User Node Wake-Up Latency Signaling for Wireless Networks
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Solution Overview
Problem
Current wireless communication network user nodes face challenges in minimizing energy consumption while maintaining low latency, as existing solutions like Discontinuous Reception (DRX) and wake-up signaling do not account for user node-specific wake-up latencies, leading to increased latency and inefficient resource allocation.
Innovation Solution
A user node determines its wake-up latency and transmits this information to a network node, allowing the network node to set an optimal wake-up offset, enabling the user node to wake up at the right moment and reduce energy consumption by selecting appropriate sleep modes or radio resource control states, thereby optimizing transceiver architecture for energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If Discontinuous Reception (DRX) is used to decrease energy consumption during low data transmission activity, then energy consumption is reduced, but latency increases
Solution Approach 1:
The network node sends a wake-up signal in advance before the user equipment needs to receive downlink data. This preliminary action allows the user equipment to remain in sleep mode longer and wake up only when necessary, reducing energy consumption while maintaining low latency by pre-notifying the device of upcoming data transmissions
Solution Approach 2:
A wake-up signal acts as an intermediary between the network node and the user equipment. This intermediate signal enables the network to efficiently trigger the user equipment to wake up only when there is actual data to transmit, avoiding continuous monitoring and reducing both energy consumption and unnecessary latency
2Use of energy by moving object
If wake-up signaling is used to reduce energy consumption by having the user node wake up periodically, then energy consumption is reduced, but resource allocation overhead increases due to lack of user node specific wake-up latency knowledge
Solution Approach 1:
The user equipment provides feedback to the network node about its wake-up latency characteristics. This feedback mechanism allows the network node to adapt its wake-up signaling strategy to the specific capabilities of each user equipment, optimizing resource allocation and reducing overhead by avoiding one-size-fits-all approaches
Solution Approach 2:
The system changes the wake-up offset parameter based on user equipment specific wake-up latency characteristics. By dynamically adjusting this parameter according to individual device capabilities, the system achieves efficient energy consumption while minimizing resource allocation overhead through personalized optimization
3Device complexity
If a fixed wake-up offset is used for all user nodes, then resource allocation is simplified, but erroneous allocations occur due to varying modem implementation wake-up times
Solution Approach 1:
Instead of applying a uniform wake-up offset to all user equipment, the system applies locally optimized wake-up offsets tailored to each user equipment's specific wake-up latency characteristics. This local quality approach ensures that each device receives wake-up signals at the optimal time for its particular implementation, eliminating erroneous allocations while maintaining manageable resource allocation complexity
Data Source
AI summary
Methods, a user node and a network node are provided. The user node is configured to determine an indication of at least one wake-up latency of the user node, the at least one wake-up latency being a time period for the user node to wake-up and start to monitor a downlink channel transmitted by the network node of a wireless communication network; determine a message comprising the indication; and transmit the message to the network node. The network node is configured to receive from the user node a message, and set a wake-up offset for the user node based on the at least one wake-up latency comprised in the message, the wake-up offset being a time period between a wake-up signal transmission and a subsequent downlink channel transmission from the network node to the user node.