SIB Scheduling Offset for Private Network Invisibility
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Solution Overview
Problem
Existing mobile network technologies face challenges in providing private access networks that are not searchable by standard mobile terminals and in altering mobile network display indications, as standard User Equipments (UEs) may not decode System Information Blocks (SIBs) correctly due to fixed transmission schedules, leading to 'No Service' messages.
Innovation Solution
Implementing a method for scheduling SIBs where the Master Information Block (MIB) is transmitted at a first fixed cycle, the first SIB is transmitted at a second fixed cycle with a SIB offset, and other SIBs are transmitted at cycles specified by a SIB scheduling information element in the first SIB, allowing for dynamic offset configuration to make private networks invisible to standard UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SIBs are transmitted at fixed cycles according to standard protocol, then standard UEs can decode SIBs correctly, but private networks cannot be hidden from standard UEs
Solution Approach 1:
The patent applies local quality by introducing a private network indicator and modified SIB scheduling to specific network instances without changing the overall standard protocol. Standard UEs follow the fixed cycle schedule and cannot detect private networks, while modified UEs with specific indicators can identify and connect to private networks by detecting the non-standard scheduling patterns.
Solution Approach 2:
The patent changes the scheduling parameters of SIBs in private networks by introducing a SIB scheduling offset that shifts the transmission timing from the standard fixed cycle. This parameter modification allows private networks to operate on non-standard schedules, making them invisible to standard UEs while remaining detectable by modified UEs that can compensate for the offset.
2Adaptability or versatility
If SIB transmission schedule is modified to hide private networks, then private networks become invisible to standard UEs, but standard UEs may fail to decode SIBs correctly
Solution Approach 1:
The patent segments the UE population into two groups: standard UEs that follow the fixed cycle schedule and cannot detect private networks, and modified UEs that have the capability to detect and compensate for the private network indicator. This segmentation allows the system to maintain backward compatibility while enabling private network functionality.
Solution Approach 2:
The private network indicator acts as an intermediary signal that modifies SIB transmission scheduling. This indicator enables modified UEs to identify private networks and adjust their decoding timing accordingly, while standard UEs ignore this indicator and continue with standard fixed-cycle decoding, thus resolving the conflict between network invisibility and decoding reliability.
3Adaptability or versatility
If dynamic SIB scheduling offset is introduced, then private networks can be customized and hidden, but system complexity increases
Solution Approach 1:
The patent introduces dynamic SIB scheduling by allowing the network to configure a SIB scheduling offset that can be adjusted based on private network requirements. This dynamic parameter enables flexible customization of private network timing and scheduling while maintaining a relatively simple implementation through broadcast signaling and basic timing adjustments in UE receivers.
Data Source
AI summary
Systems, methods and computer software are disclosed for scheduling System Information Blocks (SIBs). A Master Information Block (MIB) is transmitted at a first fixed cycle; starting from a first System Frame number (SFN). A first SIB is transmitted at a second fixed cycle and at a SIB offset after the SFN. Other SIBs are transmitted at cycles specified by a SIB scheduling information element in the first SIB.