Multiple Timing Advances for Uplink Simultaneous Arrival
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR and LTE, uplink transmissions from multiple antennas, beams, and antenna panels often arrive at the base station at different times due to varying propagation delays, leading to undesirable distortion and reception issues.
Innovation Solution
The use of multiple timing advances (TAs) for uplink transmissions from different antennas, beams, and antenna panels is implemented to ensure that these transmissions arrive simultaneously at the base station, even with different propagation delays, by configuring and applying specific timing advances based on received timing information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple timing advances are configured for uplink transmissions from different antennas, then reception quality is improved and transmissions arrive simultaneously, but device complexity increases
Solution Approach 1:
The patent segments the timing advance configuration by antenna panel, where each antenna panel is assigned its own specific timing advance value. This segmentation allows independent optimization of timing for each panel, ensuring simultaneous arrival at the base station while maintaining manageable complexity through structured organization of timing parameters per panel.
Solution Approach 2:
The patent applies local quality by configuring different timing advance values tailored to each antenna panel's specific propagation characteristics. Instead of using a uniform timing advance for all antennas, the system customizes timing parameters locally for each panel based on its unique signal path, thereby optimizing reception quality for diverse spatial configurations.
2Object-generated harmful factors
If multiple timing advances are applied to ensure simultaneous arrival, then distortion is reduced, but the system requires more complex timing management and information processing
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple timing advance values for different antenna panels before transmission begins. The base station provides timing information in advance, and the UE prepares the appropriate timing adjustments ahead of time, ensuring that when transmissions occur, the timing is already optimized to prevent distortion without requiring complex real-time adjustments.
Solution Approach 2:
The patent employs feedback mechanisms where the base station measures the arrival times of uplink transmissions from different antenna panels and provides timing information back to the UE. This feedback loop enables continuous optimization of timing advances, allowing the system to adapt to changing propagation conditions while maintaining simultaneous arrival and minimizing distortion.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for using multiple timing advances for simultaneous uplink reception, for example, using multiple antennas, beams, and/or antenna panels. A method that may be performed by a user equipment (UE) includes configuring a plurality of timing advances (TAs) for a plurality of uplink transmissions using a plurality of antennas. The UE transmits the plurality of uplink transmissions to a base station (BS) using the plurality of antennas based on the plurality of timing advances. A method that may be performed by a BS includes receiving a plurality of uplink transmissions from a UE and transmitting timing information to the UE in a message, the timing information based on when each of the plurality of uplink transmissions was received at the BS.