Cross-Cell SIB Segment Concatenation for 5G Mobility
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Solution Overview
Problem
In 5G wireless communication networks, user equipment (UEs) experience delayed or incomplete acquisition of segmented System Information Blocks (SIBs, particularly during frequent cell reselections, due to the current segmentation process which requires constant deletion and reacquisition of segments, leading to inefficiencies especially in Public Warning Systems (PWS) where timely information delivery is critical.
Innovation Solution
Introducing a method where the network informs UEs about the applicability of cross-cell concatenation of segments using a segmentationAreaId, allowing UEs to concatenate segments from different cells if they belong to the same segmentation area, thereby reducing the need for repeated segment acquisition and enhancing timely information delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If segmented SIBs are broadcast in multiple cells, then system information coverage is improved, but acquisition time increases due to constant deletion and reacquisition of segments during cell reselection
Solution Approach 1:
The network pre-configures segmentation area identifiers (segmentationAreaId) in SIB1 before UE performs cell reselection. This allows UE to anticipate which segments can be reused across cells, eliminating the need for deletion and reacquisition during mobility. The preliminary configuration enables seamless continuation of segment collection in new cells.
Solution Approach 2:
Segments broadcast in different cells are copied with identical segmentationAreaId values when they belong to the same segmentation area. UE can directly use these copied segments from new cells without re-acquisition, maintaining information consistency across cell boundaries and reducing acquisition time during mobility.
2Productivity
If segments are reused across multiple cells, then acquisition speed improves, but information consistency may be compromised without proper segmentation identification
Solution Approach 1:
The network provides feedback to UE through segmentationAreaId in SIB1, enabling UE to verify whether segments from different cells belong to the same segmentation area. This feedback mechanism ensures UE only reuses consistent segments, maintaining information reliability while enabling cross-cell segment sharing for faster acquisition.
Solution Approach 2:
The patent introduces a new parameter segmentationAreaId that changes based on the segmentation area configuration. By comparing this parameter value across cells, the system dynamically determines segment reusability, balancing acquisition speed and information consistency without hardcoding segment validity rules.
3Adaptability or versatility
If segmentation area identification is implemented, then cross-cell segment concatenation becomes possible, but network signaling overhead increases
Solution Approach 1:
The segmentationArea_id is implemented as a multi-functional parameter that serves both as an area identifier for mobility management and as a segment consistency identifier. This universal use of the same parameter across multiple functions avoids additional dedicated signaling for segment identification, reducing overall signaling overhead while enabling cross-cell concatenation.
Data Source
AI summary
Techniques for providing and receiving system information messages from a wireless network. An example method, in a user equipment, UE, comprises receiving (510) at least one segment of a segmented system information block, SIB, in a first cell and receiving (520) at least one other segment of the SIB in a second cell. The example method further comprises determining (530), based on information received from the wireless network, whether the at least one segment of the SIB received in the first cell can be concatenated with the at least one other segment of the SIB received in the second cell. The example method still further comprises concatenating (540) the at least one segment received in the first cell with the at least one other segment received in the second cell, to form the SIB, or discarding the at least one segment received in the first cell, depending on said information.