Conditional DRX Paging for Wireless UE Energy Efficiency
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Solution Overview
Problem
Current wireless communication systems face challenges in extending battery life and maintaining charge for reduced capability user equipment (UEs) due to inefficient power management, particularly during RRC Resume procedures, which are exacerbated by resource overload and channel degradation.
Innovation Solution
Implementing a conditional device paging DRX mechanism that dynamically adjusts the number of paging frames and occasions based on network and device context, allowing the network node to broadcast DRX switch messages to adjust the DRX cycle, thereby reducing unnecessary power consumption and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network node sends paging messages frequently to ensure reliable delivery to UEs, then the reliability of communication is improved, but the energy consumption of UEs increases and battery life decreases
Solution Approach 1:
The patent applies dynamics by making the DRX cycle length adjustable based on network conditions. The network node can dynamically switch between a first DRX cycle (shorter, for reliable communication) and a second DRX cycle (longer, for energy saving) depending on whether the network is in a reduced resource state or not, allowing the system to adapt between reliability and energy consumption requirements
Solution Approach 2:
The patent changes the DRX cycle parameter based on network resource availability. When the network is not in a reduced resource state, it uses a first DRX cycle parameter value that ensures reliable paging delivery. When in a reduced resource state, it switches to a second DRX cycle parameter value that reduces UE energy consumption while maintaining acceptable service quality
2Reliability
If the network node increases the number of paging frames and occasions to improve service quality, then the reliability of paging delivery is improved, but the resource congestion and channel degradation worsen
Solution Approach 1:
The patent dynamically adjusts the number of paging frames and occasions based on network resource availability. When resources are sufficient, the network can configure more paging occasions to improve delivery reliability. When in a reduced resource state, it reduces the number of paging occasions to alleviate resource congestion and channel degradation, preventing harmful effects from worsening
3Loss of time
If the UE monitors paging messages more frequently to ensure timely reception, then the response time is improved, but the battery life and charge maintenance deteriorate
Solution Approach 1:
The patent makes the DRX cycle duration dynamic based on network conditions. When the network is not in a reduced resource state, the UE uses a first DRX cycle with shorter monitoring intervals that reduces paging response time. When the network enters a reduced resource state, the UE switches to a second DRX cycle with longer intervals that extends battery life while still maintaining acceptable response times for critical services
Data Source
AI summary
Various techniques are provided for a method including broadcasting, by a network node, a discontinuous reception (DRX) switch message indicating a user equipment (UE) is to switch from a first DRX cycle to a second DRX cycle and determining, by the network node, whether to send a paging message to the UE using one of the first DRX cycle or the second DRX cycle. The method can further include determining, by the network node, that the network node is in a reduced resource state.