Radio Resource Allocation via Multi-Layer Scheduling Loops
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Solution Overview
Problem
In wireless communication systems using mmW-RAT, existing resource allocation methods struggle to efficiently schedule and allocate radio resources among multiple candidate radio links, particularly at high frequency bands where signal attenuation and interference complicate the determination of which link should use which resources, especially for opportunistic/shared-type and unused-type resources.
Innovation Solution
Implementing a resource-type specific scheduling loop scheme at network nodes, where multiple scheduling loops are performed to allocate different types of radio resources to selected radio links, with each loop associated with specific resource types, and scheduling priorities calculated based on coefficients such as traffic handling, channel quality, fairness, delay, and minimum rates, considering previous scheduling results to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple heterogeneous layers and high frequency bands are used to enhance wireless capacity, then data transmission capacity and bandwidth are improved, but signal attenuation and interference increase
Solution Approach 1:
The patent segments the wireless network into multiple heterogeneous layers (macro cells, micro cells, pico cells, femto cells) operating at different frequency bands. Each layer handles specific traffic types and coverage areas, allowing the system to exploit the high capacity of mmW frequencies for short-range communications while using lower frequencies for broader coverage, thus achieving high wireless capacity while managing signal attenuation through layered architecture
Solution Approach 2:
The patent introduces a vertical dimension to resource allocation by implementing multi-layer scheduling across different frequency bands and cell types. The scheduling system operates in multiple dimensions (frequency, space, time, layer) simultaneously, allocating resources not just in the traditional time-frequency domain but also across heterogeneous network layers, thereby achieving high capacity while mitigating attenuation effects through dimensional diversity
2Adaptability or versatility
If scheduled MAC approach is used for resource allocation, then resource allocation flexibility is improved, but difficulty in determining resource allocation for multiple radio links increases
Solution Approach 1:
The patent segments the scheduling process into multiple independent scheduling instances, each responsible for a specific radio link or layer. The overall scheduling problem is divided into sub-problems that can be solved independently and in parallel, reducing the complexity of determining resource allocation across multiple radio links while maintaining flexibility through coordinated execution of these segmented scheduling decisions
Solution Approach 2:
The patent introduces a centralized controller or coordination mechanism that acts as an intermediary between multiple scheduling instances and the radio resources. This intermediary collects scheduling decisions from different layers, resolves conflicts, and ensures optimal resource allocation across the heterogeneous network, thereby managing the complexity of multi-radio link scheduling while preserving allocation flexibility
3Productivity
If opportunistic/shared-type resources are used to boost user data rate, then data transmission rate is improved, but interference among neighboring radio links increases
Solution Approach 1:
The patent applies local quality by allowing opportunistic/shared-type resources to be used selectively in specific local contexts rather than globally. The scheduling system determines which radio links can safely share resources based on local interference conditions, spatial separation, and channel characteristics, enabling high data rates in favorable locations while preventing interference in sensitive areas through localized resource sharing policies
Data Source
AI summary
Disclosed are methods and network nodes for allocating resources for multiple radio links in a wireless communication system. The method may include successively performing each of multiple scheduling loops such that the resources with one or more of multiple resource types are allocated to one or more radio links selected from the multiple radio links, wherein each of the multiple scheduling loops is associated with the one or more of multiple types of the resources. With the proposed methods and network nodes, radio resources of different types may be effectively and efficiently allocated to multiple radio links through multiple scheduling loops and utilization efficiency of the resources could be notably boosted.