WTRU Wake-Up Scheduling for Idle Network Energy Savings
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Solution Overview
Problem
Existing wireless networks face significant energy consumption due to idle processing operations, such as baseband processing and beamforming, even when there is no data transmission, leading to increased operational costs and environmental impact.
Innovation Solution
Implementing a method in wireless transmit/receive units (WTRUs) to determine availability states and transmit wake-up requests using specific resource levels, allowing the network to reduce processing operations when no data is expected, and adjusting transmit power based on availability levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network continues processing operations (baseband processing, beamforming) during idle periods, then processing readiness is maintained, but energy consumption increases
Solution Approach 1:
The patent implements periodic wake-up requests at specific occasions (first wake-up request occasion, second wake-up request occasion) instead of continuous processing. The WTRU transmits wake-up requests periodically when needed, allowing the network to enter low-power states between these periodic actions, thus reducing energy consumption while maintaining processing readiness when required.
Solution Approach 2:
The patent dynamically adjusts the WTRU's availability state between different levels (first level of availability, second level of availability) based on data transmission needs. The network can transition between active processing states and low-power states dynamically, rather than maintaining a fixed processing level, thereby optimizing the balance between reliability and energy consumption.
2Reliability
If the WTRU transmits wake-up requests with higher power, then the network can be reliably woken up, but transmit energy consumption increases
Solution Approach 1:
The patent applies partial action by transmitting wake-up requests only when necessary (at specific wake-up request occasions) rather than continuously. The transmit power is adjusted to be sufficient for reliable reception at these partial intervals, avoiding excessive energy consumption that would result from continuous high-power transmissions.
Solution Approach 2:
The patent changes the transmit power parameter dynamically based on the WTRU's availability state and the specific wake-up request occasion. Different transmit powers are used for first wake-up requests versus second wake-up requests, optimizing the balance between reliability and energy consumption by adapting the power level to the actual need.
Data Source
AI summary
The disclosure pertains to methods and apparatus for network energy savings. A method may be implemented in a wireless transmit/receive unit (WTRU). The method may include receiving first information indicating (i) one or more scheduling request (SR) resources and (ii) a set of wake-up request occasions, wherein each SR resource may be associated with one or more levels of availability. The method may include determining that the WTRU may be at a first level of availability. The method may include transmitting a first wake-up request using a first wake-up request occasion of the set of wake-up request occasions based on a determination that a SR may be to be transmitted using a SR resource associated with a second level of availability of the one or more levels of availability. The method may include transmitting the SR in the SR resource associated with the second level of availability.