Bursty Interference Handling in Shared Spectrum
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Bursty interference in shared radio frequency spectrum bands leads to data loss and inefficient operation in wireless communication systems, causing decoding failures and undesirable effects on outer loop link adaptation, where unaccounted interference can result in prolonged reduced modulation and coding schemes even after interference subsides.
Innovation Solution
User equipment (UE) and base stations can determine and adapt to bursty interference by modifying feedback messages and transmission schedules, allowing for dynamic link adaptation and scheduling adjustments based on interference patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uncoordinated transmissions are allowed in a shared radio frequency spectrum band to increase data transmission capacity, then service coverage and capacity are improved, but interference between nodes operating with different radio technologies occurs
Solution Approach 1:
The patent implements feedback mechanisms where user equipment (UE) reports channel quality indicators (CQI) and interference measurements to the base station. The base station uses this feedback to dynamically adjust modulation and coding schemes (MCS) and transmission parameters, enabling coordinated operation in the shared spectrum band while maintaining high data transmission capacity.
2Reliability
If bursty interference is detected and the base station reduces the modulation and coding scheme (MCS) to ensure reliable communication, then communication reliability is improved, but data transmission efficiency deteriorates when the interference subsides
Solution Approach 1:
The patent employs dynamic link adaptation where the base station continuously monitors interference conditions and adjusts MCS, transmission power, and resource allocation in real-time. When bursty interference is detected, the system reduces MCS to maintain reliability; when interference subsides, the system rapidly increases MCS to restore optimal data transmission efficiency, ensuring both reliability and productivity are maintained across varying conditions.
Solution Approach 2:
The system dynamically changes transmission parameters including modulation order, coding rate, transmit power, and resource block allocation based on detected interference conditions. These parameter adjustments allow the system to adapt to bursty interference events, maintaining communication reliability during interference while maximizing data transmission efficiency when conditions are favorable.
3Stability of the object's composition
If the base station operates under a reduced MCS long after bursty interference subsides to maintain reliability, then communication stability is improved, but system efficiency and resource utilization deteriorate
Solution Approach 1:
The patent implements continuous feedback monitoring where the base station receives ongoing CQI reports and interference measurements from user equipment. This feedback mechanism enables the base station to detect when interference has subsided and promptly adjust MCS and other transmission parameters upward, preventing prolonged operation at reduced efficiency while maintaining communication stability through controlled adaptation.
Solution Approach 2:
The system performs preliminary interference detection and assessment to anticipate interference events before they significantly impact communication. By detecting interference patterns early and proactively adjusting transmission parameters, the system can maintain stability during interference events and rapidly recover efficiency once interference subsides, rather than reacting too late and operating at reduced capacity for extended periods.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Techniques are described for wireless communication. A first method includes determining, at a user equipment (UE), that the UE is exposed to a bursty interference in a shared radio frequency spectrum band, and modifying, based at least in part on the bursty interference, a feedback message reporting by the UE to a base station. A second method includes determining, at a base station, that a UE is exposed to a bursty interference in a shared radio frequency spectrum band, and modifying, based at least in part on the bursty interference, one or more of: a link adaptation for the UE or a transmission schedule for the UE.