Beam Search Signal Port Separation for Faster THz Beam Alignment
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Solution Overview
Problem
The existing beam alignment methods in wireless communication systems, particularly in the terahertz (THz) band, face challenges due to the need for numerous beams and frequent re-alignment caused by terminal movement, leading to unstable links and prolonged alignment times.
Innovation Solution
A method for beam search in wireless communication systems that utilizes a specific port different from the downlink signal port, employing dedicated antenna arrays and beam sweeping with preconfigured patterns to enhance beam alignment efficiency and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam search is performed using conventional methods in THz band, then beam alignment can be achieved, but the alignment time becomes excessively long due to the large number of beams required
Solution Approach 1:
The patent segments the beam search process by separating beam search signal transmission from downlink signal transmission using different antenna arrays. The beam search function is isolated to specific antenna arrays, allowing independent optimization of beam search operations without affecting overall system performance, thus reducing alignment time while maintaining accuracy
Solution Approach 2:
The patent implements preliminary beam alignment using beam search signals transmitted before actual downlink communication. By performing beam search in advance using dedicated antenna arrays and signals, the system prepares optimal beam directions beforehand, eliminating the need for time-consuming beam search during active communication periods
2Reliability
If frequent beam re-alignment is performed to accommodate terminal movement, then link stability can be maintained, but communication interruptions increase due to repeated alignment procedures
Solution Approach 1:
The patent enables continuous downlink signal transmission using dedicated antenna arrays that operate independently from beam search operations. This continuity ensures that communication is not interrupted during beam re-alignment processes, as the downlink transmission can proceed simultaneously with beam search activities using separate antenna resources
Solution Approach 2:
The patent implements dynamic beam adjustment using beam search signals that can quickly adapt to terminal movement. The system dynamically updates beam directions based on current channel conditions while maintaining ongoing communications through the use of multiple antenna arrays, allowing flexible response to movement without communication breakdown
3Productivity
If dedicated antenna arrays are used for beam search signals, then beam alignment efficiency is improved, but device complexity increases due to multiple antenna arrays
Solution Approach 1:
The patent achieves multi-functionality by configuring certain antenna arrays to serve dual purposes: beam search signal transmission and downlink signal transmission. This universal usage of antenna arrays reduces the need for completely separate dedicated hardware for each function, thereby improving alignment efficiency while limiting the increase in overall device complexity through resource sharing
Data Source
AI summary
A method for receiving, by a terminal, a signal for a beam search in a wireless communication system, according to an embodiment of the present specification, includes the steps of: receiving a beam search signal (BSS); determining a reception beam (Rx beam) on the basis of the BSS; and receiving a downlink signal on the basis of the Rx beam, wherein the BSS is transmitted on the basis of a specific port that is different from a port related to the transmission of the downlink signal, and the BSS is transmitted on the basis of at least one antenna array configured exclusively for the specific port from among a plurality of antenna arrays.