Synchronous Beam Sending Method for 5G Mobility and SNR
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Solution Overview
Problem
Conventional synchronization beam scanning methods in high-frequency mobile communication systems face challenges in balancing mobility and signal-to-noise ratio (SNR), as wide beams offer better mobility but lower SNR, while medium beams provide higher SNR but at the cost of increased overhead and poorer mobility.
Innovation Solution
A method where a network device simultaneously sends wide and medium beams during synchronization beam sweeping, using different beam sets with non-overlapping widths to cover a spatial range, ensuring both mobility and SNR requirements are met by using a wide beam for line-of-sight scenarios and a medium beam for non-line-of-sight scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wide beams are selected for synchronization beam scanning, then anti-mobility and overhead are improved, but signal-to-noise ratio deteriorates
Solution Approach 1:
The patent divides the beam scanning process into two distinct stages: a first stage using wide beams for initial coverage and mobility support, and a second stage using narrow beams for high-quality signal establishment. This segmentation allows each beam type to perform its optimal function without compromise
Solution Approach 2:
The patent implements periodic beam switching between wide and narrow beams across multiple subframes. The network device alternates between transmitting wide beams in earlier subframes and narrow beams in later subframes, creating a periodic pattern that balances mobility and signal quality requirements
2Reliability
If narrow beams are selected for synchronization beam scanning, then signal-to-noise ratio is improved, but overhead and complexity increase
Solution Approach 1:
The patent segments the beam scanning process into two stages, using wide beams in the first stage to reduce the overall number of beams needed, thereby reducing overhead. Narrow beams are then used in the second stage only for beams that require high signal quality, minimizing the impact on system complexity
Solution Approach 2:
The patent uses periodic beam switching where narrow beams are transmitted only in specific later subframes after wide beams have established initial coverage. This periodic approach limits the total number of narrow beam transmissions required, reducing overhead while maintaining signal quality where needed
Data Source
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AI summary
This application provides a synchronization beam sending and receiving method, a network device, a terminal, and a system. The synchronization beam sending method includes: sending, by a network device, at least one first subframe to a terminal, where the at least one first subframe includes at least one first beam identifier and at least one second beam identifier, a first beam corresponding to the first beam identifier is a beam in a first beam set, a second beam corresponding to the second beam identifier is a beam in a second beam set, an intersection set of the first beam set and the second beam set is empty, and the first beam identifier and the second beam identifier are different. In this application, the network device sends different beams in two different sets to the terminal, so that fewer beams are used in beam scanning, anti-mobility is desirable, and an SNR can also be ensured.