH monitoring periodicity parameter that determines how frequently the UE wakes up to monitor for downlink control information. This periodic approach maintains scheduling responsiveness when needed while significantly reducing power consumption during intervals when monitoring is suspended
Solution Approach 2:
The patent implements preliminary action by pre-configuring multiple scheduling profiles with different PDCCH monitoring periodicities and characteristics before actual communication occurs. The gNB can select and activate the appropriate profile based on current service requirements, avoiding the need to frequently reconfigure parameters during operation and reducing the overhead of dynamic adjustments
3Device complexity
If UE communication behavior is constrained by fixed scheduling, then network coordination is simplified, but power savings opportunities are limited
Solution Approach 1:
The patent applies universality by creating a multi-functional scheduling profile framework that can serve different purposes through configuration. The same basic scheduling profile structure supports multiple functions: power saving mode with extended periodicity, low latency mode with shorter periodicity, different aggregation levels for various channel conditions, and cross-slot scheduling options. This universal framework maintains relatively simple network coordination while enabling diverse power saving strategies through parameter configuration rather than requiring separate complex mechanisms for each scenario
Data Source
AI summary
Apparatuses, systems, and methods for a wireless device to perform a method including a user equipment device (UE) exchanging communications with a base station to determine one or more scheduling profiles, such as one or more scheduling-power profiles, where a scheduling-power profile may specify one or more parameters associated with UE communication behavior, e.g., one or more constraints on UE communication behavior and/or slot scheduling of UE communications. In addition, the method may include the UE receiving a slot configuration schedule from the base station. The slot configuration schedule may be based on at least one scheduling-power profile of the one or more scheduling-power profiles. Further, the method may include the UE performing communications with the base station based on the at least one scheduling-power profile.