Wireless Timing Advance Grouping to Reduce Signaling Overhead
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Solution Overview
Problem
Existing Timing Advance (TA) adjustment mechanisms in wireless communication systems, such as LTE and NR, result in high signaling overhead due to rapid changes in uplink synchronization errors in low-orbit satellite networks and high numbers of IoT devices, leading to inefficiencies in managing uplink synchronization.
Innovation Solution
Implementing flexible TA adjustment schemes that group user devices based on capabilities and geographical locations, using both group-based and UE-specific TA signaling to reduce signaling overhead and improve synchronization management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional UE-specific TA adjustment signaling is used to maintain uplink synchronization, then synchronization accuracy is improved, but signaling overhead increases significantly
Solution Approach 1:
The patent segments user devices into multiple groups based on geographical location and device capabilities. Each group receives group-based TA adjustment signaling instead of individual UE-specific signaling, reducing the total number of signaling messages while maintaining synchronization accuracy within each group.
Solution Approach 2:
The patent merges multiple UE-specific TA adjustments into a single group-based TA adjustment signaling message that applies to all devices in a group. This combining approach significantly reduces signaling overhead while maintaining adequate synchronization for devices with similar characteristics.
2Reliability
If frequent TA adjustments are made to accommodate rapid changes in low-orbit satellite networks, then synchronization reliability is improved, but signaling overhead and network complexity increase
Solution Approach 1:
The patent implements dynamic group formation and TA adjustment mechanisms that adapt to the specific characteristics of low-orbit satellite networks. Groups are formed and adjusted based on real-time satellite position and device mobility patterns, allowing frequent TA adjustments only when necessary while reducing signaling during stable periods.
Solution Approach 2:
The patent changes the parameter of TA adjustment from UE-specific to group-based, and introduces capability-based grouping parameters. This allows the system to handle rapid changes in low-orbit satellite networks by adjusting TA for groups of devices simultaneously, reducing signaling overhead while maintaining synchronization reliability.
3Productivity
If group-based TA adjustment is implemented to reduce signaling overhead, then signaling efficiency is improved, but adaptability to diverse device capabilities decreases
Solution Approach 1:
The patent applies local quality by creating different group types based on device capabilities (e.g., satellite-capable devices, terrestrial devices, IoT devices). Each group receives TA adjustment signaling optimized for its specific characteristics, maintaining adaptability to diverse device capabilities while achieving signaling efficiency through group-based adjustments.
Solution Approach 2:
The patent implements dynamic capability-based grouping where devices can be moved between groups based on their capabilities and current operational state. This dynamic reconfiguration allows the system to maintain high signaling efficiency through group-based TA adjustments while preserving adaptability to diverse device capabilities.
Data Source
AI summary
Methods, systems, and devices for TA adjustment schemes in a wireless communication are described. A wireless communication method is provided to include transmitting, by a network device, to a user device, a timing advance (TA) signaling including one or more TA adjustment parameters, the one or more TA adjustment parameters determined partially depending on the group of the user device.