Common-Identifier Wake-Up Signals for Lower DRX Signaling Overhead
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Solution Overview
Problem
Conventional techniques for transmitting wake-up signals in discontinuous reception (DRX) mode in wireless communications systems are inefficient, leading to increased resource usage and power consumption due to the use of UE-specific identifiers for each UE, especially in systems serving a large number of UEs.
Innovation Solution
Configuring a group of UEs with common identifiers, such as wake-up signal RNTIs, to monitor wake-up signals, allowing UEs to determine if the signal is intended for them, thereby reducing the need for UE-specific identifiers and optimizing resource and power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE-specific identifiers are used for each UE to monitor wake-up signals, then each UE can accurately identify its own wake-up signal, but the base station experiences increased overhead signaling and reduced resource efficiency
Solution Approach 1:
The patent merges multiple UE-specific wake-up signal monitoring processes into a single group-based monitoring process. UEs are configured with group identifiers that allow them to monitor wake-up signals intended for their group, consolidating the overhead from multiple individual identifier-based signals into a single group-based signal structure.
Solution Approach 2:
The group identifier serves multiple functions: it identifies the group of UEs, enables wake-up signal monitoring for all UEs in the group, and reduces the need for individual UE-specific identifiers. This universal identifier approach allows a single wake-up signal to serve multiple UEs simultaneously, improving resource efficiency while maintaining reliable identification.
2Reliability
If UE-specific identifiers are used for wake-up signal monitoring, then individual UEs can be precisely targeted, but power consumption increases due to continuous monitoring requirements
Solution Approach 1:
The patent combines multiple individual wake-up signal monitoring operations into a single group-based monitoring operation. By configuring UEs with group identifiers, the system allows UEs to monitor a shared wake-up signal channel rather than maintaining separate monitoring processes, thereby reducing the cumulative power consumption while preserving accurate targeted delivery through group-specific identifier matching.
3Productivity
If common identifiers are used for groups of UEs, then resource efficiency and power savings improve, but the ability to target individual UEs is reduced
Solution Approach 1:
The patent segments the identifier space into two levels: group identifiers for common wake-up signal monitoring and UE-specific identifiers for individual targeting when needed. This segmentation allows the system to operate efficiently in group mode using common identifiers while retaining the capability to switch to individual UE targeting mode by utilizing UE-specific identifiers, thus balancing resource efficiency with adaptability.
Solution Approach 2:
The system dynamically switches between group-based and UE-specific identifier usage based on operational requirements. The base station can configure UEs to monitor group wake-up signals for efficient bulk operations, and when individual targeting is required, it can transition to using UE-specific identifiers, making the system adaptable to different service scenarios while maintaining overall resource efficiency.
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AI summary
Methods, systems, and devices for wireless communications are described. According to one or more aspects, a user equipment (UE) may receive a configuration message from a base station. The configuration message may configure the UE based on one or more identifiers associated with a group of UEs. The UE may determine at least one identifier based on receiving the configuration message, and may monitor a signal based on the at least one identifier. In some cases, the signal may indicate whether the UE should skip an upcoming duration associated with a discontinuous reception. The UE may then communicate with the base station, based on monitoring the signal.