Shortened DRX Resource Allocation for Energy-Constrained Devices
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Solution Overview
Problem
Energy-constrained devices, such as automated guided vehicles (AGVs), face challenges in maintaining quality of service (QoS) while reducing energy consumption during network transmissions, leading to increased recharging frequency and decreased productivity.
Innovation Solution
Implementing shortened discontinuous reception (DRX) intervals and a network controller that greedily allocates transmission time slots to energy-constrained devices during their DRX ON duration, while balancing demands of other devices to ensure QoS fairness and minimize energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If energy-constrained devices use shortened DRX intervals to reduce energy consumption, then energy efficiency is improved, but the risk of QoS violations increases due to limited transmission opportunities
Solution Approach 1:
The network controller proactively identifies energy-constrained devices and pre-allocates transmission time slots during their DRX ON duration before QoS violations can occur. This preliminary resource allocation ensures that when devices need to transmit, dedicated slots are already reserved, eliminating the trade-off between energy saving and QoS reliability.
Solution Approach 2:
The patent applies differentiated resource allocation strategies tailored to individual device characteristics. Energy-constrained devices with shortened DRX intervals receive prioritized allocation during their limited ON windows, while other devices receive standard allocation. This localized quality adjustment ensures each device gets appropriate service level based on its energy constraints and QoS needs.
2Use of energy by moving object
If the network controller greedily allocates transmission time slots to energy-constrained devices, then energy efficiency is improved, but QoS fairness among all devices may be compromised
Solution Approach 1:
The network controller implements partial greedy allocation by reserving only the necessary transmission slots during DRX ON windows for energy-constrained devices, rather than allocating all available slots. This partial action ensures energy-constrained devices receive adequate service during their limited windows while leaving sufficient resources for other devices during their allocation windows, thereby maintaining QoS fairness.
Solution Approach 2:
The resource allocation strategy dynamically adjusts based on real-time DRX state information. The network controller continuously monitors which devices are in DRX ON state and dynamically allocates slots accordingly, changing allocation patterns from static to dynamic. This dynamic approach ensures energy-constrained devices get prioritized when needed without permanently disadvantaging other devices, balancing energy efficiency and fairness.
Data Source
AI summary
The described technology is generally directed towards network resource allocation for energy constrained devices. Energy constrained devices can use shortened discontinuous reception (DRX) intervals to reduce their energy consumption. In order to provide adequate quality of service (QoS) to energy constrained devices using shortened DRX intervals, a network controller can use the disclosed techniques to greedily allocate available transmission time slots to devices using shortened DRX intervals. The network controller can also apply the disclosed techniques to balance demands of other devices by allocating some transmission time slots to the other devices.