Dynamic Guard Period Configuration for Wireless Beam Switching
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Solution Overview
Problem
In broadband communications systems, the need for a guard period to prevent inter-symbol interference due to beam switching in wireless networks reduces available air interface resources, thereby decreasing system capacity and resource utilization.
Innovation Solution
A method to dynamically configure the guard period based on hardware switching location and time, allowing for adaptive configuration across different cells, eliminating the need for an extra guard period and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an extra guard period is reserved before each symbol to accommodate beam switching time, then beam switching can be performed without affecting normal sending or receiving, but air interface resource utilization decreases and system capacity is reduced
Solution Approach 1:
The patent applies dynamics by making the guard period configuration adaptive rather than fixed. The base station dynamically determines whether to configure a guard period based on real-time beam switching requirements, switching between guard period configurations (first guard period for beam switching, second guard period for normal operation) to optimize resource utilization while ensuring reliable beam switching when needed
Solution Approach 2:
The patent changes the parameter of guard period configuration from a static requirement to a dynamic parameter. By adjusting the guard period configuration based on beam switching location and time requirements, the system can reduce guard period overhead when beam switching is not needed, thereby improving air interface resource utilization while maintaining reliability when beam switching occurs
2Reliability
If a fixed guard period is configured for all symbols, then beam switching can be accommodated, but available air interface resources are reduced
Solution Approach 1:
The patent applies local quality by differentiating guard period configurations based on specific locations and conditions. Instead of a uniform guard period for all symbols, the system configures a first guard period specifically at locations where beam switching occurs, while using a second guard period (or no guard period) at locations where beam switching does not occur, thereby optimizing resource allocation locally
3Ease of manufacture
If multiple cells use uniform frame structure design, then implementation is simplified, but adaptability to different hardware switching locations is reduced
Solution Approach 1:
The patent makes the frame structure dynamic by allowing different cells to configure guard periods differently based on their specific hardware switching locations. The base station can select from multiple guard period configurations (first guard period at hardware switching location, second guard period elsewhere) to adapt the frame structure to local requirements while maintaining overall system coherence
Data Source
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AI summary
Embodiments of the present invention disclose a data symbol transmission method and a wireless network device. The wireless network device includes: an information determining unit, configured to determine a location at which hardware switching needs to be performed in a current subframe and switching time of the hardware switching; a configuration unit, configured to configure, according to the switching time, a first guard period for a first data symbol corresponding to the location, where a length of the first guard period is greater than or equal to that of the switching time; where the configuration unit is further configured to: use, as a second data symbol, a data symbol in the subframe other than the first data symbol, and configure a second guard period for the second data symbol; and a sending unit, configured to send the subframe to another wireless network device. Resource utilization can be improved, and a system capacity can be increased by using this solution.