SIB Correlation Enhancement Bits for MTC Power Reduction
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Solution Overview
Problem
Low power, low cost User Equipment (UE) devices in wireless communication systems, particularly Machine Type Communication (MTC) devices, face high power consumption due to the need to receive and process unnecessary system information messages, such as Master Information Blocks (MIB) and System Information Blocks (SIBs), which limits their operational efficiency and battery life.
Innovation Solution
The introduction of a System Information Block (SIB) with correlation enhancement bits that allows UE devices to correlate newly received SIBs with previously received ones, determining if changes have occurred, and selecting the correct SIB for communication configuration, thereby reducing the need for unnecessary decoding and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE devices receive and process all system information messages (MIB and SIBs) as required by current LTE standards, then system information completeness and reliability are maintained, but power consumption increases significantly for MTC devices
Solution Approach 1:
The patent extracts only the essential system information that MTC devices actually need from the complete set of MIB and SIB messages. By identifying and receiving only the critical subset of system information required for MTC operation, devices avoid processing unnecessary data while maintaining reliability of essential communications.
Solution Approach 2:
The patent segments system information into different categories based on MTC device requirements. Instead of receiving all system information uniformly, MTC devices selectively receive only the segmented portions relevant to their operation (such as access parameters, scheduling information specific to MTC), reducing overall power consumption while maintaining necessary functionality.
2Use of energy by moving object
If scheduling restrictions are placed on system information transmissions to reduce UE power consumption, then energy efficiency improves, but signalling information changes and signalling efficiency are limited
Solution Approach 1:
The patent implements dynamic scheduling for system information transmissions tailored to MTC device characteristics. Rather than applying fixed restrictions to all devices, the system dynamically adjusts transmission timing and frequency based on actual MTC device needs, maintaining signalling efficiency while optimizing power consumption. This allows flexible adaptation without compromising either energy efficiency or communication effectiveness.
Data Source
AI summary
A method and apparatus for communicating system information in a wireless communication system is provided. The method comprises generating and sending by a base station, for example an eNB, a system information block (SIB) which includes at least one correlation enhancement bit. This SIB is received by the terminal, for example a MTC UE, and this SIB is subsequently correlated with a previously received SIB. Further, upon the correlation of the SIB and the previously received SIB, a determination is made whether the SIB has in fact changed. Upon determining if the SIB has changed, the terminal selects the correct SIB which is to be used for configuring communication with the base station.