Multi-Panel Uplink Scheme Selection for Inter-Beam Interference
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Solution Overview
Problem
Existing communication systems with multi-panel user equipment (MP-UEs) face challenges in simultaneous uplink transmission due to inter-beam interference and varying effective isotropic radiated power among panels, necessitating enhanced procedures for higher reliability and throughput.
Innovation Solution
A terminal device measures reference signals over multiple antenna groups, determines an uplink transmission scheme based on these measurements, and reports an indication to a network device, enabling simultaneous multi-panel transmission with reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous uplink transmission is performed using multiple antenna panels, then throughput is improved, but inter-beam interference increases and reliability deteriorates
Solution Approach 1:
The terminal device performs measurements on reference signals (DL-RS or UL-RS) in advance to determine interference levels between different antenna panels before actual uplink transmission. Based on these preliminary measurements, the device determines whether simultaneous transmission is feasible and selects appropriate transmission schemes, thereby preventing interference-related reliability issues before they occur.
Solution Approach 2:
The terminal device reports measurement results and interference determination information to the network device, enabling the network to adjust downlink reference signals or uplink transmission parameters accordingly. This feedback mechanism allows the system to adapt to interference conditions and maintain reliable simultaneous transmission.
2Productivity
If different antenna panels transmit simultaneously, then productivity increases, but inter-beam interference worsens transmission quality
Solution Approach 1:
The terminal device measures reference signals transmitted by different antenna panels and determines interference levels before actual data transmission. By performing this interference assessment in advance, the system can identify problematic beam pairs and adjust transmission parameters to minimize inter-beam interference while maintaining high throughput.
Solution Approach 2:
Based on interference measurement results, the terminal device selects from multiple transmission schemes (e.g., different TCI states, different time/frequency resources, different spatial filters) to transmit uplink data. This parameter adjustment allows the system to optimize transmission quality by choosing schemes that minimize interference for the current channel conditions.
3Adaptability or versatility
If effective isotropic radiated power varies among panels, then adaptability to different channel conditions improves, but transmission reliability deteriorates due to power imbalance
Solution Approach 1:
The terminal device determines effective isotropic radiated power for each antenna panel based on reference signal measurements and selects transmission schemes that account for power differences between panels. By adjusting transmission parameters according to each panel's power characteristics, the system maintains reliable simultaneous transmission despite power imbalances.
Solution Approach 2:
The system performs power level assessment of different antenna panels in advance through reference signal measurements. This preliminary knowledge of power characteristics allows the network and terminal to configure appropriate transmission schemes that compensate for power differences, ensuring reliable reception from all panels simultaneously.
Data Source
AI summary
Embodiments of the present disclosure relate to methods and apparatus for simultaneous uplink (UL) multi-panel transmission. A terminal device obtains at least one measurement value of a reference signal over two or more antenna groups of the terminal device; and reports an indication to a network device based on the measurement value, wherein the indication indicates at least one uplink transmission scheme that can be used. In this way, the terminal device can determine a proper transmission scheme for the multi-panel uplink transmission of the two or more antenna groups with higher reliability and/or higher UL throughput according to actual network conditions.