Wireless Beam Selection via Multi-Band Reference Signals
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Solution Overview
Problem
In wireless communication systems, especially for high-mobility devices like vehicles, existing technologies face challenges in rapidly determining and switching between optimal transmission and reception beams, leading to instability in data signal transmission and reception, particularly in fast-changing channel states.
Innovation Solution
A method and apparatus that transmit multiple reference signals via various transmission beams in a first frequency band, receive quality information related to these signals in a second frequency band, and determine the optimal transmission beam for data channel transmission based on this information, allowing for stable data signal transmission and reception even in rapidly varying channel states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple reference signals are transmitted via multiple transmission beams in a first frequency band to enable rapid beam determination, then the speed of beam detection is improved, but the complexity of the transmission system increases
Solution Approach 1:
The system segments the beam detection process by transmitting multiple reference signals through different transmission beams in a first frequency band. Each reference signal corresponds to a specific beam, allowing the receiving device to measure and evaluate each beam's quality independently. This segmentation enables rapid identification of the optimal beam without requiring complex exhaustive search procedures.
Solution Approach 2:
Reference signals serve as intermediary elements that facilitate beam quality assessment. These signals are transmitted through various transmission beams and carry information about channel conditions. The receiving device uses these intermediary reference signals to determine beam quality metrics, which then inform the selection of the optimal transmission beam for data communication.
2Reliability
If beam switching is performed rapidly to adapt to fast-changing channel states in high-mobility environments, then the reliability of data signal transmission is improved, but the time required for beam determination increases
Solution Approach 1:
The system performs preliminary beam quality assessment by transmitting and measuring reference signals before actual data transmission begins. This preliminary action allows the receiving device to pre-determine the optimal transmission beam based on current channel conditions. By completing beam determination in advance, the system avoids time-consuming beam searches during critical data transmission phases, thus reducing overall beam determination time while maintaining reliability.
Solution Approach 2:
The system implements feedback mechanisms where the receiving device measures reference signal quality and provides information about optimal beam selection back to the transmitting device. This feedback loop enables rapid adaptation to changing channel conditions in high-mobility environments. The transmitting device uses this feedback to quickly switch to the optimal beam, maintaining reliable data transmission without excessive determination time.
Data Source
AI summary
A method by which a terminal transmits a data channel in a wireless communication system is disclosed. Particularly, in the disclosure, a plurality of reference signals are transmitted through a plurality of transmission beams within a first frequency band, first information related to the reception quality of at least one reference signal from among the plurality of reference signals is received within a second frequency band, a transmission beam through which the data channel is to be transmitted is determined on the basis of the first information, and the data channel is transmitted through the transmission beam within the first frequency band, wherein the first frequency band is higher than the second frequency band.