Dynamic Energy Detection Threshold Design for Wireless Channel Access
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in determining the energy detection threshold (ED threshold) for user equipment (UE) and base stations, which can lead to reduced channel access probability due to fixed thresholds not considering transmission characteristics, channel types, or priority levels, resulting in inefficient resource allocation and potential interference.
Innovation Solution
The method involves determining the ED threshold based on characteristics such as service type, channel type, transmission priority, and actual transmission power, allowing UE and base stations to dynamically adjust their energy detection thresholds to improve channel access probability by considering specific transmission scenarios and priorities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed ED threshold based on maximum transmit power is used, then the threshold determination is simple, but the channel access probability is reduced due to lack of adaptation to transmission characteristics
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed ED threshold to a dynamic threshold that adapts based on transmission characteristics. The base station configures different ED thresholds for uplink and downlink transmissions, and the UE adjusts thresholds based on service type, channel type, and transmission priority, allowing the system to respond flexibly to varying conditions rather than using a static maximum power-based threshold
Solution Approach 2:
The patent implements parameter changes by modifying the ED threshold value based on multiple transmission parameters including service type (eMBB, mMTC, URLLC), channel type (licensed, unlicensed, sidelink), transmission priority, and actual transmission power. This allows the threshold to be optimized for each specific transmission scenario rather than using a single fixed value
2Device complexity
If a single ED threshold is configured for all transmissions, then the configuration is simple, but resource allocation efficiency is reduced due to inability to account for different service priorities
Solution Approach 1:
The patent applies local quality by assigning different ED threshold values to different transmission types and service categories. Instead of a uniform threshold, the system configures specific thresholds for uplink versus downlink, and further differentiates within each direction based on service type (eMBB, mMTC, URLLC) and channel type, allowing each transmission to have optimized parameters suited to its specific requirements
Solution Approach 2:
The patent segments the ED threshold configuration into multiple categories: uplink thresholds and downlink thresholds, with each further divided by service type (eMBB, mMTC, URLLC) and channel type (licensed, unlicensed, sidelink). This segmentation allows the system to manage complexity through structured categorization while achieving fine-grained optimization for different transmission scenarios
3Device complexity
If the ED threshold is determined without considering actual transmission power, then the determination process is simpler, but interference management is less effective
Solution Approach 1:
The patent implements feedback by having the UE determine its actual transmission power based on power control parameters received from the base station, then use this actual power information to adjust the ED threshold selection. The base station also provides feedback through RRC configuration to set appropriate thresholds based on network conditions and interference levels, creating a closed-loop system that adapts to actual transmission conditions
Data Source
AI summary
Aspects presented herein may enhance the determination of ED threshold to improve the channel access probability of the UE and the base station. In one aspect, a UE or a base station determines an ED threshold for a transmission, where the ED threshold is based on a characteristic of the transmission, a channel, or the UE/base station excluding a maximum transmit power of the UE or the base station. The UE or the base station determines whether an energy on the channel is less than the determined ED threshold. The UE or the base station transmits on the channel when the energy is determined to be less than the ED threshold.