Hierarchical Radio Resource Allocation for Interference Management
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Solution Overview
Problem
Future radio access networks face challenges in managing radio resources efficiently to reduce interference and energy consumption, particularly in ultra-dense and mixed network topologies, where existing methods are inflexible, inefficient, and lack effective coordination between access points.
Innovation Solution
A method and device for radio resource allocation in a hierarchical network structure, where resource allocators can operate in autonomous or controlled modes, allowing flexible allocation of resources across layers to optimize energy, cost, and spectrum efficiency, adapting to changing network conditions and user mobility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of access points is increased to meet growing data demand, then network capacity and data rates improve, but interference and energy consumption increase
Solution Approach 1:
The patent segments the network into hierarchical layers with different resource allocation responsibilities. Upper layers manage macro-level resources while lower layers handle micro-level allocation, enabling coordinated interference management across the dense network through distributed decision-making at appropriate scales.
Solution Approach 2:
The patent implements dynamic resource allocation where access points can switch between autonomous and controlled modes based on network conditions. This dynamic adaptation allows the system to optimize performance and reduce interference by adjusting coordination levels in response to changing traffic patterns and interference conditions.
2Productivity
If hierarchical resource allocation is implemented to improve efficiency, then resource utilization improves, but system complexity increases
Solution Approach 1:
The patent divides resource allocation functionality into distinct hierarchical layers, with each layer responsible for specific allocation decisions. This segmentation allows complex allocation problems to be broken down into manageable sub-problems that can be solved independently at each layer, reducing overall system complexity while maintaining efficiency.
Solution Approach 2:
The patent enables lower-layer allocators to operate autonomously in certain modes, making self-service decisions without constant upper-layer intervention. This self-service capability reduces the coordination overhead and simplifies the control signaling required in hierarchical systems, thereby reducing system complexity.
3Ease of operation
If access points operate autonomously to reduce control overhead, then operational flexibility improves, but coordination and interference management become difficult
Solution Approach 1:
The patent implements dynamic mode switching where access points can transition between autonomous operation and controlled coordination based on network conditions. This dynamics allows the system to maintain operational flexibility when interference is low while activating coordination mechanisms when interference becomes problematic, thus resolving the contradiction between autonomy and interference management.
Solution Approach 2:
The patent changes the operational parameters of access points based on network conditions, adjusting the level of autonomy versus coordination. By dynamically modifying parameters such as transmission power, resource allocation patterns, and coordination intensity, the system can optimize both operational flexibility and interference management.
Data Source
AI summary
A method in a radio resource allocator of a radio access network is disclosed. The network comprises at least one first layer and at least one second layer, the first layer is higher than the second layer; and the method in a first radio resource allocator of the first layer comprises: decides if a second radio resource allocator of the second layer in an autonomous mode or in a controlled mode for at least one portion of available radio resources; when the second radio resource allocator in the autonomous mode, allocates the at least one portion of available radio resources to the second radio resource allocator; when the second radio resource allocator in the controlled mode, allocates the at least one portion of available resources to radio resource users of the radio resource users of the second radio resource allocator and/or radio resource allocators of a third lower layer.