Uplink Wake-Up Signal Grouping for NES Cell SIB Requests
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Solution Overview
Problem
In wireless communication systems, network energy saving (NES) cells sharing a common uplink wake-up signal (WUS) configuration lead to inefficient resource allocation and reduced network energy savings due to unintended signal reception, while using individual WUS configurations for each NES cell increases signaling overhead.
Innovation Solution
UEs are configured to identify groups of NES cells with shared or overlapping coverage areas, using a common set of WUS parameters and cell-specific sub-configurations to transmit WUS, thereby optimizing resource allocation and reducing unintended signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common uplink wake-up signal configuration is used for all NES cells, then signaling overhead is reduced, but resource allocation efficiency deteriorates due to unintended signal reception
Solution Approach 1:
The patent segments the NES cells into different groups based on their coverage area relationships. Each group is assigned a dedicated uplink wake-up signal configuration, allowing cells within the same group to share common parameters while maintaining separate configurations for different groups. This segmentation prevents unintended signal reception while avoiding the need for completely separate configurations for each cell.
Solution Approach 2:
The patent applies local quality by assigning different uplink wake-up signal configurations to different NES cell groups based on their specific coverage characteristics. Each group receives configurations tailored to its local coverage area, allowing optimized resource allocation for each group while sharing common parameters within the group to reduce overall signaling overhead.
2Productivity
If individual uplink wake-up signal configurations are assigned to each NES cell, then resource allocation efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent merges the configuration parameters for NES cells that share common coverage characteristics. By grouping cells with overlapping or adjacent coverage areas, the system combines common parameters (such as wake-up signal timing and basic parameters) across multiple cells, reducing the total signaling overhead while maintaining efficient resource allocation through group-specific configurations.
Solution Approach 2:
The patent implements universality by designing uplink wake-up signal configurations that serve multiple NES cells within the same group simultaneously. The configurations are designed to be multi-functional, allowing a single configuration to efficiently manage wake-up signals for multiple cells with shared coverage characteristics, thereby reducing the number of separate configurations needed.
3Device complexity
If NES cells with overlapping coverage areas share a common WUS configuration, then signaling overhead is reduced, but unintended WUS reception increases
Solution Approach 1:
The patent segments NES cells into distinct groups based on their coverage area relationships. Cells with overlapping coverage areas are placed in separate groups, and each group is assigned a dedicated uplink wake-up signal configuration. This segmentation ensures that cells with overlapping coverage receive different configurations, preventing unintended WUS reception while maintaining manageable signaling overhead through shared parameters within groups.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Techniques described herein may enable a user equipment (UE) to identify one or more groups of network energy saving (NES) cells that may share an uplink wake-up signal (WUS) configuration for requesting a system information block (SIB). For example, the UE may receive a configuration indicating the groups of NES cells, a first set of uplink WUS parameters that are shared between NES cell groups, and second sets of uplink WUS parameters that are NES cell group-specific. The UE may transmit the uplink WUS to an NES cell or to a non-NES anchor cell to request an SIB for one or more NES cells or for one or more NES cell groups. Upon reception of the uplink WUS, the NES cell or non-NES cell may transmit one or more SIBs to the UE.