On-Demand System Information Acquisition Retry Logic
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Solution Overview
Problem
In wireless communication systems, there is a challenge in efficiently obtaining system information, particularly when essential system information is not promptly received from a cell, leading to delays and potential loss of connectivity.
Innovation Solution
A method and apparatus for user equipment to receive essential system information from a first cell, request on-demand system information, re-request if not received within specific time periods, and re-select a second cell if the first cell is deemed barred after maximum requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user equipment continuously requests on-demand system information from the first cell, then the system information acquisition reliability is improved, but the time consumption and request overhead increase
Solution Approach 1:
The user equipment performs preliminary actions by sending multiple request messages at predetermined intervals before giving up on the first cell. This preliminary action ensures that the equipment has exhaustively attempted to acquire system information from the current cell before switching to a second cell, thereby maintaining acquisition reliability while managing time consumption through structured retry attempts.
2Reliability
If the user equipment re-requests system information after a failed request, then the information acquisition reliability is improved, but the request overhead and network load increase
Solution Approach 1:
The user equipment implements periodic action by sending re-requests at predetermined intervals rather than continuously. This periodic approach maintains information acquisition reliability by systematically retrying requests while reducing request overhead compared to continuous re-requesting, as there are specific time gaps between retry attempts.
3Reliability
If the user equipment waits for a long period for system information, then the information completeness is improved, but the connectivity response time deteriorates
Solution Approach 1:
The user equipment performs preliminary acquisition attempts with predetermined waiting periods before switching cells. This ensures that the equipment has made exhaustive efforts to acquire complete system information from the first cell within reasonable time frames before moving to alternative cells, balancing information completeness with response time requirements.
Data Source
AI summary
Systems and techniques for obtaining system information in a wireless communication system include: receiving a System Information Block Type 1 (SIB1) from a first cell, the SIB1 including information for acquiring an on-demand SI; requesting the on-demand SI to the first cell; based on the on-demand SI being not received from the first cell in a first specific period of time after the requesting the on-demand SI to the first cell is successful, re-requesting the on-demand SI to the first cell; and based on the on-demand SI being not received from the first cell in a second specific period of time after a total number of requesting the on-demand SI to the first cell reaches a maximum value, re-selecting a second cell under assumption that the first cell is a barred cell.