Wake-Up Signal Timing for DRX-Independent Paging
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Solution Overview
Problem
Existing wireless communication technologies, such as NB-IoT and LTE-M, artificially link the time gap between Wake-Up Signal (WUS) and Paging Occasion (PO) to discontinuous reception (DRX) or extended DRX, limiting the use of Wake-Up Receiver (WUR) efficiency, particularly for Rel-18 NR WUR where shorter DRX cycles offer greater gains.
Innovation Solution
A method and system for determining a time gap between WUS and PO independently of DRX or eDRX usage, allowing adaptive configuration based on individual device capabilities to optimize WUR energy consumption and minimize downlink latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the time gap between WUS and PO is artificially linked to DRX or eDRX, then the configuration is simplified, but the WUR efficiency is limited and downlink latency increases
Solution Approach 1:
The time gap between WUS and PO is made dynamic and adaptable rather than fixed. The network can now configure different time gap durations based on actual device capabilities and requirements, allowing the system to optimize WUR efficiency without being constrained by artificial links to DRX or eDRX modes.
Solution Approach 2:
The patent changes the parameter of time gap configuration from being indirectly determined through DRX/eDRX linkage to being directly configurable based on device capabilities. This allows independent optimization of the time gap parameter to maximize WUR performance.
2Ease of manufacture
If a fixed time gap is used between WUS and PO, then the system is easier to implement, but energy consumption cannot be optimized for individual device capabilities
Solution Approach 1:
The time gap configuration is customized for each device based on its specific capabilities rather than using a universal fixed value. This allows each device to operate with the optimal time gap for its hardware characteristics, maximizing energy efficiency while maintaining implementation simplicity through capability-based configuration.
Solution Approach 2:
The system incorporates device capability information as feedback to determine the appropriate time gap configuration. By learning about individual device capabilities, the network can adjust the time gap parameter to optimize energy consumption for each specific device.
3Adaptability or versatility
If the time gap is extended to allow WUR operation, then WUR capability is enabled, but downlink latency increases
Solution Approach 1:
The time gap is dynamically adjusted based on the specific needs of each device and the requirements of WUR operation. This allows the system to use the minimum necessary time gap to enable WUR functionality, thereby reducing unnecessary latency while maintaining WUR capability where needed.
Data Source
AI summary
A method by a node, for handling a time gap. The node operates in a wireless communications network. The node determines a respective duration of a time gap. The time gap is between a transmission of one or more respective signals to wake-up one or more wireless devices operating in the wireless communications network and a beginning of one or more respective paging occasions. The determining is based on a condition. The condition is independent of whether or not the one or more wireless devices use discontinuous reception or extended discontinuous reception. The node initiates transmission of the one or more respective signals to the one or more wireless devices based on the determined respective duration.