Dynamic DRX Configuration for Satellite Mobility Signaling
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Solution Overview
Problem
Non-terrestrial network deployments, such as satellite-based systems, face challenges in maintaining communication device mobility due to fast satellite movement, leading to increased signaling overhead and power consumption.
Innovation Solution
The implementation of techniques that allow communication devices to receive configuration parameters for discontinuous reception cycles, enabling efficient cell reselection and power management, while reducing signaling overhead through multiplexing information in single messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous reception cycles are used for power saving in non-terrestrial networks, then power consumption is reduced, but device mobility and connection reliability deteriorate due to fast satellite movement
Solution Approach 1:
The patent implements dynamic DRX cycle length adjustment based on satellite movement characteristics. The network can configure different DRX cycle lengths (first, second, or third lengths) according to the satellite's orbital position and movement speed, allowing the system to adapt between power-saving mode and reliability mode. This dynamic adjustment resolves the contradiction by making the DRX cycle length a variable parameter rather than a fixed value.
Solution Approach 2:
The patent changes the parameter of DRX cycle length based on satellite ephemeris information and movement characteristics. By configuring different cycle lengths (e.g., shorter cycles when satellites move fast, longer cycles when they move slowly), the system optimizes the balance between power consumption and connection reliability. The network node transmits configuration information indicating the appropriate DRX cycle length for current satellite conditions.
2Ease of operation
If frequent cell reselection is performed to maintain mobility in non-terrestrial networks, then device mobility is ensured, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by providing the communication device with satellite ephemeris information and movement characteristics in advance. This allows the device to predict satellite positions and plan cell reselection proactively rather than reactively. The network configures appropriate DRX cycle lengths before the device needs to perform cell reselection, reducing the need for frequent signaling exchanges during actual mobility events.
Solution Approach 2:
The patent implements periodic cell reselection based on configured DRX cycles rather than continuous monitoring. The device performs cell reselection operations periodically according to the configured cycle length, which is optimized based on satellite movement characteristics. This periodic approach reduces signaling overhead compared to continuous monitoring while ensuring mobility is maintained through timely reselection events.
Data Source
AI summary
Methods, apparatus, and systems for reducing signaling overhead and power consumption while ensuring mobility of communication devices in non-terrestrial network deployment as well as terrestrial network deployment are disclosed. In one example aspect, a wireless communication method includes receiving, by a communication device from a wireless communication node, information comprising a configuration parameter that corresponds to a length of a discontinuous reception cycle of the communication device. The method also includes performing, by the communication device, an operation based on the configuration parameter.