Wireless Scheduling Scheme for Cell Edge Interference
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Solution Overview
Problem
In heterogeneous wireless communication networks, interference from macro access nodes at the cell edge of short-range access nodes leads to reduced coverage and throughput for wireless devices, and existing scheduling schemes like ABS can compromise macro access node capacity.
Innovation Solution
A scheduling scheme is implemented where a first access node determines subframes and resource blocks for data transmission, refraining from transmitting data to devices at the cell edge during specific resource blocks to minimize interference, and instructs adjacent access nodes to adjust data allocation based on signal condition thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ABS scheduling scheme is used to protect cell edge devices, then coverage and throughput for cell edge devices is improved, but macro access node capacity is reduced
Solution Approach 1:
The patent applies local quality by differentiating resource allocation based on device location and signal conditions. Cell edge devices receive protected resources during ABS subframes, while devices with better signal conditions can utilize both ABS and non-ABS resources. This localized approach ensures that interference protection is applied only where needed (at cell edges) rather than uniformly across all devices, thereby maintaining macro capacity while improving cell edge performance.
Solution Approach 2:
The patent implements dynamic resource allocation where the scheduling scheme adapts based on real-time signal conditions and device requirements. The system dynamically determines which devices qualify for ABS protection based on signal strength thresholds and continuously adjusts resource allocation to balance cell edge protection with macro capacity utilization. This dynamic approach allows the system to optimize the trade-off between coverage and capacity based on current network conditions.
2Object-affected harmful factors
If more ABS subframes are allocated to protect cell edge devices, then interference reduction is improved, but macro access node capacity is reduced
Solution Approach 1:
The patent applies partial action by allocating ABS subframes selectively rather than universally. Only a portion of subframes are designated as ABS, and only devices meeting specific signal condition thresholds receive ABS protection. This partial approach provides sufficient interference reduction for cell edge devices while preserving macro capacity during non-ABS subframes, avoiding the excessive action of protecting all devices at all times.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the ABS subframe allocation ratio and signal strength thresholds based on network conditions. The system can modify the number of ABS subframes, the threshold values for device qualification, and the resource block allocation to dynamically balance interference reduction with capacity maintenance. These parameter adjustments allow optimization of the trade-off between harmful factor reduction and productivity.
Data Source
AI summary
A system and method of scheduling communication in a wireless communication network are provided. An access node can determine a scheduling scheme based on an indication of data addressed to wireless devices. The scheduling scheme can comprise a first subframe and a second subframe comprising a first and second resource block. The scheduling scheme can be communicated. Data addressed to the wireless devices in communication with a first access node can be transmitted during the first subframe and the first resource block of the second subframe. A second access node can be instructed to assign data addressed to wireless devices that meet a signal condition threshold to be transmitted during the second resource block of the second subframe and to assign data addressed to wireless devices that do not meet the signal condition threshold to be transmitted during the first subframe and the first resource block of the second subframe.