LTE-Advanced UE System Information Handling for Multi-Cell Connectivity
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Solution Overview
Problem
In the LTE-Advanced wireless communication system, there is no defined mechanism for user equipment (UE) to acquire system information from additional cells, leading to difficulties in establishing new connections and improper usage of system information across multiple cells.
Innovation Solution
A method and communication device that receive a radio resource control (RRC) message to determine the serving cell and apply its system information, distinguishing between cell-specific and non-cell-specific information to correctly utilize system information across multiple connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LTE system uses a single connection to a single cell with a single component carrier, then the system structure remains simple, but the system cannot support bandwidth extension and multiple connections required for LTE-Advanced
Solution Approach 1:
The patent segments the system into multiple component carriers (CCs) that can be independently configured and aggregated. Each CC can be separately managed with its own system information, allowing the system to extend bandwidth by adding more segments without fundamentally changing the core system structure. This enables LTE-Advanced to achieve wider bandwidths while maintaining the simplicity of the original LTE architecture for each individual carrier.
Solution Approach 2:
The patent implements a universal system information acquisition mechanism that works across multiple cells and component carriers. The UE can acquire and apply system information from multiple serving cells, making the system versatile enough to handle both single-cell and multi-cell scenarios, as well as various bandwidth configurations, using the same fundamental procedures.
2Adaptability or versatility
If the UE acquires system information from multiple cells in LTE-Advanced, then connection establishment with multiple cells becomes possible, but improper usage of system information may cause cell configuration problems
Solution Approach 1:
The patent applies local quality by allowing the UE to acquire system information from multiple cells while applying cell-specific parameters only to their respective serving cells. Different cells can have different system information configurations optimized for their local conditions, and the UE correctly applies each cell's system information only where appropriate, preventing configuration conflicts and ensuring reliability.
Solution Approach 2:
The patent introduces the RRC message as an intermediary that explicitly indicates which cell is the serving cell and whose system information should be applied. This intermediary mechanism resolves the ambiguity of which system information to use when multiple cells are available, ensuring that the correct cell-specific parameters are applied and preventing configuration errors.
3Loss of information
If the UE applies system information acquisition procedure for each cell selection and handover, then the UE can acquire necessary system information, but the process becomes complex and time-consuming in LTE-Advanced with multiple connections
Solution Approach 1:
The patent applies preliminary action by having the UE acquire system information from multiple serving cells in advance, before actual connection establishment or handover operations. The UE stores this system information and can quickly retrieve and apply it when needed, avoiding the need to perform time-consuming acquisition procedures during critical operations like handover or connection setup.
Solution Approach 2:
The patent merges the system information acquisition process across multiple cells by allowing the UE to acquire system information from all serving cells simultaneously or in a coordinated manner. This combined approach ensures that the UE has all necessary system information available without repeatedly performing separate acquisition procedures for each cell, reducing overall acquisition time while maintaining completeness.
Data Source
AI summary
A method of handling system information reception for a mobile device having a plurality of connections to a plurality of cells in a wireless communication system comprising a network, the method comprises receiving a radio resource control (RRC) message indicating that one of the plurality of cells is a serving cell from the network, determining the cell indicated by the RRC message as the serving cell of the mobile device, and applying system information of the serving cell.