User Equipment Transmit Diversity Handling
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Solution Overview
Problem
Wireless telecommunications systems face challenges in handling broadcast system information, particularly in implementing changes to transmit diversity without causing communication disruptions, such as delays or call drops, when receiving incomplete or unreliable system information.
Innovation Solution
A method and apparatus for wireless user equipment that delays implementing changes in transmit diversity until all necessary system information is received or the signal quality falls below a threshold, ensuring minimal disruption to user experience by defining a subset of critical information required for reconfiguration and waiting for trigger conditions before making changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transmit diversity changes are implemented immediately upon receiving system information, then adaptability to network conditions is improved, but communication disruptions such as delays or call drops occur
Solution Approach 1:
The patent applies preliminary action by checking whether all necessary system information has been received before implementing transmit diversity changes. The UE verifies completeness of system information (such as verifying that all System Information Blocks have been received) before reconfiguring transmit diversity, thereby preventing communication disruptions caused by incomplete information
Solution Approach 2:
The patent implements feedback mechanisms by continuously monitoring system information reception status and using this feedback to determine whether to proceed with transmit diversity changes. The UE maintains state information about received system information and uses this feedback to make informed decisions about when to apply diversity configuration changes
2Reliability
If transmit diversity changes are delayed until all system information is received, then communication reliability is improved, but service disruption time increases
Solution Approach 1:
The patent applies partial action by implementing transmit diversity changes on a per-cell basis rather than requiring all system information from all cells to be received. The UE can apply diversity changes to cells for which complete system information is available, while continuing to monitor and process information from other cells, thereby reducing overall service disruption time
Solution Approach 2:
The patent segments the system information reception and processing into individual cell-specific units. Each cell's system information can be processed and acted upon independently, allowing the UE to implement diversity changes for some cells while still acquiring information from others, thereby parallelizing the process and reducing total time loss
3Productivity
If system information is processed without verification of completeness, then processing speed is improved, but accuracy of diversity implementation deteriorates
Solution Approach 1:
The patent applies preliminary verification by checking system information completeness before processing. The UE verifies that all necessary System Information Blocks have been received and validates the integrity of the information before implementing transmit diversity changes, ensuring accurate implementation without compromising processing efficiency
Data Source
AI summary
A wireless communications device, and a method of operating a wireless communications device, the device operative to receive broadcast system information from a network, the device being arranged to: receive first broadcast system information, said first broadcast system information defining scheduling information for a plurality of items of further broadcast system information; define a subset containing a plurality of items of further broadcast system information; receive an item of further broadcast system information relating to whether transmit diversity is in use; when it is determined that the device has received further broadcast system information relating to whether transmit diversity is in use, wait until one of the following conditions has been met before implementing on the device any changes in transmit diversity as defined by the further broadcast system information relating to whether transmit diversity is in use: i) the device having received all members of the subset of further broadcast system information; or ii) the quality of a signal received by the device being determined to be below a threshold.