Area Scope Indicator for System Information Reuse
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Solution Overview
Problem
User equipment (UE) in mobile communications networks faces performance penalties due to the need to read and process redundant system information when reselecting cells, as it is unaware that certain system information is common across neighboring cells, leading to increased energy consumption, latency, and resource usage.
Innovation Solution
A wireless access network node sends an area scope extending indicator to the UE, identifying common system information across multiple cells, allowing the UE to read only the differing information, thereby reducing the need to re-read common system information and enhancing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE reads and processes all system information when reselecting cells, then the UE ensures it has complete information for cell selection, but the UE consumes more energy and experiences increased latency
Solution Approach 1:
The patent extracts only the necessary system information from the complete set by introducing an area scope indicator. The indicator specifies which SIBs are common across multiple cells, allowing the UE to extract and process only the non-common SIBs when reselecting within the indicated area scope, thereby reducing energy consumption while maintaining reliability.
Solution Approach 2:
The network performs preliminary action by broadcasting the area scope indicator in advance, informing UEs about which system information blocks are common across multiple cells. This allows UEs to prepare efficiently for cell reselection by knowing beforehand which information can be reused, avoiding redundant reading and processing operations.
2Reliability
If the UE reads and processes all system information when reselecting cells, then the UE ensures it has complete information for cell selection, but the processing time and latency increase
Solution Approach 1:
The patent extracts only the necessary system information from the complete set by introducing an area scope indicator. The indicator specifies which SIBs are common across multiple cells, allowing the UE to extract and process only the non-common SIBs when reselecting within the indicated area scope, thereby reducing processing time and latency while maintaining reliability.
Solution Approach 2:
The UE skips the redundant reading and processing of common system information blocks when reselecting cells within the indicated area scope. By identifying which SIBs are common through the area scope indicator, the UE can rush through the reselection process using cached information, significantly reducing latency.
3Reliability
If the UE reads and processes all system information when reselecting cells, then the UE ensures it has complete information for cell selection, but the resource usage increases
Solution Approach 1:
The patent extracts only the necessary system information from the complete set by introducing an area scope indicator. The indicator specifies which SIBs are common across multiple cells, allowing the UE to extract and process only the non-common SIBs when reselecting within the indicated area scope, thereby reducing processing and storage resource usage while maintaining reliability.
Solution Approach 2:
The UE performs partial action by reading and processing only the necessary portion of system information (non-common SIBs) when reselecting cells within the indicated area scope, rather than processing the complete set. This partial action approach reduces device complexity and resource consumption while maintaining sufficient information for reliable cell selection.
Data Source
AI summary
In some examples, a first wireless access network entity receives, from a second wireless access network entity, a system information configuration of the second wireless access network entity, and identifies, based on the received system information configuration, common system information between the first and second wireless access network entities. The first wireless access network entity sends, to a user equipment (UE), an indicator extending an area scope of the common system information.