LTE System Information Notification via Downlink Control Information
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Solution Overview
Problem
In modern cellular communication systems, such as LTE, changes in system information are not efficiently detected, leading to unnecessary paging procedures and inefficient acquisition of all system information by user equipment, which results in network penalties and increased power consumption.
Innovation Solution
A method and system where the eNodeB verifies system information modifications and transmits only the modified Master Information Block (MIB) or System Information Block 1 (SIB1) without initiating a paging procedure, allowing user equipment to acquire updated information at the start of each modification period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a paging procedure is triggered to notify system information modification, then the UE is notified about the SI change, but network penalties increase and power consumption increases
Solution Approach 1:
The patent extracts the notification function from the paging procedure by introducing a dedicated SI modification indicator in downlink control information. This separates the SI notification function from the general paging function, allowing selective notification only when SI changes occur, thereby avoiding unnecessary paging transmissions and reducing network energy consumption.
Solution Approach 2:
The patent changes the parameter representation by encoding SI modification indicators in downlink control information fields. Instead of using full paging messages, the system uses compact parameter changes (bit field indicators) to convey SI modification status, reducing transmission overhead and energy consumption while maintaining reliable notification.
2Reliability
If the UE acquires all system information immediately from the next modification period, then the UE is aware of the SI modification, but system information acquisition efficiency decreases
Solution Approach 1:
The patent segments system information into different types (MIB, SIB1, other SIBs) and uses specific indicators for each type in downlink control information. This segmentation allows the UE to selectively acquire only the modified information blocks rather than all system information, improving acquisition efficiency while ensuring the UE receives all necessary updates.
Solution Approach 2:
The patent implements partial action by having the UE acquire only the specific system information blocks indicated as modified, rather than acquiring all system information. The network transmits partial updates (only modified SIBs) instead of complete system information sets, reducing UE processing overhead and acquisition time while maintaining complete information accuracy.
3Reliability
If the UE is notified via paging message about SI modification, then the UE is informed of the change, but the UE is not aware of what information has exactly changed and in which message
Solution Approach 1:
The patent segments the notification mechanism into specific indicator fields within downlink control information, with separate indicators for MIB modification, SIB1 modification, and other SIB modifications. This segmentation provides the UE with precise information about which specific system information blocks have changed, eliminating the information loss present in generic paging notifications.
Solution Approach 2:
The patent introduces downlink control information as an intermediary carrier that conveys both the notification and the specific modification details simultaneously. The DCI acts as a mediator that delivers precise modification information (which SIBs changed) along with the notification itself, eliminating the need for separate paging messages and providing complete information in a single transmission.
Data Source
AI summary
The various embodiments of the present invention provide a method and system for notifying, a system information modification in at least one of a MIB/SIB1. The method comprises of transmitting a system information in a first modification period by an eNodeB, verifying the system information at eNodeB to check if the system information is to be modified in a modification period succeeding the first modification period, checking at eNodeB if only the system information corresponding to the at least one of the MIB or the SIB1 is modified, fetching the modified system information without initiating a paging procedure if only the MIB/SIB1 is modified and transmitting the modified system information in a succeeding modification period to the system information transmission module. The UE acquires the MIB/SIB1 at a start of each modification period.