Duty Cycle Management for Cellular Network Resource Allocation
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Solution Overview
Problem
In duty cycle limited cellular networks, existing technologies face challenges in optimizing radio resource usage and spectral efficiency due to strict activity duty cycle restrictions, which can lead to inefficient traffic distribution and reduced quality of service.
Innovation Solution
The proposed solution involves a network-based method that redirects User Equipment (UE) to neighboring base stations or frequency bands with more available duty cycle budget, and broadcasts duty cycle status information to UEs for optimal cell selection or reselection, thereby optimizing radio resource usage and improving spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If UEs are served by a base station with limited duty cycle budget, then the base station can maintain its transmission schedule, but spectral efficiency is reduced due to traffic concentration on restricted resources
Solution Approach 1:
The network segments the UE population based on duty cycle budget availability. UEs are divided into groups served by different base stations or cells, where each segment is assigned to a node with appropriate duty cycle capacity. This segmentation allows traffic to be distributed across multiple nodes with varying duty cycle budgets, improving overall spectral efficiency while respecting individual node constraints.
Solution Approach 2:
The invention introduces an additional dimension for resource allocation by utilizing multiple frequency bands with different duty cycle regulations. Instead of being constrained to a single band, the system can allocate UEs to different frequency bands (e.g., band 54 with 10% duty cycle vs. band 47b with 2.5% duty cycle), effectively transforming a one-dimensional time-based constraint into a multi-dimensional resource space that includes frequency and time.
2Use of energy by moving object
If UEs remain in idle mode to conserve power, then device energy consumption is reduced, but network performance deteriorates due to delayed connection establishment
Solution Approach 1:
The network provides feedback to UEs about the duty cycle status and availability of target cells through broadcast system information. This feedback mechanism enables UEs to make informed decisions about when to transition from idle to connected mode, allowing them to conserve power by remaining idle when suitable target cells are unavailable, while quickly establishing connections when duty cycle budget becomes available.
Solution Approach 2:
The network performs preliminary actions by pre-identifying and broadcasting information about suitable target cells that have available duty cycle budget. This allows UEs in idle mode to have advance knowledge of where to connect when needed, reducing the delay associated with connection establishment while still allowing them to remain in power-saving idle mode when appropriate.
3Productivity
If the network redirects UEs to neighbor cells with better duty cycle budget, then spectral efficiency improves through better resource utilization, but device complexity increases due to additional signaling and cell reselection procedures
Solution Approach 1:
The invention enables UEs to perform self-service in the cell reselection process by autonomously evaluating broadcast duty cycle status information and independently selecting appropriate target cells. Instead of requiring complex network-controlled redirection procedures, UEs use the provided system information to make their own connection decisions, significantly reducing signaling overhead and device complexity while achieving the same spectral efficiency improvements.
Data Source
AI summary
A network-based method allows a network to optimize its control of radio resource usage by directing connected and idle mode User Equipment (UEs) (10) to another network node, e.g. a neighbor cell, having a better duty cycle, or by configuring the UEs to use another frequency band served by the same network node or a different network node. Signaling its duty cycle budget to the UEs allows the UEs to optimize their idle mode operation by performing cell reselection to a network node which has a better duty cycle budget.