Beam Management for Wireless Communication MPE Compliance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current beam management in wireless communication networks faces challenges in reducing signaling overhead and simplifying beam selection for uplink communication while avoiding Maximum Permissible Exposure limits, particularly in high-frequency 5G NR transmissions where uplink transmissions may exceed safe exposure levels.
Innovation Solution
An apparatus and method that determine whether a candidate uplink beam's transmission power parameter would violate Maximum Permissible Exposure limits based on measured downlink beams, and transmit an indication to the network node about the suitability of these beams for uplink communication, allowing for the selection of appropriate beams that comply with exposure limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional beam management methods are used for uplink communication, then beam selection can be performed, but signaling overhead increases and Maximum Permissible Exposure limits may be violated
Solution Approach 1:
The network node pre-determines and provides to the terminal node information about candidate uplink beams and their associated transmission power parameters before actual uplink transmission occurs. This preliminary provision of beam information allows the terminal node to select appropriate beams without extensive real-time signaling, thereby reducing signaling overhead while ensuring compliance with MPE limits through pre-calculated safe transmission parameters
Solution Approach 2:
The patent introduces an intermediate information structure that carries beam identification and associated transmission power parameters. This intermediary mechanism allows the network node to convey multiple beam options and their corresponding power settings in a single signaling message, reducing the number of separate signaling interactions needed while maintaining the ability to enforce MPE compliance
2Object-affected harmful factors
If extensive beam measurement and evaluation is performed to ensure MPE compliance, then user safety is improved, but processing time and latency increase
Solution Approach 1:
The network node performs beam suitability evaluation and MPE compliance determination in advance, before the terminal node needs to transmit uplink signals. By pre-identifying which candidate beams comply with MPE limits and providing this information to the terminal node, the system avoids time-consuming real-time evaluations during actual transmission, thereby reducing beam management latency while ensuring user safety
Solution Approach 2:
The patent utilizes transmission power parameters associated with each candidate beam to determine MPE compliance. By changing and evaluating different power parameters for different beams, the system can quickly identify compliant beams without extensive physical measurements, reducing the time required for beam management while ensuring exposure limits are not exceeded
3Measurement precision
If multiple candidate uplink beams are evaluated for MPE compliance, then beam selection accuracy improves, but computational complexity and power consumption increase
Solution Approach 1:
The patent extracts the computationally intensive task of evaluating multiple candidate beams for MPE compliance from the terminal node and relocates it to the network node. The network node performs the complex evaluations using its greater computational resources, then provides the results to the terminal node in a simplified format. This extraction reduces the power consumption at the terminal node while maintaining accurate beam suitability determination
Solution Approach 2:
Instead of requiring the terminal node to independently evaluate multiple candidate beams, the system uses the network node to create and provide copies of beam evaluation results. The terminal node receives pre-evaluated beam information including identification of compliant beams and associated transmission parameters, avoiding the need to perform duplicate computational work and reducing power consumption
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
Certain examples of the present invention relate to beam management in wireless communication. Certain examples provide an apparatus 110, 1200 comprising: means 1201 for determining whether at least one transmission power parameter for uplink transmission to a network node 120 via at least one respective candidate uplink beam would violate a maximum permissible exposure limit, the at least one candidate uplink beam and the at least one transmission power parameter being based, at least in part, on at least one respective measured candidate downlink beam; and means for transmitting to the network node at least one indication as to whether the at least one measured candidate downlink beam is suitable for use in uplink communication (i.e. uplink reception and/or transmission, the at least one indication being based at least in part on the determination.