Downlink Shared Channel System Information Update Indication
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in indicating system information updates to connected devices, leading to unnecessary paging and power consumption issues due to irrelevant information being transmitted to all devices, regardless of their specific needs.
Innovation Solution
The system employs a downlink shared channel to transmit an indication of system information updates, using a message with fields containing relevant updates for specific devices, allowing them to selectively acquire and update their information, thereby reducing unnecessary data transmission and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information updates are transmitted to all connected devices via traditional paging channels, then all devices receive the update notification, but devices consume unnecessary power processing irrelevant information and the network experiences unnecessary signaling overhead
Solution Approach 1:
The system divides system information into multiple information blocks (SIBs) and further segments them into information elements (IEs) with specific identifiers. Each device is configured to monitor only the SIBs and IEs relevant to its function (e.g., gNB-specific IEs for IAB nodes, UE-specific IEs for user equipment). This segmentation allows selective updating where only devices with matching identifiers process the update notification, while others remain in low-power state.
Solution Approach 2:
The patent implements device-specific quality characteristics by assigning different identifier sets to different device types. IAB nodes monitor for gNB-specific IEs while UEs monitor for UE-specific IEs. The network node transmits update notifications containing identifiers, and only devices whose identifiers match the transmitted ones activate to process the update. This local quality approach ensures each device type receives appropriate updates without processing irrelevant information.
2Reliability
If system information updates are transmitted to all connected devices, then all devices are notified of updates, but unnecessary data transmission increases network overhead and reduces communication efficiency
Solution Approach 1:
The system segments system information into multiple information blocks (SIBs) with different IEs, each tagged with specific identifiers. Update notifications include only the identifiers of updated IEs rather than broadcasting to all devices. This allows the network to transmit minimal signaling information and enables devices to self-select whether to process the update based on identifier matching, reducing overall network traffic and energy consumption.
Solution Approach 2:
Instead of transmitting complete system information updates to all devices (excessive action), the network transmits only partial information - specifically, the identifiers of updated IEs in the downlink shared channel. Devices perform a quick identifier match to determine relevance. This partial action approach minimizes network transmission energy while ensuring all potentially affected devices receive necessary update information.
3Reliability
If traditional paging mechanisms are used to notify all devices of system information updates, then update notification is comprehensive, but devices must continuously monitor paging channels increasing complexity and power consumption
Solution Approach 1:
The system segments the monitoring requirement by dividing system information into multiple SIBs and IEs with unique identifiers. Devices are configured with specific identifier sets corresponding to their device type and function. Instead of monitoring all paging messages, devices only need to check whether transmitted identifiers match their configured set, significantly simplifying the monitoring complexity while maintaining comprehensive update notification for relevant devices.
Solution Approach 2:
The patent implements differentiated monitoring requirements based on device type and function. IAB nodes are configured to monitor for gNB-specific IEs while UEs monitor for UE-specific IEs. This local quality approach allows each device type to have optimized monitoring behavior tailored to its specific needs, reducing overall system complexity while ensuring reliable update delivery to all device types.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a first device may be in communication with a second device and may receive, from the second device, DCI in a downlink control channel and a message in a downlink shared channel. The message in the downlink shared channel may include an indication of a system information update that is relevant to the first device and may include information relating to one or more system information parameters that are updated. The first device may determine the system information update based on the DCI and the indication in the message and may acquire system information accordingly. The first device may update the system information of the first device based on the acquired system information update and may communicate with the second device using the updated system information.