Adaptive DRX Configuration for Downlink Jitter Handling
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Solution Overview
Problem
Wireless communication systems face challenges in managing downlink traffic jitter, which affects UE power consumption and efficiency, especially in scenarios with periodic data arrival patterns, leading to unnecessary power usage due to early or late data bursts.
Innovation Solution
Implementing a configuration for Discontinuous Reception (DRX) operation at User Equipment (UE) with a time offset for wake-up signals or sequence-based wake-up mechanisms, allowing the UE to adjust its wake-up times based on scheduled data arrival, thereby minimizing the impact of jitter and optimizing power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors for downlink data continuously or with fixed DRX cycles, then data reception reliability is improved, but power consumption increases due to unnecessary monitoring during jitter-induced early or late data bursts
Solution Approach 1:
The patent applies dynamics by making the DRX configuration adaptive rather than fixed. The base station dynamically adjusts DRX parameters including time offsets and wake-up signal timings based on observed downlink traffic patterns and jitter characteristics. This allows the UE to adapt its monitoring schedule to actual data arrival patterns, maintaining reliable reception while reducing power consumption during low-activity periods.
Solution Approach 2:
The patent changes key parameters of the DRX operation including time offsets for wake-up signals, DRX cycle durations, and on-duration timings. These parameter adjustments are made in response to measured traffic jitter, allowing the system to optimize the balance between reliable data reception and reduced UE power consumption by aligning monitoring activities with actual data arrival patterns.
2Reliability
If the UE wakes up earlier to accommodate early data bursts, then data reception reliability is improved, but power consumption increases due to extended monitoring periods
Solution Approach 1:
The patent implements preliminary action by having the base station predict potential early data burst arrivals based on observed traffic patterns and proactively configuring appropriate time offsets for wake-up signals. This allows the UE to wake up just in time for anticipated early data bursts without needing to extend monitoring periods excessively, thus maintaining reliability while minimizing unnecessary wake-up time.
Solution Approach 2:
The system uses feedback mechanisms where the base station monitors actual data arrival patterns and adjusts DRX time offset configurations accordingly. This closed-loop approach ensures that wake-up timings are optimized based on real traffic behavior, preventing both premature wake-ups that waste power and late wake-ups that miss data.
3Device complexity
If the UE uses fixed DRX cycles, then device complexity is reduced, but adaptability to traffic jitter patterns deteriorates
Solution Approach 1:
The patent implements self-service by enabling the base station to automatically measure downlink traffic jitter patterns and autonomously optimize DRX configuration parameters. The base station performs the complex adaptation work itself, generating appropriate time offsets and wake-up signal timings based on observed traffic patterns, thereby maintaining simple UE implementation while achieving high adaptability to varying traffic conditions.
Solution Approach 2:
The base station acts as an intermediary that absorbs the complexity of traffic pattern analysis and DRX optimization. Rather than requiring the UE to perform complex jitter analysis and adaptation, the base station processes traffic patterns and provides optimized DRX configurations to the UE, simplifying the UE device while maintaining high adaptability to traffic jitter.
Data Source
AI summary
A configuration for handling downlink traffic jitter in wireless communication systems. The apparatus receives a configuration from a base station comprising a configuration for DRX operation based on a scheduled arrival time of data, wherein the configuration comprises a time offset for a WUS occasion or a DRX on duration for a plurality of DRX cycles of the DRX operation. The apparatus monitors for communication from the base station based on the time offset associated with the WUS occasion or the DRX on duration for each of the plurality of DRX cycles.