DRX Cycle Timing for Non-Integer Reception Intervals
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Solution Overview
Problem
Existing LTE/5G communication systems face challenges in efficiently managing discontinuous reception (DRX) cycles, particularly when configuration parameters indicate non-integer values, leading to inefficiencies in power consumption and network performance.
Innovation Solution
A method for determining DRX cycles based on whether DRX configuration parameters indicate a non-integer value, allowing for precise DRX cycle adjustments and initiating DRX on-duration timers to optimize power usage and network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If non-integer DRX cycle values are configured, then power saving is improved, but system complexity increases due to rounding requirements
Solution Approach 1:
The patent changes the parameter representation from strict integers to non-negative rational numbers (fractions), allowing DRX cycle values to be expressed as ratios of two integers. This enables precise configuration of DRX cycles while maintaining systematic handling through the numerator/denominator structure, resolving the contradiction between power saving precision and system complexity.
2Use of energy by moving object
If non-integer DRX cycle values are used, then power saving is improved, but implementation complexity increases due to rounding operations
Solution Approach 1:
The patent performs preliminary configuration by defining the DRX cycle as a rational number with numerator and denominator before actual DRX operation begins. The network device configures these parameters in advance, and the wireless device pre-processes them to determine the actual DRX cycle length, avoiding complex rounding operations during runtime and simplifying implementation.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network device provides indication information (such as a radius value or offset) that mediates between the configured rational number and the actual DRX cycle execution. This intermediary allows flexible adjustment of the DRX cycle without requiring complex rounding logic in the wireless device, reducing implementation complexity while maintaining power saving benefits.
Data Source
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Figure 2A~2B
Figure 3
AI summary
A method may include receiving, by a wireless device, one or more discontinuous reception (DRX) configuration parameters indicating a first DRX cycle, a DRX slot offset, and a DRX on-duration timer. The method may also include determining, for starting the DRX on-duration timer, a DRX cycle based on whether the one or more DRX configuration parameters indicate a second DRX cycle with a non-integer value. The DRX cycle is determined to be the first DRX cycle, when the one or more DRX configuration parameters does not indicate the second DRX cycle with the non-integer value. The DRX cycle is determined to be the second DRX cycle, based on the one or more DRX configuration parameters indicating the second DRX cycle with the non-integer value. The method may further include starting, after the DRX slot offset from a subframe determined based on the DRX cycle, the DRX on-duration timer.