On-Demand System Information Block Communication to Reduce Signaling
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Solution Overview
Problem
Existing wireless communication systems waste network resources by periodically broadcasting system information blocks (SIBs) that change infrequently or are relevant only to a subset of users, leading to inefficient signaling and resource usage.
Innovation Solution
Implementing on-demand system information block (OD-SIB) communication, where user equipment (UE) requests SIBs via uplink signals, enabling reception in accordance with configuration information and random-access procedures, allowing SIBs to be transmitted only when needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If system information blocks are periodically broadcast to all users, then all users can access system information, but network resources are wasted for users who do not need the information
Solution Approach 1:
The patent extracts the system information broadcasting function from the general downlink shared channel and creates a dedicated physical downlink control channel (PDCCH) for system information. This separation allows the network to selectively broadcast system information only to users who need it, rather than forcing all users to receive all broadcasts, thereby reducing unnecessary network resource consumption while maintaining information availability for interested users.
Solution Approach 2:
The patent introduces dynamic system information indication mechanisms where the network can adaptively determine which users need system information and when to broadcast it. The system transitions from static periodic broadcasting to dynamic on-demand broadcasting based on user needs, allowing the network to adjust transmission timing and targeting to optimize resource utilization.
2Reliability
If system information blocks are broadcast periodically, then users can receive updates, but signaling overhead increases when information changes infrequently
Solution Approach 1:
The patent maintains periodic broadcasting for system information but introduces a configuration mechanism that allows the network to adjust the broadcast period dynamically. When system information changes infrequently, the network can extend the broadcast interval, reducing signaling overhead while still ensuring users receive updates when necessary. This flexible periodic action resolves the contradiction between maintaining freshness and reducing overhead.
Solution Approach 2:
The patent implements feedback mechanisms where users can indicate their need for system information updates, and the network can monitor system information change status. This feedback loop allows the network to adjust broadcast timing based on actual changes, reducing unnecessary signaling overhead while ensuring reliable information delivery when changes occur.
3Adaptability or versatility
If system information is broadcast to all users, then coverage is maximized, but resource usage increases for subset of users
Solution Approach 1:
The patent applies local quality by differentiating the treatment of system information delivery for different user groups. Instead of uniform broadcasting to all users, the system identifies and targets specific user subsets who need system information based on their operational state and requirements. This allows the network to concentrate transmission resources on relevant users, reducing overall signal transmission volume while maintaining adequate coverage for those who need it.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information that includes one or more parameters for a system information block process. The UE may transmit, in accordance with the configuration information, an uplink signal that includes a message, the message indicating a request for a system information block. The UE may receive the system information block in accordance with the configuration information and the uplink signal. Numerous other aspects are described.