Dynamic Subframe Scheduling for Wireless Interference Management
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Solution Overview
Problem
In heterogeneous wireless communication networks, interference from macro access nodes at the cell edge of short-range, low-power access nodes leads to undesirable reductions in coverage and throughput for wireless devices, and existing scheduling schemes like ABS limit resource allocation.
Innovation Solution
A scheduling scheme is implemented with a first and second subframe, where the first access node communicates with wireless devices during the first subframe and transmits data during the second subframe only if interference criteria are met, while the second access node communicates with devices meeting signal condition thresholds during the respective subframes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ABS subframes are used to create interference-free opportunities for wireless devices at cell edge, then coverage and throughput are improved, but resource allocation is limited
Solution Approach 1:
The patent implements dynamic subframe allocation where the network node can flexibly assign different subframes as ABS subframes based on real-time interference conditions and resource requests. Instead of a fixed ABS pattern, the system dynamically adjusts which subframes provide interference-free transmission opportunities, allowing optimal resource allocation while maintaining coverage and throughput improvements for cell edge devices.
2Object-affected harmful factors
If the first access node transmits data during the second subframe, then interference from the macro access node is avoided, but resource utilization efficiency decreases
Solution Approach 1:
The patent applies local quality by providing different transmission opportunities to different wireless devices based on their specific interference conditions. Wireless devices experiencing interference from macro access nodes receive data during the second subframe (interference-free period), while devices not affected by interference can receive data during the first subframe. This localized approach ensures interference avoidance for affected devices while maximizing overall resource utilization efficiency.
3Reliability
If resource requests are processed dynamically based on interference indications, then coverage and throughput are improved, but scheduling complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where wireless devices report interference indications to the network node, which then uses this feedback to dynamically determine ABS subframe allocation and resource assignment. The network node processes resource requests in conjunction with interference indications to make informed scheduling decisions. This feedback-driven approach improves coverage and throughput for affected devices while managing scheduling complexity through structured information exchange and decision-making protocols.
Data Source
AI summary
A system and method of scheduling communication in a wireless communication network are provided. A scheduling scheme comprising a first and second subframe can be determined to communicate data between a first access node and first wireless devices, and a second access node and second wireless devices. A resource request from a network node can be received. An interference indication of the one of the first wireless devices can be determined after receiving the resource request. The first access node can be instructed to transmit data addressed to the one of the first wireless devices during the second subframe when the interference indication of the one of the first wireless devices meets an interference criteria. The second access node can be instructed to transmit data addressed to at least one of the second wireless devices that meets the signal condition threshold during the second subframe of the scheduling scheme.