OD-SIB1 Validation for Low-Latency NES Cell Reselection
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, lack efficient mechanisms for cell selection and reselection procedures, especially when dealing with network energy saving (NES) modes, leading to increased latency and inefficiencies in system information updates.
Innovation Solution
Implementing a wireless device configured to validate the validity of on-demand system information block 1 (OD-SIB1) using value tags and receive cross-cell change indications for NES cells, enabling reduced latency in cell selection and reselection processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the wireless device validates OD-SIB1 information elements using value tags and receives cross-cell change indications for NES cells, then the latency in cell selection and reselection is reduced, but the device complexity increases due to additional validation and indication handling mechanisms
Solution Approach 1:
The network entity transmits value tags and cross-cell change indications in advance before the wireless device needs to perform cell reselection. The wireless device stores these indications and uses them proactively when selecting or reselecting to NES cells, avoiding the need for real-time information retrieval and reducing latency during the actual cell selection process
Solution Approach 2:
The patent introduces an intermediary mechanism where the network entity acts as a mediator that provides pre-configured validity information (value tags) and change indications to the wireless device. This intermediary system allows the device to make faster cell selection decisions by relying on pre-delivered validation data rather than performing exhaustive real-time checks
2Productivity
If the network entity transmits value tags and cross-cell change indications for NES cells, then the efficiency of system information updates is improved, but the network energy consumption increases due to additional transmissions
Solution Approach 1:
The network entity transmits cross-cell change indications and value tags periodically or event-triggered rather than continuously. The transmission occurs at specific intervals or when changes actually happen, allowing the network to balance the need for up-to-date information with energy conservation by avoiding redundant transmissions during stable periods
Solution Approach 2:
The wireless device is designed to autonomously validate its stored information using received value tags and to self-manage its cell selection process based on cross-cell change indications. This self-service capability reduces the need for continuous network intervention and frequent information broadcasts, thereby lowering overall network energy consumption while maintaining update efficiency
Data Source
AI summary
The apparatus may be a wireless device may be configured to select, while camped on a first cell, a second cell that supports a network energy saving (NES) mode and check, in response to selecting the second cell supporting the NES mode, a validity of one or more information elements associated with an on demand system information block 1 (OD-SIB1) for the second cell based on one or more value tags. The apparatus may be a wireless device configured to camp on a first cell and receive, while camping on the first cell, a cross-cell change indication of an update in a next modification period to system information (SI) transmitted by a second cell associated with the first cell.