C-DRX Sleep Duration Adjustment for Packet Delay Reduction
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Solution Overview
Problem
In the context of 5G communication systems, electronic devices supporting connected mode discontinuous reception (C-DRX) face increased packet reception delays due to network-configured C-DRX parameters not considering the device's state, leading to inefficient power management and delayed packet receipt.
Innovation Solution
An electronic device with a communication processor that adjusts the C-DRX sleep duration based on its state, transmitting UE assistance information to the network to modify the inactivity timer and DRX cycle lengths, thereby optimizing packet reception timing and reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the electronic device uses a fixed C-DRX sleep duration configured by the network, then power consumption is reduced during sleep duration, but packet reception delay increases when packets arrive during sleep period
Solution Approach 1:
The patent applies dynamics by making the sleep duration of C-DRX adjustable rather than fixed. The communication processor dynamically changes the sleep duration based on the electronic device's state (power saving mode or performance mode), allowing the system to adapt between power efficiency and response speed. This resolves the contradiction by enabling the sleep duration to vary according to operational requirements.
Solution Approach 2:
The patent changes the parameter of sleep duration in C-DRX configuration. By transmitting UE assistance information to request modification of the inactivity timer value, the device alters the C-DRX parameter to adjust sleep duration. This parameter change allows the device to optimize between power consumption and packet reception delay based on current operational state.
2Device complexity
If the network configures C-DRX parameters without considering device state, then network control is simplified, but packet reception delay increases due to inappropriate parameter selection
Solution Approach 1:
The patent implements feedback by having the electronic device transmit UE assistance information to the network, informing the network about the device's state and preferred C-DRX parameters. This feedback mechanism allows the network to adjust C-DRX configuration based on actual device conditions, reducing packet reception delay while maintaining reasonable network control complexity through automated parameter adjustment.
Solution Approach 2:
The electronic device performs self-service by autonomously determining its own state (power saving or performance mode) and independently requesting appropriate C-DRX parameter adjustments. The device does not require complex network-side state monitoring but instead self-manages its C-DRX configuration based on internal state, reducing both device and network complexity.
3Loss of time
If the electronic device monitors downlink channel continuously, then packet reception delay is minimized, but power consumption increases significantly
Solution Approach 1:
The patent applies periodic action through C-DRX operation, where the device alternates between on-duration (monitoring) and sleep duration (non-monitoring) periods. During on-duration, the device monitors the downlink channel for packets; during sleep duration, it stops monitoring to save power. This periodic monitoring pattern resolves the contradiction by balancing power consumption and packet reception delay through structured intervals of activity and rest.
Data Source
AI summary
An electronic device and a method for operating the electronic device. The electronic device includes: a communication processor configured to support a C-DRX; and a communication circuit configured to switch a first on-duration period to a sleep duration according to expiration of a predetermined time corresponding to an inactivity timer, wherein the communication processor is configured to determine whether to change a length of the sleep duration of the C-DRX, based on a state of the electronic device, control the communication circuit to transmit UE assistance information for changing the length of the sleep duration of the C-DRX, based on the determination, to a network, and control an operation related to the C-DRX of the communication circuit, based on the inactivity timer having a changed predetermined time included in an RRC reconfiguration message received according to an RRC connection with the network. Various other embodiments are possible.