Cellular Terminal DRX Cycles for Active-State Power Saving
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Solution Overview
Problem
Existing cellular systems face challenges in reducing power consumption, particularly in terminals with burst characteristics and diverse quality of service (QoS) requirements, especially in active states where data transmission is minimal.
Innovation Solution
A method involving low power-consuming operation parameters, including an indicator, is used to control power-saving operations in terminals by establishing and maintaining DRX cycles based on the indicator's value, adjusting DRX cycle lengths, and synchronizing physical layer uplink sync times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a terminal performs low power-consuming operation using DRX cycle in idle state, then power consumption is reduced, but the terminal cannot respond timely to packet service requirements in active state
Solution Approach 1:
The patent segments the terminal operation into distinct idle state and active state, applying different power-saving strategies to each. In idle state, the terminal uses conventional DRX cycle for maximum power saving. In active state, the terminal transitions to transmission suspension mode with customized DRX parameters to balance power consumption and response timeliness for packet services.
Solution Approach 2:
The patent dynamically adjusts the DRX cycle parameters based on the terminal's operational state and packet service requirements. The base station controls the transmission suspension mode and customizes DRX parameters (such as drx-InactivityTimer, drx-RetryingTime) according to the specific packet service characteristics, allowing the system to adapt between power saving and response timeliness requirements.
2Use of energy by moving object
If the terminal uses conventional DRX cycle for power saving, then power consumption is reduced, but the diverse QoS requirements of packet services cannot be met
Solution Approach 1:
The patent applies local quality by customizing DRX parameters specifically for transmission suspension mode in active state, separate from the conventional idle state DRX cycle. The base station configures specific parameters (drx-InactivityTimer, drx-RetryingTime, drx-StartOffset) according to the packet service's QoS requirements, allowing different quality levels to be supported while maintaining power saving benefits.
Solution Approach 2:
The patent changes DRX parameters dynamically based on packet service requirements. The base station controls and adjusts parameters such as DRX cycle length, inactivity timer, and retransmission time according to the specific QoS needs of different packet services, enabling the system to adapt to diverse quality requirements while managing power consumption.
3Reliability
If the terminal remains in active state to maintain response capability, then response timeliness is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic action through the transmission suspension mode with customized DRX cycles. The terminal periodically checks for packet service requirements while maintaining a lower power state compared to full active state. This periodic monitoring mechanism allows the terminal to respond to packet services when needed while significantly reducing power consumption during periods without data transmission.
Data Source
AI summary
Provided is a method and apparatus for discontinuously transmitting/receiving packets for low-power consumption of a terminal in a cellular system for packet transmission. The present invention provides a method and apparatus that can perform a low-power consuming operation when a terminal is in active state in a cellular system. The method for discontinuously transmitting/receiving packet data to reduce power consumption of a terminal in a cellular system, including the steps of: a) establishing discontinuous transmission/reception (DTX/DRX) parameters including discontinuous DTX/DRX cycle information for terminals operating in a transmission suspension mode, which is a sub-state of an active state; and b) performing DTX/DRX based on the DTX/DRX parameters in the terminals operating in the transmission suspension mode.