Re-synchronization Signal for 5G UE Power Savings
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Solution Overview
Problem
Current 5G NR specifications are complex and not adaptive to user equipment (UE) capabilities for handling measurement gaps and physical broadcast channel (PBCH) decoding, particularly for reduced capability UEs, leading to increased complexity and power inefficiency.
Innovation Solution
A re-synchronization signal (RSS) is generated and transmitted in each bandwidth part (BWP), including narrow-band BWPs, to enable UEs to achieve synchronization and perform radio resource management measurements without the need for measurement gaps, simplifying UE complexity and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement gaps are configured for UEs to perform SSB-based RRM/RLM measurements, then measurement accuracy is improved, but UE complexity and power consumption increase
Solution Approach 1:
The patent extracts the essential synchronization and measurement functions from the complex SSB-based measurement gap procedure by introducing a simplified reference signal specifically designed for RRM/RLM measurements. This reference signal carries only the necessary measurement information without requiring full SSB decoding, thereby reducing UE complexity while maintaining measurement accuracy.
Solution Approach 2:
The patent creates a simplified copy of the synchronization and measurement functionality by introducing a dedicated reference signal that replicates the essential measurement capabilities of SSBs without requiring the full SSB structure. This allows UEs to perform measurements on a lightweight signal format that consumes less power and requires less complex processing.
2Measurement precision
If measurement gaps are configured for UEs to perform SSB-based RRM/RLM measurements, then measurement accuracy is improved, but power consumption increases
Solution Approach 1:
The patent extracts the essential synchronization and measurement functions from the complex SSB-based measurement gap procedure by introducing a simplified reference signal specifically designed for RRM/RLM measurements. This reference signal carries only the necessary measurement information without requiring full SSB decoding, thereby reducing UE complexity while maintaining measurement accuracy.
Solution Approach 2:
The patent creates a simplified copy of the synchronization and measurement functionality by introducing a dedicated reference signal that replicates the essential measurement capabilities of SSBs without requiring the full SSB structure. This allows UEs to perform measurements on a lightweight signal format that consumes less power and requires less complex processing.
3Adaptability or versatility
If current NR specifications are used for handling measurement gaps and PBCH decoding, then comprehensive measurement capability is achieved, but adaptability to UE capabilities is reduced
Solution Approach 1:
The patent segments the measurement functionality into distinct components: a simplified reference signal for RRM/RLM measurements and the full SSB structure for initial access and system information. This segmentation allows reduced-capability UEs to utilize only the essential measurement portion without being burdened by the complexity of full SSB processing, while full-capability UEs can still access complete functionality.
Solution Approach 2:
The patent introduces dynamic adaptability by allowing the network to configure different reference signal parameters (such as bandwidth, periodicity, and resource allocation) based on UE capabilities. This dynamic configuration enables the system to adapt to different UE types (reduced-capability vs. full-capability) without requiring separate specification sets, thereby improving versatility while managing complexity.
Data Source
AI summary
Aspects provide for wireless communication between a UE and a radio access network (RAN) node in a wireless communication network. The RAN node may generate a re-synchronization signal (RSS) for a bandwidth part (BWP) of a plurality of BWPs and transmit the RSS in the BWP of a downlink to the UE. A first bandwidth of the RSS may be based on a second bandwidth of the BWP. The UE may receive the RSS in different RRC states and perform a measurement of the RSS for synchronization, for an early detection of a paging or wake-up signal, and/or for radio resource management (RRM) measurements or radio link monitoring (RLM) measurements. The UE may utilize a communication link with the RAN node based on the measurement and the RAN node may utilize the communication link to communicate with a group of UEs sharing at least one same RSS beam.