Keep-Awake Message for Wireless Power Management
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Solution Overview
Problem
Current wireless communication systems face challenges in minimizing power consumption during data transmission and reception, particularly in optimizing the discontinuous transmission and reception mechanisms to balance power saving with responsiveness and error probability.
Innovation Solution
A keep-awake message mechanism is introduced, allowing user equipment to extend its active state based on resource allocation, using a direct bit sent over a dedicated control channel, which enables efficient power management without significant overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous transmission and reception is used to minimize power consumption, then power savings increase, but responsiveness and error probability worsen
Solution Approach 1:
The patent implements dynamic adjustment of the on-period duration in discontinuous reception based on resource allocation status. When resources are allocated for data transmission, the on-period is extended to maintain responsiveness. This dynamic adaptation resolves the contradiction by making the reception behavior flexible rather than fixed, allowing the system to optimize between power savings and responsiveness based on actual traffic conditions
Solution Approach 2:
The patent uses feedback from the resource allocation decision to control the on-period extension. The base station monitors whether resources are allocated and provides feedback by extending the on-period accordingly. This feedback mechanism ensures that the UE maintains appropriate responsiveness when data is available while still benefiting from power savings during idle periods, thus resolving the reliability-power consumption tradeoff
2Reliability
If the on-period is extended to maintain responsiveness, then reliability improves, but power consumption increases
Solution Approach 1:
The patent changes the time parameter (on-period duration) of discontinuous reception based on resource allocation conditions. Instead of using a fixed on-period, the system dynamically adjusts this parameter to extend only when necessary for data transmission. This parameter change approach allows the system to maintain responsiveness when needed while minimizing power consumption during idle periods, effectively resolving the contradiction between reliability and energy usage
3Use of energy by moving object
If discontinuous communication is implemented for power saving, then power consumption decreases, but scheduling flexibility is reduced
Solution Approach 1:
The patent introduces dynamic control of the on-period based on resource allocation, enabling the scheduling system to adapt to varying traffic conditions. By extending the on-period when resources are allocated and maintaining standard discontinuous reception otherwise, the system preserves scheduling flexibility while still achieving power savings during idle periods. This dynamic approach resolves the contradiction by making the communication pattern adaptable rather than rigid
Data Source
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AI summary
An approach is provided for receiving and transmitting data over a wireless network, while minimizing power consumption. The use of a keep-awake message for all users in a cell or on a per-user basis use of a keep-awake message is enabled. A determination is made, as part of a discontinuous communication mechanism defining an on-period for permitting transmission of data over a network, whether a resource allocation has been made to a user equipment for communicating over the network. If the resource allocation has been made, the keep-awake message is generated to instruct the user equipment to extend the on-period, wherein the keep-awake message is indicated by a direct bit sent to the user equipment over a dedicated control channel.