Paging Reception Energy Efficiency in CIoT Devices
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Solution Overview
Problem
Current technologies, such as those specified in 3GPP Rel-13 and Rel-14, do not adequately address the energy efficiency of paging reception in CIoT devices, particularly in scenarios requiring low eDRX cycles for low-latency applications like smart bike rentals, where frequent cell reselections impact battery life due to unnecessary energy consumption during system information acquisition after cell reselection.
Innovation Solution
The proposed solution involves a network-side apparatus and method that determines and signals to devices whether page reception on a neighbor cell can be performed without acquiring system information, leveraging parameters indicating shared idle mode configurations and cell reselection parameters with the serving cell, allowing devices to skip system information acquisition during cell reselection and optimize energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CIoT devices perform system information acquisition after cell reselection to ensure reliable paging reception, then paging reception reliability is improved, but energy consumption increases
Solution Approach 1:
The network pre-configures CIoT devices with system information of neighbor cells before cell reselection occurs. This preliminary provision of information eliminates the need for devices to perform system information acquisition after reselecting to a neighbor cell, thereby maintaining paging reception reliability while significantly reducing energy consumption during frequent cell reselections
Solution Approach 2:
The serving cell broadcasts copied system information from neighbor cells through system information blocks. Devices can use these copied system information parameters (such as paging DRX cycle, paging occasion, and paging frame configuration) from the serving cell to monitor paging on neighbor cells without needing to acquire the actual neighbor cell system information, thus reducing energy consumption while ensuring reliable paging reception
2Speed
If eDRX cycle length is reduced to enable low-latency applications, then application responsiveness is improved, but paging reception energy consumption increases
Solution Approach 1:
By pre-configuring devices with neighbor cell system information including paging parameters, the network enables devices to immediately monitor paging on neighbor cells after reselection without performing additional acquisition procedures. This reduces the effective latency for paging reception in low eDRX cycle scenarios while reducing energy consumption by eliminating redundant system information acquisition operations
Solution Approach 2:
The serving cell provides copied paging configuration parameters from neighbor cells in its system information blocks. Devices can use these copied parameters to determine paging occasions and frames on neighbor cells, enabling fast paging reception for low-latency applications without the energy cost of acquiring actual neighbor cell system information
3Reliability
If CIoT devices frequently perform cell reselection to maintain optimal connection, then connection quality is improved, but battery life deteriorates due to repeated system information acquisition
Solution Approach 1:
The network performs preliminary configuration of neighbor cell system information in the serving cell before devices need to reselect. When devices perform frequent cell reselections to maintain optimal connection quality, they can immediately use the pre-provided system information to monitor paging on new cells without performing energy-consuming system information acquisition, thereby preserving battery life during frequent reselection operations
Solution Approach 2:
The serving cell broadcasts copied system information parameters from multiple neighbor cells. When devices reselect to neighbor cells, they can use these copied parameters (such as paging DRX cycle, paging occasion index, and paging frame configuration) to continue monitoring paging without acquiring the actual neighbor cell system information, thus maintaining connection quality while extending battery life during frequent reselections
Data Source
AI summary
A method and apparatus to determine by a network node of a serving cell of a communication network signaling including at least one parameter indicating that page reception on a paging channel of a neighbor cell can be performed by a network device without system information acquisition by the network device; and send the signaling toward the network device. Further, a method and apparatus to receive by a network device of a communication network from a serving cell signaling including at least one parameter indicating that page reception on a neighbor cell by a network device can be performed by the network device without system information acquisition by the network device; and based on the signaling, listen for a paging message on a paging channel associated with the neighbor cell without system information acquisition.