Reference Signal Beam Access for High-Frequency Path Loss
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Solution Overview
Problem
Conventional access methods fail at high frequencies due to large path loss and narrow beam requirements, leading to access failures and long beam selection times, especially in non-line of sight channels.
Innovation Solution
A radio access method involving the transmission and reception of reference signals between nodes using low and high-frequency resources to determine line of sight and allocate high-frequency resources for optimal beam communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If conventional access methods are used at high frequencies, then transmission distance can be extended, but path loss increases and access failures occur
Solution Approach 1:
The patent performs preliminary beam selection and channel assessment at low frequencies before transitioning to high-frequency transmission. The base station and terminal exchange reference signals and measurement information at low frequency to identify suitable beams and assess channel conditions in advance, preventing access failures before they occur at high frequencies
Solution Approach 2:
The patent uses low-frequency reference signals as an intermediary to facilitate high-frequency communication. By first establishing beam relationships and channel quality metrics through low-frequency measurements, the system creates a foundation that enables reliable high-frequency transmission despite the inherent path loss at those frequencies
2Speed
If narrow beam requirements are imposed at high frequencies, then transmission directionality is improved, but beam selection time increases
Solution Approach 1:
The patent performs beam selection at low frequencies before high-frequency transmission by exchanging reference signals and measurement information. This preliminary beam identification reduces the beam selection time at high frequencies because the candidate beams are pre-selected based on low-frequency channel characteristics
Solution Approach 2:
The patent uses low-frequency channel measurements as a copy or proxy for predicting high-frequency channel behavior. By measuring reference signals at low frequency and using those measurements to guide high-frequency beam selection, the system avoids performing exhaustive beam searches at high frequencies, thus reducing beam selection time
3Use of energy by moving object
If narrow beam requirements are imposed at high frequencies, then energy concentration is improved, but access failures increase in non-line of sight channels
Solution Approach 1:
The patent performs preliminary assessment of line-of-sight conditions and channel quality at low frequencies before attempting high-frequency access. By measuring reference signals and evaluating channel characteristics in advance, the system can identify suitable beams and predict access success, reducing actual access failures at high frequencies
Solution Approach 2:
The patent uses low-frequency reference signal measurements as an intermediary to predict high-frequency channel conditions. The measurement information exchanged at low frequency provides insights into channel quality and beam suitability that help ensure reliable high-frequency access even in challenging non-line-of-sight conditions
Data Source
AI summary
A radio access method includes: receiving a first reference signal transmitted by a first node by means of a first frequency resource, on the basis of the first reference signal, determining a line of sight of the first node; On the basis of the line of sight, determining a wave originating direction of the line of sight; in the wave originating direction, notifying the first node of an allocated second frequency resource by means of the first frequency resource; transmitting a second reference signal to the first node by means of the allocated second frequency resource; and receiving measurement information which is obtained by means of measurement and on the basis of the second reference signal and is reported by the first node by means of the first frequency resource or the second frequency resource.