Non-Uniform Scheduling Request Configuration for DRX Power Reduction
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Solution Overview
Problem
In wireless communication systems, mismatches between downlink reception occasions and scheduling request occasions lead to increased power consumption and reduced battery performance in communication devices due to frequent interruptions of discontinuous reception (DRX) sleep cycles.
Innovation Solution
Implementing an uplink configuration with scheduling request occasions arranged according to a non-uniform spacing pattern in the time domain, which overlaps or corresponds with downlink reception occasions, based on a repeating periodicity or offset format, to improve coordination between downlink and scheduling request occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If scheduling request occasions are arranged at regular intervals according to a uniform spacing pattern, then the scheduling request transmission is simple and predictable, but the coordination between downlink reception occasions and scheduling request occasions deteriorates, causing frequent interruptions of DRX sleep cycles and increased power consumption
Solution Approach 1:
The patent applies dynamics by transitioning from a static uniform spacing pattern to a dynamic non-uniform spacing pattern for scheduling request occasions. The spacing between consecutive scheduling request occasions varies according to a defined pattern, allowing the system to adapt the timing to better align with downlink reception occasions. This dynamic adjustment reduces unnecessary wake-ups during DRX sleep cycles while maintaining reliable scheduling request transmission capability.
2Device complexity
If scheduling request occasions are arranged at regular intervals, then the uplink configuration is simple to implement, but the coordination with downlink reception occasions deteriorates, leading to mismatches and increased power consumption
Solution Approach 1:
The patent applies parameter changes by modifying the time domain parameters of scheduling request occasions from a uniform spacing pattern to a non-uniform spacing pattern. Specifically, the time intervals between consecutive scheduling request occasions are varied according to a defined pattern, allowing better alignment with downlink reception occasions. This parameter adjustment improves coordination without requiring fundamental changes to the uplink configuration structure.
3Stability of the object's composition
If scheduling request occasions are arranged at regular intervals, then the transmission timing is consistent and simple to manage, but the alignment with downlink reception occasions deteriorates, causing frequent DRX sleep cycle interruptions
Solution Approach 1:
The patent applies dynamics by introducing variability in the spacing between scheduling request occasions while maintaining overall timing stability. The non-uniform spacing pattern is defined by specific mathematical relationships that ensure consistent, predictable timing behavior while allowing individual intervals to vary. This dynamic approach enables better alignment with downlink reception occasions, reducing unnecessary DRX sleep cycle interruptions and improving battery performance.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine a downlink configuration including a set of resources for receiving downlink transmissions. The UE may determine, based on the downlink configuration, an uplink configuration including a set of resources for transmitting scheduling requests at a set of scheduling request occasions. In some aspects, the set of scheduling request occasions may be arranged according to a non-uniform spacing pattern in the time domain. The UE may transmit, to a base station, one or more scheduling requests based on the uplink configuration.