Cell Reselection Using Slice and CAG Support Information
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Solution Overview
Problem
In wireless networks, user devices face inefficiencies in conserving battery power during idle or inactive states due to unnecessary signal measurements on cells that do not support the network slice or closed access group (CAG) being used, leading to potential battery drain and suboptimal cell reselection.
Innovation Solution
Transmission of cell reselection-related information by network nodes, such as gNBs, to UE devices, including details on supported network slices and CAGs, allowing UEs to prioritize measurements and reselections to cells that support their active network configurations, thereby optimizing battery usage and reselection processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user devices perform signal measurements on all cells during idle or inactive states, then cell reselection reliability is improved, but battery power consumption increases
Solution Approach 1:
The network node performs preliminary actions by providing cell reselection information in advance, including identifiers of cells that support the UE's network slice or CAG. This allows the UE to pre-know which cells are suitable for reselection without needing to measure all cells, thus maintaining reselection reliability while reducing power consumption.
Solution Approach 2:
The invention extracts only the relevant subset of cell information that the UE needs for reselection - specifically, cells that support the UE's active network slice or CAG. By providing this filtered information from the network, the UE can avoid measuring unnecessary cells, thereby reducing power consumption while maintaining reliable reselection to appropriate cells.
2Measurement precision
If user devices measure signals from all cells, then cell selection accuracy is improved, but unnecessary measurements increase battery drain
Solution Approach 1:
The network node provides cell reselection information with local quality by identifying specific cells that have the required characteristics - namely, cells that support the UE's network slice or CAG. This localized information allows the UE to focus measurements only on relevant cells, improving selection accuracy while avoiding energy waste on irrelevant cells.
Solution Approach 2:
The network performs preliminary filtering and identification of suitable cells before the UE needs to make reselection decisions. By providing this pre-processed information including cell identifiers and support status for the UE's network slice or CAG, the UE can achieve accurate cell selection without performing exhaustive measurements on all cells.
3Reliability
If user devices perform comprehensive cell measurements, then reselection to suitable cells is ensured, but measurement time and power increase
Solution Approach 1:
The network extracts and provides only the essential reselection information - identifiers of cells that support the UE's network slice or CAG - eliminating the need for the UE to perform comprehensive measurements on all cells. This extracted information enables the UE to quickly identify suitable cells for reselection, reducing both measurement time and power consumption while ensuring reliable reselection.
Solution Approach 2:
The network performs preliminary identification and notification of suitable cells before the UE needs to execute reselection. By providing cell reselection information that includes identifiers and support status in advance, the UE can skip time-consuming comprehensive measurements and directly evaluate and reselect to appropriate cells, thus reducing measurement time while maintaining reliability.
Data Source
AI summary
A method may include receiving, by a user device from a network node of a wireless network, a cell reselection-related information associated with at least one of a network slice or a closed access group used by the user device; and performing, by the user device, a cell reselection based, at least in part, on the cell reselection-related information.