SIB1 Extension for Faster System Information Acquisition
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Solution Overview
Problem
In LTE-based networks, existing solutions face challenges in efficiently distributing system information, particularly for UEs that are not capable of reading release extensions in SIB1 messages, leading to inefficiencies in resource utilization and increased system information acquisition time.
Innovation Solution
A method where a network node transmits a System Information Block Type1 (SIB1) message that includes other SIBs as extensions, allowing capable UEs to acquire system information earlier while ensuring legacy UEs can still receive necessary information in separate System Information messages, optimizing resource use and reducing the number of scheduled messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information is transmitted using separate SIB messages for each information type, then legacy UEs can receive information reliably, but the number of messages increases and acquisition time extends
Solution Approach 1:
The patent combines multiple SIB messages (SIB1, SIB2, SIB3) into a single unified SIB message structure. This unified message contains multiple information blocks that can be selectively decoded by different UE types, reducing the total number of messages transmitted and enabling faster acquisition while maintaining compatibility with legacy UEs through backward-compatible field structures.
Solution Approach 2:
The unified SIB message is segmented into multiple information blocks (first information block, second information block, third information block) that can be independently decoded. Capable UEs can directly decode the unified message to obtain all information, while legacy UEs can decode only the compatible portions, allowing parallel processing paths that reduce overall acquisition time.
2Quantity of substance
If system information is transmitted using separate SIB messages, then message size limits are not exceeded, but resource utilization efficiency decreases
Solution Approach 1:
Multiple separate SIB messages are merged into a single unified message structure, consolidating the radio resources required for transmission. This reduces overhead from multiple message headers, scheduling information, and repetition sequences, thereby improving resource utilization efficiency while maintaining compliance with message size limits through structured information blocking.
Solution Approach 2:
The unified SIB message structure serves multiple functions simultaneously: it provides complete system information for capable UEs, maintains backward compatibility for legacy UEs, and optimizes resource usage by transmitting all information in a single message structure rather than multiple separate messages.
3Productivity
If release extensions are added to SIB1 for capable UEs, then system information can be delivered more efficiently, but legacy UEs that cannot read extensions face incompatibility issues
Solution Approach 1:
The unified SIB message employs local quality by making different portions of the message accessible to different UE types. The first information block contains legacy-compatible information for all UEs, while additional information blocks contain extended functionality for capable UEs. This allows the same message structure to provide different levels of service quality to different receiver types simultaneously.
Solution Approach 2:
The message structure is designed to be dynamic in its interpretation: capable UEs can parse the full unified message structure including all information blocks, while legacy UEs dynamically adapt by parsing only the compatible first information block. This dynamic parsing capability allows the system to efficiently serve both UE types without requiring separate transmission streams.
Data Source
AI summary
A network node (200), a wireless device (202) and methods therein, for communicating or obtaining system information. The network node (200) transmits (2:1) a System Information Block Type1, SIB1, message that includes at least one other SIB than SIB1 as an extension. The wireless device (202) reads (2:2) the at least one other SIB in the SIB1 if the wireless device (202) is capable of reading the extension in the SIB1 message. The network node (200) may further transmit (2:1) the at least one other SIB in a subsequent separate System Information message. The wireless device (202) is then able to read (2:4) the at least one other SIB in the subsequently received System Information message if the wireless device (202) is not capable of reading the extension in the SIB1 message. Thereby, if the wireless device is capable of reading the extension in the SIB1 message it will acquire the system information earlier than if the other SIBs are only transmitted in less frequent System Information messages. If the wireless device is not capable of reading the extension in the SIB1 message, it can still acquire the other SIB(s) from the subsequent System Information message.