UE Codebook Adjustment for Sensor Interference
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in managing internal interference from antenna elements that affect sensor and interface performance, such as camera image degradation due to radiated interference, especially when using beamforming and carrier aggregation.
Innovation Solution
The system determines the use of sensors or interfaces in user equipment (UE) and adjusts beam selection, transmission power, operation mode, or carrier aggregation performance to mitigate internal interference. This includes pruning codebooks to avoid interfering beams, limiting transmission power, switching to wider beams, changing radio access technologies, and adjusting carrier configurations based on indications from the UE to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beamforming and carrier aggregation are used to improve wireless communication performance, then communication efficiency and data rate are enhanced, but internal interference to sensors and interfaces increases causing image degradation and performance loss
Solution Approach 1:
The codebook is segmented into multiple subsets, each corresponding to different sensor usage states. When a sensor is active, the system selects a subset that excludes beams causing interference to that sensor. This segmentation allows the system to maintain high communication efficiency by using full codebooks when sensors are inactive while avoiding interference when sensors are active.
Solution Approach 2:
The system dynamically adjusts the codebook selection based on real-time sensor usage status. The network device receives indications from the terminal about sensor activity and dynamically switches between different codebook subsets. This dynamic adaptation ensures that beamforming operations are optimized for both communication performance and sensor protection depending on current operational conditions.
2Reliability
If transmission power is increased to improve signal quality and communication reliability, then connection stability is enhanced, but internal interference to sensors and interfaces increases causing performance degradation
Solution Approach 1:
The system applies different transmission power levels for different beams based on their interference characteristics. When a sensor is active, the system identifies beams that cause minimal interference and maintains higher power for those specific beams, while reducing or eliminating power for beams that would interfere with the sensor. This local quality adjustment ensures reliable communication on non-interfering beams while protecting sensor performance.
3Reliability
If codebook pruning is applied to avoid interfering beams and reduce sensor interference, then sensor performance is protected, but beam selection flexibility and communication optimization are reduced
Solution Approach 1:
The system maintains multiple codebook subsets that serve different functions: some subsets are optimized for communication performance while others are optimized for sensor protection. The network device can universally apply any subset based on current sensor usage status, making the system multi-functional. When sensors are inactive, full codebook flexibility is available; when sensors are active, appropriate subsets are selected to protect sensor performance while maintaining reasonable beam selection capability.
4Productivity
If carrier aggregation is configured to improve data rate and throughput, then communication productivity is enhanced, but internal interference to sensors increases causing image quality degradation
Solution Approach 1:
The system performs preliminary identification of interfering beams through beam characterization procedures before actual carrier aggregation operations begin. The terminal device provides interference information to the network device in advance, allowing the network to pre-select codebook subsets that avoid interfering beams. This preliminary action ensures that carrier aggregation can proceed with high data rates while preventing image quality degradation from the outset.
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
The solution effectively reduces internal interference, enhancing the performance of sensors and interfaces, such as cameras, by optimizing beam selection and power usage, thereby improving image quality and overall communication efficiency.
Implementation Method 1
a particular antenna element of a plurality of antenna elements used by the gNB for transmitting a signal to the UE may affect performance of a sensor or an interface at the UE. For example, use of the particular antenna element may cause image degradation for a camera of the UE due to an effect of radiated energy from the particular antenna element on a MIPI line
Data Source
AI summary
A UE may determine use of a sensor or an interface of the UE, and in response, may adjust at least one of a beam selection, a transmission power, an operation mode, or a performance of carrier aggregation for the UE. A base station may receive an indication from the UE that a carrier for which the UE is configured has an effect on performance of a sensor or an interface of the UE. The base station may adjust a configuration of the carrier or adjusting uplink grants for the carrier in response to receiving the indication from the UE.