UE Grouping for Wake-Up Signal Based on Paging Probability
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Solution Overview
Problem
Existing wireless communication networks face inefficiencies in energy consumption due to unnecessary wake-up signals, particularly when Rel-15 and Rel-16 UEs are deployed together, leading to increased energy expenditure and reduced battery life.
Innovation Solution
A method for distributing user equipment (UEs) among wake-up signal (WUS) groups in a uniform manner based on paging probability and discontinuous reception parameters, allowing for more precise and efficient wake-up signals to be transmitted, reducing unnecessary energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If group wake-up signals are used for Rel-16 UEs, then energy consumption is reduced and battery life is extended, but false paging increases when Rel-15 and Rel-16 UEs are deployed together
Solution Approach 1:
The patent segments UEs into different groups based on their release version (Rel-15 vs Rel-16) and assigns different WUS group identifiers to each segment. This allows the network to selectively apply group WUS to Rel-16 UEs while maintaining individual WUS for Rel-15 UEs, thereby reducing energy consumption for Rel-16 UEs without causing false paging issues when mixed deployments occur.
Solution Approach 2:
The patent applies different WUS transmission qualities and characteristics to different UE groups. Specifically, Rel-16 UEs receive group WUS with optimized parameters for energy efficiency, while Rel-15 UEs receive traditional individual WUS. This local differentiation ensures that each UE type receives the appropriate WUS treatment, preventing false paging while maximizing energy savings where applicable.
2Reliability
If individual wake-up signals are transmitted to each UE, then false paging is minimized, but energy consumption increases and battery life decreases
Solution Approach 1:
The patent segments the WUS transmission approach by UE type: individual WUS for Rel-15 UEs (maintaining reliability) and group WUS for Rel-16 UEs (reducing energy consumption). This segmented strategy allows the system to optimize for energy efficiency where possible while maintaining reliability for UEs that require it, rather than applying a one-size-fits-all approach.
Solution Approach 2:
The patent changes key transmission parameters including WUS group identifier, time-frequency resource allocation, and sequence initialization based on UE release version. These parameter changes enable the system to switch between individual and group WUS modes, optimizing the balance between false paging reduction and energy consumption for different UE types.
3Use of energy by moving object
If group wake-up signals are used for all UEs, then energy consumption is maximally reduced, but device compatibility between Rel-15 and Rel-16 UEs deteriorates
Solution Approach 1:
The patent segments UEs by release version and applies different WUS strategies to each segment. Rel-16 UEs benefit from group WUS with optimized energy consumption, while Rel-15 UEs continue to use individual WUS ensuring backward compatibility. This segmentation allows the network to simultaneously support both UE types with their respective optimal configurations.
Solution Approach 2:
The patent creates a universal WUS framework that can handle both individual and group WUS transmission modes within the same system. The network can dynamically select the appropriate mode based on UE capabilities, making the system universally compatible across different release versions while optimizing performance for each type.
4Productivity
If wake-up signal groups are not uniformly distributed, then UE distribution becomes uneven leading to inefficient resource utilization, but implementation complexity increases
Solution Approach 1:
The patent performs preliminary distribution of UEs into WUS groups based on their release version and identifier values before actual WUS transmission. This preliminary sorting ensures uniform distribution across groups, optimizing resource utilization and preventing any single group from becoming overloaded. The distribution logic is pre-established through clear formulas that balance UEs evenly.
Solution Approach 2:
The patent uses parameter changes in the distribution formula, specifically utilizing UE identifier values and group index calculations to achieve uniform distribution. By changing the grouping parameters based on UE characteristics, the system automatically balances the load across WUS groups without requiring complex real-time adjustments or centralized control.
Data Source
AI summary
Embodiments include methods for a user equipment (UE) to receive wake-up signals (WUS) from a network node in a radio access network (RAN) coupled to a core network (CN). Such methods include determining a WUS group assigned to the UE and a WUS resource associated with the assigned WUS group, based on the following: a paging probability (PP) indication assigned to the UE; a plurality of discontinuous reception (DRX) parameters; a mapping between a plurality of PP indication values and a plurality of available WUS groups; and a first identifier associated with the UE. Such methods also include, during a time period of the WUS resource, monitoring for a group WUS associated with the assigned WUS group. Embodiments also include complementary methods for network nodes in the RAN and the CN, as well as UEs and network nodes configured to perform such methods. FIG. 10 is selected for publication.