Group Wake-Up Signal Sequences for 5G UE Power Optimization
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face inefficiencies in power consumption due to the need for multiple wake-up signals (WUS) and paging occasions (PO), which can be improved by grouping user equipment (UE) to optimize signal transmission and reduce power usage.
Innovation Solution
A method where a base station groups UEs into multiple UE groups, assigns a unique wake-up signal sequence to each group, and transmits a wake-up signal indicating which UEs should wake up for a paging occasion, allowing for staggered and optimized WUS transmission, balancing legacy and updated UEs within groups, and enabling the turning on/off of WUS based on UE type and carrier specifics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple wake-up signals are transmitted to different UEs, then all UEs can be notified of paging occasions, but power consumption increases due to unnecessary wake-ups
Solution Approach 1:
The patent segments UEs into different groups (first group and second group) based on their capabilities (legacy vs. updated UEs). Each group receives targeted wake-up signals with group-specific identifiers, allowing the base station to notify only relevant UEs about paging occasions, thereby reducing unnecessary wake-ups and power consumption while maintaining reliable notification delivery.
2Reliability
If wake-up signals are transmitted to all UEs, then no UE is missed, but system efficiency decreases due to redundant signaling
Solution Approach 1:
The patent divides the UE population into distinct groups with different wake-up signal configurations. Updated UEs receive group-specific WUS with group IDs, while legacy UEs receive traditional WUS. This segmentation eliminates redundant signaling by targeting only UEs that need to be notified, improving system efficiency while maintaining complete paging delivery through multi-group coverage.
Solution Approach 2:
The patent applies different wake-up signal characteristics to different UE groups. Group-specific WUS parameters (sequence, duration, timing) are optimized for each group's capabilities. This local quality approach ensures efficient signaling for updated UEs while maintaining compatibility with legacy UEs, thereby improving overall system efficiency without compromising paging delivery completeness.
3Use of energy by moving object
If group-specific wake-up signals are used, then power consumption is reduced, but device complexity increases due to grouping management
Solution Approach 1:
The patent segments UEs into groups and assigns group IDs, which simplifies the wake-up signal structure rather than increasing complexity. Each UE only needs to monitor its assigned group's WUS parameters, reducing the complexity of signal processing at the UE side. The base station manages grouping through standardized procedures, keeping implementation complexity acceptable while achieving significant power savings.
4Reliability
If wake-up signal duration is extended to cover all UEs, then notification reliability improves, but time resources are consumed
Solution Approach 1:
The patent segments wake-up signal transmissions by UE group, allowing parallel or staggered transmission of group-specific WUS. This eliminates the need for extended single-group WUS duration, as multiple groups can be addressed simultaneously or in shorter sequential intervals. The segmentation approach maintains reliable notification delivery while reducing total time resource consumption compared to sequential coverage of all UEs.
Data Source
AI summary
The present disclosure relates to transmitting and receiving an improved wake-up signal (WUS) by grouping user equipment (UE). A base station may group and assign a plurality of UEs into UE groups. The base station can then determine and transmit a WUS identifying certain UEs to wake-up for a paging occasion (PO). The UEs can listen for their corresponding WUS. After receiving the WUS, the UEs can wake-up for the PO. The base station can also determine the total amount of different UE groups. Within each group, there can be both legacy and updated UEs, wherein each legacy UE receives the same legacy WUS and the updated UEs receive a group-specific WUS. The base station can also balance the amount of legacy and updated UEs within each group based on different factors. Also, each WUS can be turned on or off, which can be carrier specific.