UE Paging Time Gap Configuration via Link Quality Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications, user equipment (UE) often struggles to obtain accurate channel quality information due to inadequate timing gaps between paging early indications (PEI) and paging messages, leading to decoding failures, especially when the network is unaware of the UE's link quality.
Innovation Solution
The UE determines a time gap based on its link quality and transmits UE assistance information (UAI) to the base station, which configures a suitable time gap and coverage enhancement level, allowing the UE to accurately decode paging messages by monitoring during a configured inactive state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network uses a fixed time gap between PEI and paging occasion, then network configuration is simple, but the UE cannot obtain accurate channel information for decoding the paging message
Solution Approach 1:
The time gap between PEI and paging occasion is made dynamic rather than fixed. The network configures multiple time gap values, and the UE selects the appropriate gap based on its link quality measurements. This allows the system to adapt the time gap to actual channel conditions, ensuring accurate channel information for paging decoding while maintaining manageable configuration complexity through predefined options.
Solution Approach 2:
The UE provides feedback to the network about its link quality and preferred time gap through UE assistance information. This feedback mechanism enables the network to understand the UE's channel conditions and configure appropriate time gaps, resolving the contradiction between simple network configuration and accurate channel information acquisition.
2Reliability
If the UE measures more downlink reference signals to obtain accurate channel information, then decoding reliability improves, but power consumption increases
Solution Approach 1:
The number of downlink reference signals measured by the UE is dynamically adjusted based on link quality. When link quality is good, the UE measures fewer reference signals, reducing power consumption. When link quality deteriorates, the UE measures more reference signals to ensure accurate channel information for reliable paging decoding. This dynamic adjustment resolves the contradiction between reliability and power consumption.
Solution Approach 2:
The UE changes the parameter of reference signal measurement quantity based on link quality conditions. By adjusting this parameter dynamically, the system achieves reliable paging decoding when needed while minimizing power consumption during good channel conditions.
3Reliability
If the UE determines a customized time gap based on link quality, then communication reliability improves, but device complexity increases
Solution Approach 1:
The time gap determination process becomes dynamic, with the UE calculating the appropriate time gap based on measured link quality and reference signal periodicity. While this increases device complexity compared to using a fixed gap, it significantly improves communication reliability by adapting to actual channel conditions. The complexity is managed through standardized algorithms that use readily available measurements.
Solution Approach 2:
The UE autonomously determines its own preferred time gap based on its link quality measurements without requiring continuous network intervention. This self-service approach improves reliability by allowing the UE to adapt to changing conditions while managing the complexity within the UE itself, offloading the adaptation logic from the network.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for a user equipment (UE) to determine a time gap between receiving a paging early indication (PEI) and receiving a paging message based on a link quality of the UE. The UE may determine the time gap based on a number of reference signals the UE may measure after receiving the PEI to obtain channel information for accurately decoding a forthcoming paging message and a periodicity of the reference signals. The UE may transmit UE assistance information (UAI) to the base station during an active state to indicate the time gap. The UE may receive a configuration message from the base station indicating a configured time gap for the UE based on the UAI. The UE may receive the PEI and monitor a paging occasion for the paging message according to the configured time gap.