CIoT System Information Change Indicator Bitmap
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Solution Overview
Problem
Current systems do not efficiently indicate which specific Extended Coverage System Information (EC-SI) messages have changed, leading to mobile stations needing to read the complete EC-SI message set even if only one message has changed, wasting battery power and increasing network access time.
Innovation Solution
A Radio Access Network (RAN) node transmits EC-SI messages with a bitmap that indicates which messages have changed since the last transmission, allowing mobile stations to skip reading unchanged messages and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile stations read the complete EC-SI message set to ensure they have the latest system information, then reliability of system information is improved, but battery power consumption increases and network access time increases
Solution Approach 1:
The patent extracts only the changed portion of system information by introducing a change indicator (bitmap) that identifies which specific EC-SI messages have been modified. Mobile stations read only the indicator and selectively read only the changed messages, rather than reading the complete message set, thereby reducing power consumption while maintaining information accuracy.
Solution Approach 2:
The patent segments the system information into individual message components and introduces a bitmap indicator that divides the information update notification into specific message-level changes. This allows mobile stations to process only relevant segments (changed messages) rather than the entire information set, reducing energy consumption.
2Reliability
If mobile stations read the complete EC-SI message set to ensure they have the latest system information, then reliability of system information is improved, but network access time increases
Solution Approach 1:
The patent extracts only the changed portion of system information by introducing a change indicator (bitmap) that identifies which specific EC-SI messages have been modified. Mobile stations read only the indicator and selectively read only the changed messages, rather than reading the complete message set, thereby reducing network access time while maintaining information accuracy.
Solution Approach 2:
The patent segments the system information into individual message components and introduces a bitmap indicator that divides the information update notification into specific message-level changes. This allows mobile stations to process only relevant segments (changed messages) rather than the entire information set, reducing access time.
3Use of energy by moving object
If the network transmits detailed information about which EC-SI messages have changed, then mobile stations can reduce power consumption by reading only changed messages, but device complexity increases
Solution Approach 1:
The patent uses a bitmap (visual indicator structure) where each bit represents the change status of a corresponding EC-SI message. This color-change-like binary indication system provides detailed change information in a compact, easily processable format that adds minimal complexity while enabling efficient selective reading by mobile stations.
Data Source
AI summary
A radio access network node (e.g., base station subsystem) and method are described herein for indicating to a mobile station (e.g., CIoT device) which system information (SI) message(s) (if any) has changed relative to the mobile station's last reading. In addition, a mobile station (e.g., CIoT device) and method are described herein for receiving an indication that indicates which system information (SI) message(s) (if any) has changed relative to the mobile station's last reading.