Interference Variance Detection for Wireless Scheduling
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Solution Overview
Problem
In wireless communication networks, especially in heterogeneous deployments, interference variance due to Time Division Mode transmissions from macro and pico base stations causes bursty and varying interference levels, affecting user equipment at cell edges, and existing methods lack effective solutions to mitigate these interference issues without requiring extensive backhaul signaling or inter-node cooperation.
Innovation Solution
A method and apparatus that enable network nodes or user equipment to detect excessive interference variance and determine the transmission patterns causing this variance, allowing for scheduling adjustments to avoid interfering transmissions, thereby improving spectral efficiency without needing backhaul signaling or inter-node cooperation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If Time Division Mode transmissions are used from macro and pico base stations in heterogeneous networks, then interference management is simplified, but interference variance becomes bursty and varying, degrading user equipment performance at cell edges
Solution Approach 1:
The network node performs preliminary detection of transmission patterns causing interference variance before scheduling user equipment. By identifying these patterns in advance and adjusting scheduling accordingly, the system prevents performance degradation rather than reacting to it, resolving the contradiction between simplified interference management and maintained reliability
Solution Approach 2:
The system implements feedback by detecting interference variance and transmission patterns, then using this information to adjust scheduling decisions. This closed-loop approach allows the network to adapt to bursty interference from TDM transmissions while maintaining user equipment performance, balancing management simplicity with reliability
2Object-affected harmful factors
If existing interference mitigation methods are used, then some interference reduction is achieved, but they require extensive backhaul signaling and inter-node cooperation, increasing network complexity and overhead
Solution Approach 1:
The network node performs self-service by independently detecting transmission patterns and adjusting its own scheduling without requiring backhaul signaling or cooperation from other nodes. This autonomous approach reduces interference while minimizing network overhead, resolving the contradiction between interference reduction and network complexity
Solution Approach 2:
The invention extracts the essential function of interference mitigation from complex inter-node cooperation mechanisms and implements it locally at each network node through independent detection and scheduling adjustment. This eliminates the need for extensive backhaul signaling while maintaining interference reduction effectiveness
3Productivity
If scheduling adjustments are made to avoid interfering transmissions, then throughput and spectral efficiency are improved, but detection and response time are required, adding processing requirements
Solution Approach 1:
The network node uses universal detection mechanisms that identify transmission patterns across different scenarios and apply unified scheduling adjustments. This multi-functional approach handles various interference situations with a single detection-response framework, improving throughput while keeping processing requirements manageable through standardized procedures
Data Source
AI summary
In one aspect, the present invention provides methods and apparatuses for detecting that a wireless communication device in a serving cell is experiencing excessive interference variance, detecting a transmission pattern of interfering transmissions giving rise to such variance, and correspondingly adjusting scheduling of the device as a function of the detected transmission pattern, to at least partly avoid the interfering transmissions. An advantageous feature of such operation is that the determination of excessive interference variance and the determination of the transmission pattern associated with that varying interference can be done by a network node, e.g., the device's serving base station, or by the device, without requiring backhaul signaling or other inter-node cooperation in the network.