Uplink Beam Index Indication for High-Frequency Communication
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Solution Overview
Problem
High-frequency communication systems face challenges in achieving optimal beamforming due to higher path loss and sensitivity to air absorption and shadow fading, resulting in a lower Signal to Interference plus Noise Radio (SINR) compared to LTE systems, which limits coverage and communication reliability.
Innovation Solution
A method and system for indicating and receiving an uplink beam index, where a base station detects and responds to uplink access signals from terminals, allowing for the selection of optimal uplink beams to ensure reliable data transmission and improved transmission performance by generating and sending access response indications based on uplink beam indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beamforming is adopted to ensure coverage of high-frequency communication, then coverage is improved, but device complexity increases due to the need for accurate channel state information and optimal beam selection
Solution Approach 1:
The base station performs preliminary actions by detecting uplink access signals and determining uplink beam indices before actual data transmission begins. This allows the system to pre-establish optimal beam configurations, reducing the complexity during active communication phases while maintaining coverage benefits.
Solution Approach 2:
The patent implements feedback mechanisms where terminals feed back channel state information and the base station feeds back uplink channel state information and beam indices. This closed-loop feedback system enables adaptive beamforming that maintains coverage while managing complexity through iterative optimization rather than exhaustive search.
2Reliability
If more antennae are accommodated per unit area to improve SINR, then transmission quality is improved, but device complexity and cost increase
Solution Approach 1:
The patent changes key parameters including carrier frequency, beamforming weights, and beam indices to optimize SINR without necessarily increasing antenna count. By dynamically adjusting these parameters based on channel conditions, the system achieves improved transmission quality while controlling hardware complexity.
3Manufacturing precision
If the base station waits to obtain beamforming weights before sending reference signals, then beamforming accuracy is improved, but loss of time occurs during the chicken-and-egg problem
Solution Approach 1:
The base station performs preliminary detection of uplink access signals and determines uplink beam indices before formal downlink transmission begins. This preliminary action breaks the chicken-and-egg deadlock by establishing initial beam configurations based on uplink measurements, enabling timely reference signal transmission while maintaining beamforming accuracy.
Solution Approach 2:
The uplink access signal serves as an intermediary that provides channel state information without requiring prior downlink beamforming. This intermediary mechanism allows the base station to obtain necessary information for beam selection without being stuck in a waiting loop, thus reducing time loss while preserving accuracy.
Data Source
AI summary
Provided are a method, system and apparatus for indicating and receiving an uplink beam index. The indicating method includes that: a base station detects a first uplink access signal of a terminal from at least one uplink access signal received from the terminal according to a preset rule; the base station acquires corresponding related information from the first uplink access signal; and the base station generates an access response indication by virtue of an uplink beam index corresponding to the first uplink access signal, and sends the access response indication.