Adaptive Channel Sensing Threshold for Wireless Systems
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Solution Overview
Problem
Existing wireless communication systems face challenges in adapting the channel sensing threshold effectively, particularly when switching between omni-directional and directional antenna configurations, which can impact the efficiency of channel access in shared spectrum scenarios.
Innovation Solution
The proposed solution involves a base station (BS) and user equipment (UE) that determine whether the antenna configuration for channel sensing is omni-directional or directional, and then adapt the channel sensing threshold accordingly. The threshold is composed of two parts: a common part for both configurations and a part specific to the antenna configuration, allowing for optimized channel sensing based on the antenna setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed channel sensing threshold is used for both omni-directional and directional antenna configurations, then the system complexity is reduced, but the channel sensing efficiency deteriorates
Solution Approach 1:
The channel sensing threshold is segmented into two distinct parts: a common threshold applicable to both omni-directional and directional antenna configurations, and a configuration-specific threshold offset that is added only when directional antenna configuration is detected. This segmentation allows the system to maintain simplicity while improving sensing efficiency for directional modes.
Solution Approach 2:
The channel sensing threshold is made dynamic by adjusting it based on the detected antenna configuration. The system dynamically selects between using only the common threshold (for omni-directional mode) or the common threshold plus configuration-specific offset (for directional mode), allowing optimal performance adaptation without increasing overall system complexity.
2Productivity
If the channel sensing threshold is optimized for directional antenna configuration, then the channel sensing efficiency for directional mode is improved, but the performance for omni-directional mode may deteriorate
Solution Approach 1:
The threshold optimization is applied locally only to directional antenna configurations through a configuration-specific offset, while the common threshold remains unchanged for omni-directional mode. This ensures that directional mode benefits from optimized sensing without negatively impacting omni-directional performance.
Solution Approach 2:
The system changes the threshold parameter dynamically based on antenna configuration detection. When directional configuration is detected, a specific offset is added to the common threshold; when omni-directional configuration is detected, only the common threshold is used. This parameter adaptation ensures optimal performance for each mode without compromising the other.
Data Source
AI summary
Methods and apparatuses for adapting a channel sensing threshold in a wireless communication system operating with shared spectrum channel access. A method for operating a base station (BS) includes determining whether an antenna configuration for channel sensing is omni-directional or directional and determining a channel sensing threshold. The channel sensing threshold includes two parts: a first part of the channel sensing threshold being common for omni-directional and directional antenna configurations and a second part of the channel sensing threshold depending on the antenna configuration. The method further includes performing a channel sensing procedure based on the antenna configuration and the channel sensing threshold and transmitting downlink (DL) data over a channel based on the channel being sensed as idle in the channel sensing procedure.