Omnidirectional Cell System Information Broadcasting
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Solution Overview
Problem
In mobile communications systems, particularly in 5G networks using high-frequency beams, the periodic broadcasting of system information leads to high system resource consumption due to directional beamforming, which is inefficient for omnidirectional coverage, resulting in increased overhead and resource usage.
Innovation Solution
A method and apparatus for broadcasting system information in a 5G or LTE system where a network device determines and broadcasts system information of a cell without a dedicated broadcast channel by using a second cell with omnidirectional coverage, allowing terminals to quickly obtain necessary information for cell access and reducing resource usage by sharing system information across cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beamforming technology is used to improve coverage in high-frequency 5G cells, then coverage is improved, but system resource consumption increases due to directional broadcasting requirements
Solution Approach 1:
The patent merges system information broadcasting from multiple cells into a single coordinated transmission. The first cell and second cell work together to broadcast system information, where the second cell provides omnidirectional coverage to compensate for the directional limitations of beamforming in the first cell, thereby reducing overall broadcasting resources while maintaining coverage.
Solution Approach 2:
The second cell is configured to provide dual functionality: it serves as a regular coverage cell while also functioning as a system information broadcasting cell with omnidirectional coverage. This multi-functionality allows system information to be broadcast efficiently without requiring dedicated omnidirectional resources in every cell.
2Ease of operation
If system information is broadcast periodically to ensure terminals can access the network, then terminal access is facilitated, but system resource overhead increases
Solution Approach 1:
The patent combines system information broadcasting operations across multiple cells, allowing the first cell and second cell to share the broadcasting burden. This merging reduces the total system resource overhead while ensuring terminals can still access network information through at least one of the cells.
3Adaptability or versatility
If omnidirectional coverage is implemented for system information broadcast, then all terminals can receive information, but resource consumption increases compared to directional beamforming
Solution Approach 1:
The second cell acts as an intermediary that provides omnidirectional coverage for system information broadcasting. Instead of requiring the first cell (which uses directional beamforming) to provide omnidirectional coverage, the second cell mediates this function, allowing the first cell to maintain its efficient directional approach while still achieving omnidirectional system information availability.
Data Source
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AI summary
A system information broadcasting method and apparatus, and a system information receiving method and apparatus are provided. The system information broadcasting method includes: determining, by a first network device, first system information of a first cell, where there is no broadcast channel in the first cell and no system information is broadcast; and broadcasting, by the first network device, the first system information in a second cell of the first network device.