Adaptive Reference Signal Configuration for Low Radio Quality UEs
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Solution Overview
Problem
User equipment (UE) in wireless networks face limitations in power saving and synchronization efficiency during Inactive and Idle states, as they require frequent synchronization with cells, especially in low radio quality conditions, leading to reduced sleep time and increased power consumption.
Innovation Solution
The method involves transitioning UE to Idle or Inactive states and acquiring information about the need for additional reference signals for synchronization, sending an indication to cells for additional reference signal configuration, and monitoring and using these signals for synchronization, thereby enhancing power saving and synchronization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs in Idle or Inactive states perform frequent synchronization with cells, then synchronization reliability is improved, but power consumption increases and sleep time decreases
Solution Approach 1:
The patent applies local quality by providing different reference signal configurations tailored to specific UE radio quality conditions. UEs with low radio quality receive additional reference signals for synchronization, while UEs with good radio quality use standard signals, optimizing power consumption based on individual UE needs rather than uniform treatment
Solution Approach 2:
The patent changes the parameter of reference signal density and configuration based on UE radio quality metrics. By adjusting the number and distribution of reference signals according to UE conditions, the system achieves reliable synchronization for poor-quality UEs while allowing better-quality UEs to operate with fewer signals, reducing overall power consumption
2Productivity
If additional reference signals are provided to UEs with low radio quality, then synchronization efficiency is improved, but signaling overhead increases
Solution Approach 1:
Additional reference signals are provided locally only to UEs identified as having low radio quality conditions. The network distinguishes between different UE groups and applies enhanced reference signal configurations only where needed, avoiding unnecessary signaling overhead for UEs that do not require additional synchronization support
Solution Approach 2:
The patent implements partial action by providing reference signals at different densities based on UE needs. Rather than uniformly increasing reference signals for all UEs, the system applies enhanced signaling only partially to specific UEs with low radio quality, achieving synchronization efficiency improvements without proportionally increasing overall signaling overhead
Data Source
AI summary
A UE acquires information about a need of additional reference signals for synchronization purposes with cell(s), and sends to the cell(s), an indication that additional reference signals are needed for synchronization. The UE receives information of additional reference signal configuration to be used in the idle state or inactive state. The UE monitors for additional reference signals according to the additional reference signal configuration and uses the additional reference signals at least for synchronization purposes to synchronize with the cell(s). A cell in a wireless network sends information of additional reference signal configuration to be used by a UE while in either an idle state or an inactive state. The cell sends additional reference signals toward the UE according to the additional reference signal configuration.