Wakeup Grouping Sets for DRX Power Savings
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Solution Overview
Problem
Conventional wakeup signal configurations in wireless communications systems lead to power penalties due to unnecessary wake-ups of user equipment (UEs) in discontinuous reception (DRX) mode, especially in scenarios with traffic imbalances, where UEs with low traffic wake up unnecessarily alongside those with high traffic.
Innovation Solution
Implementing wakeup grouping sets that allow UEs to be configured into groups, enabling the base station to efficiently schedule and group UEs, reducing false wake-ups by sharing power penalties across UEs, and using a hopping pattern to further minimize unnecessary wake-ups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standing UE-specific and group-specific wakeup signal configurations are used, then all UEs can be monitored for wakeup signals, but UEs with low traffic wake up unnecessarily causing power penalties
Solution Approach 1:
The patent segments UEs into multiple groups using wakeup grouping sets, where each UE belongs to at least one group in each set. This segmentation allows the base station to selectively wake up only the necessary UEs or groups rather than all UEs, thereby reducing unnecessary wakeups and power consumption while maintaining reliable wakeup signal monitoring for UEs that actually need to be activated.
Solution Approach 2:
The patent implements dynamic wakeup grouping where the base station can flexibly configure and adjust wakeup grouping sets based on traffic conditions. This dynamic approach allows the system to adapt wakeup patterns to actual traffic needs, preventing unnecessary wakeups of UEs with low traffic while ensuring UEs with high traffic are properly monitored and woken up when needed.
2Productivity
If UEs are configured into fixed groups for wakeup signals, then scheduling efficiency improves, but false wakeups occur when no transmissions are scheduled for specific UEs
Solution Approach 1:
The patent makes wakeup grouping dynamic by allowing the base station to configure multiple wakeup grouping sets and selectively activate appropriate groups based on actual traffic conditions. This dynamic configuration enables the system to maintain scheduling efficiency by having pre-defined groups while avoiding false wakeups by only activating groups that actually have scheduled transmissions, thus converting the fixed group structure into a dynamically controlled wakeup mechanism.
Solution Approach 2:
The patent changes the parameter of wakeup grouping configuration from static to dynamic by introducing multiple wakeup grouping sets that can be selectively applied. This parameter change allows the system to adjust which groups are monitored or activated based on traffic conditions, thereby maintaining scheduling efficiency while reducing false wakeups caused by static group configurations that don't reflect actual traffic patterns.
3Loss of energy
If multiple wakeup grouping sets are configured, then false wakeups are reduced by sharing power penalties across UEs, but configuration complexity increases
Solution Approach 1:
The patent segments the wakeup signaling into multiple wakeup grouping sets, where each set contains multiple groups and each UE belongs to at least one group in each set. This segmentation distributes the power penalty across different UE groups and sets, reducing the impact of false wakeups on individual UEs while managing configuration complexity through structured organization of multiple grouping sets with clear UE-to-group mappings.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Some wireless communications systems (e.g., millimeter wave (mmW) systems) may support user equipment (UEs) operating in a discontinuous reception (DRX) mode. A UE, in these wireless communications systems, may receive signaling configuring the UE with a set of wakeup grouping sets. Each of the set of wakeup grouping sets may identify a set of groups of one or more UEs. The UE may subsequently receive a wakeup signal during a monitoring occasion for wakeup signals, and determine that the received wakeup signal indicates a group in a wakeup grouping set of the set of wakeup grouping sets that includes the UE. In response, the UE may initiate a wakeup procedure.