On-Demand System Information Delivery in Wireless Networks
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Solution Overview
Problem
The next generation wireless cellular system faces challenges in minimizing energy consumption and reducing signaling overhead due to excessive broadcasting of system information, particularly in higher frequency bands where DL beam sweeping is necessary, leading to restrictive and inflexible data scheduling.
Innovation Solution
A method and system for provisioning system information in a wireless communication system, where a terminal acquires and stores system information blocks with value tags and area identifiers, allowing for on-demand delivery of system information based on indications and flags, reducing unnecessary broadcasts and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information is broadcasted periodically in next generation wireless system, then all user equipment can acquire system information, but energy consumption increases and signaling overhead becomes excessive
Solution Approach 1:
The patent implements dynamic system information delivery by allowing the base station to determine whether to broadcast system information based on current network conditions and user equipment states. Instead of periodic broadcasting, the system dynamically selects which user equipment receives system information through on-demand mechanisms, thereby reducing unnecessary energy consumption while ensuring all user equipment can acquire information when needed.
Solution Approach 2:
The patent changes the delivery parameter from periodic to on-demand by introducing value tags and area identifiers. The base station monitors changes in system information parameters and only triggers broadcasting when actual changes occur, rather than following a fixed periodic schedule. This parameter change approach reduces signaling overhead and energy consumption by eliminating redundant transmissions.
2Loss of information
If system information is broadcasted frequently to ensure freshness, then system information accuracy is improved, but signaling overhead increases and data scheduling flexibility is reduced
Solution Approach 1:
The patent implements a feedback mechanism where user equipment reports whether it has acquired up-to-date system information or needs updates. The base station uses this feedback to determine whether to broadcast system information, thereby maintaining information freshness only when necessary. This feedback-driven approach reduces signaling overhead by avoiding redundant broadcasts to user equipment that already has current information.
Solution Approach 2:
The patent extracts the essential elements of system information delivery by using value tags and area identifiers to track changes. Instead of broadcasting complete system information blocks periodically, the system extracts and transmits only the necessary update indicators, reducing signaling overhead while maintaining information freshness through efficient change detection mechanisms.
3Area of stationary object
If DL beam sweeping is performed in higher frequency bands, then coverage is improved, but system information broadcasting becomes more restrictive and data scheduling flexibility is reduced
Solution Approach 1:
The patent segments system information delivery by area identifiers and value tags, allowing different segments of user equipment to receive information independently based on their specific needs and locations. This segmentation enables the system to maintain coverage through beam sweeping while reducing the restrictiveness of information delivery, as each user equipment group can be managed independently, thereby improving data scheduling flexibility.
Data Source
AI summary
Disclosed is a method that decodes a broadcast channel to obtain first system information periodically broadcasted from a base station; applies at least one cell selection parameter indicated in the first system information to camp on a cell served by the base station and storing the first system information; accesses the camped cell based on at least one random access parameter indicated in the first system information; and determines whether at least one of a system information block of second system information available in the camped cell is provided based on at least one of the periodic broadcast and an on-demand basis. The on-demand basis to deliver the corresponding system information block of the second system information available in the camped cell is decided based on at least one of an indication and a flag included in the first system information for the system information block.