Multi-Beam Wireless Transmission via QCL Signaling
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G and LTE technologies, face challenges in efficiently configuring multi-beam simultaneous transmissions, which affect signal quality and reliability due to factors like beam blockage and fading.
Innovation Solution
The method involves determining and signaling quasi co-location (QCL) assumptions for transmission beams between base stations and user equipment, allowing for simultaneous transmission and reception of channel state information reference signals (CSI-RSs) via multiple beams, enabling improved beam management and robust communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-beam simultaneous transmissions are implemented, then reliability is improved through diversity against beam blockage and fading, but device complexity increases due to the need to manage multiple beams and their configurations
Solution Approach 1:
The base station determines and signals QCL assumptions for multiple transmission beams in advance before actual data transmission occurs. This preliminary configuration allows the UE to prepare appropriate reception settings ahead of time, enabling reliable multi-beam simultaneous transmissions without requiring complex real-time beam management during data transfer.
Solution Approach 2:
The patent introduces QCL (quasi co-location) assumptions as an intermediary mechanism that links multiple transmission beams to the UE. These QCL assumptions serve as a mediator that simplifies the relationship between multiple beams and the UE's reception processing, allowing the UE to handle multiple beams more efficiently by referencing the signaled QCL relationships rather than managing each beam independently.
2Reliability
If multiple transmission beams are configured for simultaneous transmissions, then robustness against signal degradation is improved, but the configuration complexity worsens due to additional signaling requirements
Solution Approach 1:
The base station determines and signals QCL assumptions for multiple transmission beams in advance before actual data transmission occurs. This preliminary configuration allows the UE to prepare appropriate reception settings ahead of time, enabling reliable multi-beam simultaneous transmissions without requiring complex real-time beam management during data transfer.
Solution Approach 2:
The patent utilizes QCL parameter signaling to efficiently configure multiple transmission beams. By changing and signaling specific QCL parameters that describe the spatial and temporal relationships between beams, the system can configure robust multi-beam transmissions without requiring full-blown complex configuration of each individual beam parameter, thus reducing overall configuration complexity.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for transmitting simultaneous multi-beams on the same wireless resource. One example method includes determining a set of transmission (TX) beams for simultaneous transmissions to or from a user equipment (UE), signaling to the UE an indication of the TX beams, and transmitting simultaneously via the TX beams.