Master Information Block Coding for 5G NR Time Information Derivation
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR systems, traditional methods face challenges in deriving time information from synchronization signal blocks, especially for higher frequency bands, where the three least significant bits of the SS block index are difficult to determine, leading to issues in locating resources for system information transmission.
Innovation Solution
The method involves identifying time-sensitive bits in a master information block and placing them at predetermined encoding positions with a common property different from other bits, enabling earlier and more accurate decoding, such as initial positions or highest reliability bit channels, and mapping them with resource elements similar to primary or secondary synchronization signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional derivation methods are used for SS block index, then decoding of non-time-sensitive information is straightforward, but time-sensitive information (three least significant bits) cannot be accurately derived
Solution Approach 1:
The patent segments the MIB into time-sensitive bits (SS block index, half-frame indicator, system frame number) and non-time-sensitive bits (other system information). Time-sensitive bits are placed at predetermined encoding positions (earlier positions in the codeword) that enable earlier and more accurate decoding, while non-time-sensitive bits occupy remaining positions. This segmentation resolves the contradiction by providing accurate time information derivation without overwhelming complexity.
Solution Approach 2:
The patent performs preliminary placement of time-sensitive bits at predetermined encoding positions before the actual encoding process. This preliminary action ensures that time-sensitive information is decoded first and more accurately, resolving the issue of unable to derive time information while maintaining a relatively simple decoding process for other information.
2Loss of time
If all bits in MIB are encoded with the same property, then encoding is simple, but time-sensitive information cannot be prioritized for earlier decoding
Solution Approach 1:
The patent applies local quality by assigning different encoding properties to different bits in the MIB. Time-sensitive bits are placed at predetermined positions with the property of being decoded earlier and with higher priority, while non-time-sensitive bits use standard encoding. This local differentiation enables time prioritization without requiring complete redesign of the entire encoding process.
Solution Approach 2:
The patent performs preliminary arrangement of bits before encoding, placing time-sensitive bits at predetermined positions. This preliminary action allows the encoding process to proceed with standard methods while ensuring time-sensitive information is prioritized, thus reducing decoding time without significantly increasing encoding complexity.
3Ease of operation
If system information is transmitted without control channel resource specification, then transmission is simplified, but UE cannot locate resources for system information message
Solution Approach 1:
The patent segments the broadcast message to separate time-sensitive information (resource location, SS block index) from other system information. Time-sensitive bits are placed at predetermined encoding positions that enable earlier decoding, allowing UE to quickly locate resource information without needing complex control channel specifications, thus maintaining ease of operation while preventing information loss.
Data Source
AI summary
A system and method for coding master information blocks (MIBs) for broadcast are disclosed herein. In one embodiment, a method performed by a communication node includes: identifying time sensitive bits among a master information block; placing the time sensitive bits at predetermined encoding positions, wherein the time sensitive bits at the predetermined encoding positions are encoded with a common property different than other bits of the master information block; encoding the master information block; and transmitting a broadcast message comprising the master information block.