UE-Initiated Dormancy Signaling for Low-Latency Power Saving
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Solution Overview
Problem
User equipment (UE) experiences excessive battery consumption and latency due to lost synchronization and resource overhead when entering dormancy states, leading to inefficient power management in wireless communication systems.
Innovation Solution
UE initiates dormancy procedures through signaling to a base station using RRC, MAC, and PHY layer resources, transmitting a connection suspend request with priority and duration indicators, and caching configuration parameters to maintain synchronization and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If UE enters dormancy state to save power, then battery consumption is reduced, but synchronization is lost and latency increases
Solution Approach 1:
The UE performs preliminary actions by caching configuration parameters and security contexts before entering dormancy state. This preparation ensures that when the UE needs to resume communication, it can quickly restore synchronization without extensive re-authentication, thereby reducing latency while maintaining power savings
Solution Approach 2:
The patent introduces an intermediary mechanism where the network stores contextual information about the UE in dormancy state. This intermediary storage allows the network to quickly re-establish communication with the UE without requiring full synchronization procedures, thus reducing latency while the UE remains in low-power mode
2Use of energy by moving object
If UE releases data connection to enter dormancy, then power consumption is reduced, but resource overhead increases and synchronization is impeded
Solution Approach 1:
The patent extracts only the essential configuration parameters and security contexts that are needed for quick resume, storing them in a cached format. This selective extraction reduces the overhead compared to maintaining full connection state, while still enabling fast re-synchronization when the UE wakes from dormancy
Solution Approach 2:
The patent changes the state parameters of the connection from fully active to a simplified dormant state, where only critical parameters are maintained in cache. This parameter transformation reduces the resource overhead while preserving the ability to quickly restore full functionality when needed
Data Source
AI summary
Methods, systems, and devices are described for enhanced power savings in wireless devices through mobile initiated dormancy procedure. A user equipment (UE) may establish radio resource control (RRC) connectivity with a base station of the network, and transmit and receive one or more distinct signaling messages for dormancy state initialization and suspension at the UE. Dormancy state implementation at the UE may conserve available power resources at the UE during periods of inactive data transaction. The one or more signaling messages may contain a single or multi-bit indication for the receiving device, and may be transmitted via direct signaling on upper layer protocols of the data network or mapped to allocated resources of a data transmission. The signaling messages may sustain synchronization between the interpreted functional mode of the UE at the base station and the implemented mode at the UE.