Wireless Carrier Aggregation Reestablishment Message Configuration
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Solution Overview
Problem
In wireless communication systems, the conventional method of carrier aggregation (CA) configuration information being contained only in the RRC connection reconfiguration message leads to a time delay in resuming data transmission/reception through multiple component carriers (CCs) upon radio link failure.
Innovation Solution
A method involving detecting a radio connection failure, transmitting a radio connection reestablishment request message to a cell among aggregated cells, and receiving a radio connection reestablishment message including configuration information of additional aggregated cells, thereby reducing the time delay in recovering data transmission/reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If configuration information of aggregated cells is contained only in the RRC connection reconfiguration message, then the message structure remains simple and manageable, but time delay increases when recovering data transmission/reception after radio link failure
Solution Approach 1:
The patent applies preliminary action by including configuration information of aggregated cells in advance within the RRC connection reestablishment message. This allows the terminal to have the necessary configuration data ready before actual data transmission resumes, eliminating the need to wait for separate configuration messages and thus reducing recovery time delay after radio link failure.
2Productivity
If configuration information of multiple cells is transmitted proactively, then recovery speed improves after radio link failure, but message size and information overhead increase
Solution Approach 1:
The patent extracts only the essential configuration information of aggregated cells that is needed for rapid recovery, rather than transmitting complete configuration sets. This selective extraction reduces the information volume overhead while still providing sufficient data for the terminal to quickly resume data transmission and reception across multiple component carriers.
3Loss of time
If configuration information is included in the reestablishment message, then data transmission resumption is accelerated, but the complexity of message processing increases
Solution Approach 1:
The patent merges the configuration information of aggregated cells with the RRC connection reestablishment message into a single integrated message structure. This combining approach allows the terminal to process configuration data and establish connection in a unified operation, reducing the number of separate processing steps and actually simplifying the overall processing complexity while accelerating resumption.
Data Source
AI summary
A method and apparatus for transmitting and receiving configuration information of a plurality of cells in a wireless communication system are disclosed. A method for receiving configuration information of a plurality of cells by a terminal in a wireless communication system based on a carrier aggregation includes detecting a radio connection failure, transmitting a radio connection reestablishment request message to a cell from among a first plurality of aggregated cells, and receiving a radio connection reestablishment message including configuration information of a second plurality of aggregated cells from the cell from among the first plurality of aggregated cells.