Dynamic Resource Allocation for Wireless Network Reliability
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Solution Overview
Problem
In wireless networks, especially in LTE and 5G systems, user devices often contend for resources, leading to collisions and decreased system reliability due to insufficient resource allocation techniques, particularly for ultra-reliable low-latency communications (URLLC) applications which require high reliability and low latency.
Innovation Solution
A method is introduced to dynamically allocate resources using either scheduling-based or contention-based access in wireless networks, depending on the availability of resources relative to the number of connected user devices, with scheduling-based allocation for sufficient resources and contention-based allocation when resources are scarce, incorporating transmission diversity to enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If contention-based resource access is used in wireless networks, then resource allocation flexibility is improved, but system reliability deteriorates due to collisions between user devices
Solution Approach 1:
The system dynamically switches between scheduling-based and contention-based resource allocation modes based on real-time network conditions. The base station determines the number of available resources and connected user devices, then adaptively selects the appropriate allocation mode (scheduling-based when resources are sufficient, contention-based when resources are scarce), thereby resolving the contradiction between flexibility and reliability
Solution Approach 2:
The system changes the resource allocation parameter (mode selection) based on the ratio of available resources to connected user devices. When the ratio is favorable, scheduling-based allocation is used for high reliability; when the ratio is unfavorable, contention-based allocation provides flexibility. This parameter change approach allows the system to optimize between reliability and flexibility according to current network state
2Reliability
If scheduling-based resource allocation is used, then system reliability is improved, but resource allocation flexibility deteriorates when resources are scarce
Solution Approach 1:
The system dynamically adjusts the resource allocation mode based on the availability of resources relative to the number of connected user devices. When resources are sufficient, scheduling-based allocation ensures high reliability; when resources are scarce, the system transitions to contention-based allocation to maintain flexibility, thus resolving the contradiction between reliability and flexibility
3Quantity of substance
If resources are allocated to support more user devices, then network capacity is improved, but collision probability increases leading to decreased reliability
Solution Approach 1:
The base station continuously monitors the number of connected user devices and available resources, then dynamically selects the allocation mode. When the number of user devices exceeds available resources, contention-based allocation is used to accommodate more devices while managing collision risks; when resources are sufficient, scheduling-based allocation ensures high reliability, thus resolving the contradiction between capacity and reliability
Data Source
AI summary
A technique includes determining a number of available resources for a category of user devices, determining a number of user devices, within the category of user devices, that are connected to a base station, determining whether the number of available resources is greater than or equal to the number of connected user devices, allocating resources to one or more user devices within the category of user devices using a scheduling-based resource allocation if the number of available resources for the category is greater than or equal to the number of connected user devices within the category of user devices, and otherwise, allocating resources to one or more user devices within the category of user devices using a contention-based resource allocation if the number of available resources for the category is less than the number of connected user devices within the category of user devices.