LTE TDD Interference Measurement and Reporting
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Solution Overview
Problem
In wireless communication systems, especially in LTE TDD, uplink and downlink interference poses a significant challenge, limiting flexible allocation of transmission resources and potentially leading to loss of critical control information, which can disrupt the entire system operation.
Innovation Solution
A method and apparatus for measuring and reporting co-channel and cross-channel interference, providing channel state information to nodes, including average interference values, identities of interferers, and absolute/relative interference levels, to facilitate informed scheduling and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible uplink-downlink allocation is implemented in LTE TDD systems, then resource utilization and adaptability are improved, but interference between uplink and downlink transmissions increases
Solution Approach 1:
The patent segments the interference measurement process into two distinct parts: co-channel interference measurement (for same-direction transmissions) and cross-channel interference measurement (for opposite-direction transmissions). This segmentation allows the system to independently measure and report interference levels for different transmission scenarios, enabling more precise interference management while maintaining flexible uplink-downlink allocation.
Solution Approach 2:
The patent implements a feedback mechanism where user equipment measures and reports both co-channel and cross-channel interference levels to the base station. This feedback enables the base station to make informed scheduling decisions about uplink-downlink resource allocation, dynamically adjusting allocations to minimize interference while maintaining flexibility.
2Reliability
If interference measurement and reporting is implemented, then interference management capability is improved, but system complexity and measurement overhead increase
Solution Approach 1:
The patent divides the interference measurement functionality into separate measurement procedures for co-channel and cross-channel interference. This segmentation allows the system to selectively measure only the relevant interference type for each transmission scenario, reducing unnecessary measurement overhead while improving interference management reliability.
Solution Approach 2:
The patent enables user equipment to autonomously perform interference measurements and generate reports without requiring complex centralized coordination. Each user equipment independently measures the interference it experiences and reports the results, simplifying the overall system architecture while maintaining reliable interference management.
Data Source
AI summary
A method comprising: measuring separately co-channel interference and cross-channel interference at an apparatus; and providing, to a node, separate information regarding the co-channel interference and the cross-channel interference.