Wireless Network Resource Coordination for Interference Reduction
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Solution Overview
Problem
In Ultra-Dense Networks (UDNs), interference between adjacent or overlapping networks operating on the same or overlapping radio resources leads to reduced wireless link quality, especially when terminal devices move across different operator coverage areas, due to the lack of efficient resource scheduling coordination.
Innovation Solution
A method and apparatus for coordinating resource scheduling between UDNs by receiving resource coordination requests, performing scheduling of interfered and interfering wireless links based on interference thresholds, and transmitting coordinated schedulable resource messages to schedule orthogonal radio resources, using graph coloring algorithms to determine orthogonal schedulable resources and release resources when interference falls below thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple UDNs operate on the same or overlapping radio resources to maximize bandwidth utilization, then spectrum efficiency is improved, but interference between networks increases
Solution Approach 1:
The patent implements dynamic resource scheduling where the coordination node continuously monitors interference levels and adjusts the schedulable resource sets for different UDNs in real-time. This allows the system to adaptively balance spectrum utilization and interference management based on current network conditions, rather than using static resource allocation.
Solution Approach 2:
The patent introduces a coordination node as an intermediary entity that manages resource allocation between multiple UDNs. This mediator receives scheduling requests from different networks, determines orthogonal schedulable resources, and coordinates transmissions to minimize inter-network interference while maximizing overall spectrum efficiency.
2Reliability
If resource coordination coordination is implemented between UDNs to reduce interference, then wireless link quality is improved, but system complexity increases
Solution Approach 1:
The coordination node serves as a centralized intermediary that handles the complex coordination tasks, isolating the complexity from individual UDNs. Each UDN only needs to communicate scheduling requests and receive coordinated resource allocations from the coordination node, simplifying their own scheduling complexity while achieving improved link quality through centralized coordination.
Solution Approach 2:
The system implements feedback mechanisms where the coordination node monitors interference levels and transmission outcomes, then adjusts the schedulable resource allocations accordingly. This feedback loop enables the system to maintain optimal wireless link quality by dynamically responding to changing network conditions without requiring complex decentralized coordination protocols.
3Reliability
If orthogonal schedulable resources are assigned to interfering links to eliminate interference, then link reliability is improved, but resource utilization efficiency decreases
Solution Approach 1:
The patent implements dynamic resource allocation where the set of orthogonal schedulable resources is not fixed but continuously adjusted based on interference measurements and network conditions. This allows the system to achieve reliable link performance when needed while maximizing resource utilization during periods of low interference, avoiding the inefficiency of permanently allocating orthogonal resources.
Solution Approach 2:
The system applies orthogonal resource allocation selectively rather than universally. The coordination node determines the degree of orthogonality needed based on actual interference levels, applying full orthogonality only when interference exceeds thresholds. This partial application of the principle maintains link reliability when necessary while preserving resource utilization efficiency during normal operating conditions.
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AI summary
Methods and apparatuses for coordinating resource scheduling between wireless networks are provided. The method comprises receiving a resource coordination request message from at least one wireless network, wherein the resource coordination request message includes identifiers of at least one pair of wireless links which include an interfered wireless link in the at least one wireless network and an interfering wireless link in a second wireless network. The method also comprises performing coordination about schedulable resources for the interfered wireless link and the interfering wireless link based on the resource coordination request message. The method further comprises transmitting a coordinated schedulable resource message to the at least one wireless network and the second wireless network such that at least one of the interfered wireless link and the interfering wireless link is scheduled according to the coordinated schedulable resource message. With the methods and apparatuses of the present disclosure, the interference taking place between wireless networks can be avoided or at least reduced by coordinating resource scheduling.