5G Recipient Identification via Multiplexed ID Bits and Blind Decoding
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Solution Overview
Problem
In 5G wireless communication systems, identifying the intended recipient of a packet is challenging, especially when blind decoding is required, as existing methods like CRC masking with UID in LTE lead to performance degradation due to overhead.
Innovation Solution
The method involves multiplexing data bits with identification bits, such as RNTI, using channel code shortening and rate matching, and inserting logarithmic likelihood ratio values for efficient decoding, allowing the receiver to identify the intended device and detect errors effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CRC masking with UID is used for recipient identification, then the intended recipient can be identified, but performance deteriorates due to overhead
Solution Approach 1:
The patent extracts the identification function from the CRC masking mechanism and implements it separately using dedicated identification bits. Instead of masking CRC bits with UID, the system uses channel code shortening where identification bits are separated from data bits, allowing identification without the performance degradation caused by CRC masking overhead.
2Loss of energy
If identification bits are multiplexed with data bits using channel code shortening, then CRC overhead is reduced, but device complexity increases
Solution Approach 1:
The patent segments the transmitted bits into identification bits and data bits. The identification bits are multiplexed with data bits through channel code shortening, where the total number of bits is reduced by the number of identification bits. This segmentation allows efficient error detection with reduced overhead while maintaining manageable complexity through systematic processing steps.
3Ease of operation
If blind decoding is used when PRBs are unknown, then the receiver can identify the intended packet, but the process becomes inefficient
Solution Approach 1:
The patent applies preliminary action by inserting known logarithmic likelihood ratio (LLR) values corresponding to identification bits before decoding. This preliminary insertion of known values facilitates the blind decoding process, enabling the receiver to efficiently identify intended packets without exhaustive searching, thereby improving decoding efficiency while maintaining blind decoding capability.
Data Source
AI summary
Identification of communication participants may be an important aspect of various communication systems. For example, fifth generation (5G) wireless communication systems may benefit from suitable recipient identification. A method can include obtaining data bits to be communicated to a target device. The method can also include obtaining identification bits corresponding to at least one of sender or receiver of the data bits. The method can further include multiplexing the data bits with the identification bits.