MAC-CE Enhanced SRS Burst Configuration for Doppler Sensing
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Solution Overview
Problem
Conventional methods for configuring burst transmissions to estimate Doppler shift in wireless communications networks introduce significant signaling overhead, making them inefficient for Doppler sensing applications.
Innovation Solution
The use of Medium Access Control (MAC)-Control Element (CE) enhancements to configure Sounding Reference Signal (SRS) burst transmissions, allowing for semi-persistent and periodic configurations through reserved bits in MAC-CE messages, reducing signaling overhead and enabling efficient Doppler sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional methods are used to configure burst transmissions for Doppler shift estimation, then the signaling overhead is large, but the Doppler sensing capability is maintained
Solution Approach 1:
The patent combines multiple configuration parameters (burst periodicity, burst length, SRS resource indication) into a single MAC-CE message format. This merging of configuration functions reduces the number of separate signaling messages required while maintaining complete control over the SRS burst transmission parameters for accurate Doppler sensing
Solution Approach 2:
The MAC-CE message is designed to serve multiple functions simultaneously: it activates/deactivates SRS resources, configures burst periodicity, sets burst length, and indicates SRS resource sets. This multi-functional approach eliminates the need for separate dedicated messages for each parameter, significantly reducing overall signaling overhead while preserving full Doppler sensing capability
2Use of energy by moving object
If continuous SRS transmissions are used to maintain Doppler sensing accuracy, then the energy consumption increases, but the velocity resolution is maintained
Solution Approach 1:
The patent implements periodic SRS burst transmissions instead of continuous transmissions. The MAC-CE message configures specific burst periodicity and burst length parameters, creating structured transmission intervals. This periodic approach maintains sufficient signal samples for accurate Doppler shift estimation and velocity resolution while significantly reducing energy consumption during non-burst periods
Solution Approach 2:
The system dynamically adjusts SRS transmission characteristics through MAC-CE configured parameters. The burst length and periodicity can be adapted based on Doppler sensing requirements, allowing the system to optimize between energy savings and measurement precision by adjusting the density and duration of transmission bursts according to actual needs
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise Doppler sensing without continuous SRS transmissions or excessive MAC-CE signaling, improving energy efficiency and reducing resource waste while maintaining high velocity resolution and unambiguous velocity capabilities.
Implementation Method 1
the network can be operated as a radar, allowing to estimate Doppler shift of signal transmissions, to obtain information about the speed of objects interacting with the signal
Data Source
AI summary
An apparatus includes at least one processor and at least one memory. The at least one memory stores instructions that, when executed by the at least one processor, cause the apparatus to: receive a medium access control (MAC)-control element (CE) message; determine a sensing signal burst configuration based on the MAC-CE message, the sensing signal burst configuration including at least one of a burst periodicity or a burst length of a signal burst; and transmit the sensing signal burst according to the sensing signal burst configuration.