On-demand System Information Transmission via Channel Quality
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Solution Overview
Problem
In wireless communication systems, there is a wasteful use of carrier resources due to unnecessary transmissions that interfere with critical signaling, as radio devices often request and receive system information sets without considering channel quality, leading to inefficient use of resources and potential decoding failures.
Innovation Solution
A network node provides a first system information set to a radio device with limitations specifying conditions for requesting a second system information set, such as detecting a minimum channel quality on the downlink, allowing for optimized transmission robustness and resource allocation based on channel conditions, including the choice between broadcast and device-specific transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radio devices request and receive system information sets without considering channel quality, then the radio device can obtain system information, but carrier resources are wasted and interference with critical signaling increases
Solution Approach 1:
The patent changes the parameter of transmission by introducing channel quality conditions. The network node determines whether to transmit the second system information set based on channel quality measurements, and the radio device determines whether to request it based on detected channel quality. This parameter-based control resolves the contradiction by enabling reliable reception only when channel conditions are suitable, thereby preventing resource waste from unnecessary transmissions.
2Reliability
If the network node transmits the second system information set without channel quality consideration, then the radio device can receive system information, but transmission robustness is insufficient leading to decoding failures
Solution Approach 1:
The patent introduces dynamic adaptation to channel conditions. The network node adjusts transmission robustness dynamically based on detected channel quality - using more robust transmission when quality is poor and less robust transmission when quality is good. The radio device similarly adapts its requesting behavior based on real-time channel quality detection. This dynamic approach resolves the contradiction by matching transmission characteristics to actual channel conditions.
3Loss of information
If the radio device requests the second system information set unconditionally, then the radio device can obtain complete system information, but unnecessary transmissions occupy valuable carrier resources
Solution Approach 1:
The patent applies preliminary action by having the radio device detect channel quality before requesting the second system information set, and having the network node detect channel quality before transmitting it. This preliminary assessment prevents unnecessary requests and transmissions when channel conditions are poor, thereby reducing carrier resource consumption while still enabling information acquisition when conditions are suitable.
4Productivity
If transmissions are aligned with channel conditions through quality detection, then resource efficiency improves, but device complexity increases due to additional detection and condition checking
Solution Approach 1:
The patent implements self-service by having both the radio device and network node perform channel quality detection and decision-making autonomously. The radio device independently detects channel quality and decides whether to request the second system information set. The network node independently detects channel quality and decides whether to transmit it. This self-service approach achieves resource efficiency without requiring complex centralized control or additional signaling overhead.
Data Source
AI summary
A network node (110) provides a first system information set to a radio device (120), The network node (110) also signals a limitation to the radio device (120). The limitation specifies a condition for requesting a second system information set from the network node (110). Correspondingly, the radio device (120) receives the first system information set and the limitation from the network node (110), and may, for example, determine whether or not to transmit a request for the second system information set based on detecting that the condition is or is not met, respectively.