Radar Update Rate Adaptation for 5G Network Congestion
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR, the simultaneous transmission of radar measurements from multiple devices can lead to network congestion, as each device transmitting at a high rate can overwhelm the system, especially in dense environments.
Innovation Solution
Selecting a subset of radar-capable devices to transmit radar measurements and configuring them to adjust their transmission rates based on network state information and radar sensing precision/accuracy, thereby reducing the number of transmissions and alleviating congestion while maintaining effective environment mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all radar-capable devices transmit radar measurements at high rates simultaneously, then comprehensive environment mapping is achieved, but network congestion occurs
Solution Approach 1:
The patent segments the set of radar-capable devices into multiple subsets, where each subset transmits radar measurements at different update rates. This segmentation allows the system to maintain comprehensive environment mapping by distributing measurements across subsets while preventing network congestion by controlling the transmission rate of each subset individually.
Solution Approach 2:
Different subsets of radar-capable devices are assigned different update rates based on local conditions such as device density, radar sensing precision, and network state information. This local quality approach ensures that devices in less congested areas or with higher precision requirements transmit at higher rates, while devices in congested areas transmit at lower rates, optimizing both mapping accuracy and network load.
2Measurement precision
If update rate is increased to improve environment mapping quality, then mapping accuracy improves, but network load increases
Solution Approach 1:
The patent implements dynamic update rates for different subsets of radar-capable devices, where the update rate is not fixed but adjusted based on network state information and device characteristics. This dynamics allows the system to optimize the balance between environment mapping quality and network load by adapting transmission rates to current conditions rather than using a static high rate for all devices.
Solution Approach 2:
The system changes the parameter of update rate across different device subsets, creating a distribution of transmission rates rather than a uniform rate. By modifying this key parameter, the patent achieves better environment mapping quality where needed while reducing overall network load by having other subsets transmit at lower rates.
3Loss of time
If all devices transmit at maximum rate, then data freshness is improved, but system reliability decreases due to congestion
Solution Approach 1:
By segmenting devices into subsets with different update rates, the patent ensures that critical data freshness requirements are met by select subsets while other subsets transmit at lower rates to maintain system reliability. This segmentation prevents the system-wide congestion that would occur if all devices transmitted at maximum rate simultaneously.
Solution Approach 2:
The system uses network state information as feedback to determine appropriate update rates for different device subsets. This feedback mechanism allows the system to maintain data freshness by adjusting update rates based on current network conditions, ensuring reliability by preventing congestion while still providing timely updates where necessary.
Data Source
AI summary
A first apparatus is provided that is configured to receive, from a wireless device, an indication enabling radar measurement sharing; receive a first set of configuration parameters for the radar measurement sharing; perform a radar measurement based on the first set of configuration parameters and network state information; and transmit a first set of radar measurement transmissions at a first radar measurement transmission rate selected based on the first set of configuration parameters and the network state information. In some aspects, a second apparatus is provided that is configured to select a first set of UEs from a plurality of UEs for radar measurement sharing; transmit, to each UE in the first set of UEs, an indication enabling the radar measurement sharing; and receive, from each UE in the first set of UEs, a radar measurement transmission based on a radar measurement performed at a corresponding UE.