Discontinuous Reception Control for IoT Early Data Transfer Power
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Solution Overview
Problem
In wireless communications, especially in IoT devices, existing technologies face challenges in efficiently managing power consumption during early data transfer (EDT) procedures, as devices continue to monitor control channels for extended periods, leading to increased power usage and resource consumption.
Innovation Solution
The implementation of discontinuous reception (DRX) during EDT random access procedures, where user equipment (UE) monitors control channels only during specific occasions and enters a low power mode between them, reducing the duration of active monitoring and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE continuously monitors control channels during EDT random access procedure, then control information reception reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where the UE monitors control channels periodically at specific intervals rather than continuously. The UE wakes up at predetermined monitoring occasions to check for control information and enters low-power mode between these occasions, achieving periodic action that balances reliability with power savings.
Solution Approach 2:
The patent dynamically adjusts the monitoring behavior of the UE based on the stage of the random access procedure. Different monitoring configurations are applied at different stages (initial access vs. data transfer phase), allowing the system to optimize between continuous monitoring for reliability and discontinuous monitoring for power efficiency depending on current operational needs.
2Measurement precision
If UE monitors control channels for extended periods during EDT, then control information detection accuracy is improved, but resource consumption increases
Solution Approach 1:
The UE performs control channel monitoring at periodic intervals defined by DRX cycles rather than continuously. This periodic action maintains detection accuracy by ensuring regular checks for control information while significantly reducing the total quantity of monitoring resources consumed over time.
Solution Approach 2:
The patent applies partial monitoring action where the UE monitors only a subset of all possible control channel occasions. By monitoring at selected intervals rather than every occasion, the system achieves sufficient detection accuracy for normal operation while reducing overall resource consumption.
3Use of energy by moving object
If UE enters low power mode during EDT random access procedure, then power consumption is reduced, but control information reception delay increases
Solution Approach 1:
The monitoring configuration dynamically adapts based on the random access procedure stage. During critical initial access phases, monitoring is more frequent to minimize delay. During later data transfer phases, monitoring becomes less frequent to maximize power savings, creating a dynamic balance between delay and power consumption.
Solution Approach 2:
The UE is pre-configured with DRX parameters and monitoring occasions before entering low-power mode. This preliminary configuration ensures that the UE can quickly resume monitoring at the next predetermined occasion without excessive delay, while still benefiting from extended low-power periods between monitoring events.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) to transmit to a base station a first message of a random access procedure, and the UE may monitor a control channel according to a first monitoring configuration. The UE may receive the second message from the base station in response to the first message. The second message may include a grant for a set of uplink resources for transmitting a third message of the random access procedure. The UE may transmit the third message including a data payload to the base station using the uplink resources, where the third message may include a data payload. The UE may monitor the control channel according to a second monitoring configuration (e.g., monitoring fewer occasions for control information than the first monitoring configuration), and the UE may receive the fourth message.