Beamforming Cell-Common Channels in 5G New Radio
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Solution Overview
Problem
Higher frequency bands in 5G radio communication systems face coverage limitations due to higher pass loss, and existing technologies do not effectively apply beamforming to cell-common signals and channels, leading to decreased coverage compared to lower frequency bands.
Innovation Solution
A method for radio communication that involves a base station transmitting multiple first signals using different radio resources, including beamforming cell-common signals and channels, allowing user equipment to select the best beam for reception and feedback to the base station for optimized signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beamforming is applied to cell-common signals and channels in higher frequency bands, then coverage is improved, but transmission complexity increases
Solution Approach 1:
The invention segments cell-common signals into multiple beams, where each beam is transmitted using a different radio resource (time, frequency, or spatial). This segmentation allows the base station to cover different directional regions with dedicated beams, thereby extending coverage area in higher frequency bands while managing transmission complexity through structured resource allocation.
Solution Approach 2:
The invention introduces spatial dimensionality to cell-common signal transmission by employing multiple beams in different directions. Instead of omnidirectional transmission, the system utilizes angular/spatial separation to transmit the same common signal through multiple directional beams, effectively expanding coverage area without proportionally increasing overall transmission complexity.
2Area of stationary object
If multiple beams are transmitted using different radio resources, then coverage enhancement is achieved, but signal resource allocation complexity increases
Solution Approach 1:
The invention makes radio resources universal by allowing the same cell-common signal to be transmitted through multiple beams using different time, frequency, or spatial resources. Each resource type serves multiple functions: time resources enable temporal diversity, frequency resources provide frequency diversity, and spatial resources deliver directional coverage. This multi-functionality approach achieves coverage enhancement while systematically managing resource allocation complexity.
Solution Approach 2:
The invention changes transmission parameters (time slots, frequency subcarriers, spatial beam directions) to create multiple beam versions of the same cell-common signal. By varying these parameters across different beams, the system achieves coverage enhancement through parameter diversity while maintaining organized resource allocation structures that manage complexity.
Data Source
AI summary
A method for wireless communication includes transmitting, with a base station (BS), multiple first signals using respectively different radio resources. The multiple first signals include a common signal component. The radio resource is identified by a radio resource ID. The method further includes receiving, with a user equipment (UE), out of the radio resources the multiple first signals from the BS, selecting, with the UE, a radio resource based on a reception quality of the multiple first signals, transmitting, from the UE to the BS, feedback information including the radio resource ID corresponding to the selected radio resource, and transmitting, from the BS to the UE, a second signal using the radio resource corresponding to the received radio resource ID.