Adaptive Cell Broadcast Reception via Self-Learning DRX
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Solution Overview
Problem
Conventional methods for receiving Cell Broadcast Service (CBS) messages in terminal devices lead to high power consumption, negatively impacting standby time and increasing user interface complexity, as they require constant CBS function enablement.
Innovation Solution
Implementing a Discontinuous Reception (DRX) method with self-learning capabilities, where terminal devices receive CBS messages in intervals, detect changes, and adjust subsequent DRX periods to reduce power consumption by extending dormant intervals when messages remain unchanged and shortening receiving intervals when changes are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CBS function is enabled continuously to receive all CBS messages, then message reception reliability is improved, but power consumption increases significantly
Solution Approach 1:
The patent implements periodic reception by dividing the reception period into multiple cycles, where the terminal device wakes up periodically to check for CBS messages. Each cycle includes a reception phase where messages are received and a sleep phase where the device enters dormant state. This periodic action reduces power consumption while maintaining reliable message reception through consistent periodic checking.
Solution Approach 2:
The patent employs feedback mechanisms where the terminal device detects whether CBS messages have changed after receiving them. Based on this feedback, the device dynamically adjusts the next reception timing. If no changes are detected, the device can extend the sleep period; if changes are detected, it can wake up sooner. This feedback loop optimizes the balance between power consumption and message reception reliability.
2Use of energy by moving object
If fixed DRX period is used to reduce power consumption, then energy efficiency is improved, but adaptability to message changes deteriorates
Solution Approach 1:
The patent transforms the fixed DRX period into a dynamic configuration. The terminal device determines the next reception timing based on feedback about message changes. When CBS messages change, the device adapts by adjusting the reception schedule to detect these changes. This dynamic adjustment maintains low power consumption while improving adaptability to changing message content.
Solution Approach 2:
The terminal device performs self-learning by detecting message changes autonomously and adjusting its own reception schedule without external intervention. The device monitors CBS message characteristics, determines whether changes have occurred, and independently configures the next DRX period accordingly. This self-service capability enables the system to adapt to message changes while maintaining energy efficiency.
Data Source
AI summary
According to implementations of the subject matter described herein, a new approach for receiving the CBS message is proposed. Generally speaking, upon receipt of CBS messages from a network device in a first receiving time interval of a first DRX period, a terminal device will detect whether there is a change among the CBS messages. On the basis of the detection, the terminal device will determine a configuration of a second DRX period that at least includes a second dormant time interval after the first receiving time interval and a second receiving time interval for receiving further CBS messages. That is, the further CBS messages are received in a second DRX period determined through a self-learning process performed on the received CBS messages and the first DRX period. In this way, the power consumption of the terminal device for receiving the CBS messages can be reduced. As a result, the battery life of the terminal device can be guaranteed.