5G Recipient Identification via Data and ID Bit Multiplexing
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Solution Overview
Problem
In 5G wireless communication systems, identifying the intended recipient for downlink control information is challenging due to the overhead from cyclic redundancy check (CRC) masking with user equipment identifiers, which degrades performance, especially in situations requiring blind decoding.
Innovation Solution
The method involves multiplexing data bits with identification bits, such as radio network temporary identifiers, for channel code shortening and rate matching, allowing for efficient identification and decoding at the receiver, potentially reducing the need for additional CRC bits and improving error detection.
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 in blind decoding situations, but the overhead from CRC degrades performance
Solution Approach 1:
The patent combines the recipient identification function with the channel decoding process by integrating UID-based CRC masking into the LDPC decoding framework. The CRC check is performed on the information block rather than the entire codeword, merging error detection and recipient identification into a unified process that reduces overhead while maintaining accuracy.
Solution Approach 2:
The patent changes the parameter of where CRC is applied - instead of masking CRC over the entire transmitted signal, the CRC is computed and checked only on the information block portion. This parameter change reduces the number of CRC bits needed while preserving the ability to identify the intended recipient through UID masking.
2Adaptability or versatility
If blind decoding is used when receiver does not know physical resource blocks, then recipient identification can be achieved, but performance deteriorates due to CRC overhead
Solution Approach 1:
The patent performs preliminary action by pre-computing the CRC on the information block before encoding and transmission. The receiver can then efficiently verify the CRC after decoding without needing to process the entire codeword, enabling blind decoding while maintaining reliability through the pre-prepared error detection mechanism.
3Quantity of substance
If CRC error detection is done on information block, then overhead is reduced compared to code word level, but error detection capability must be maintained
Solution Approach 1:
The patent applies local quality by concentrating the error detection function specifically on the information block rather than the entire codeword. The CRC is computed and verified locally on the essential data portion, providing sufficient error detection capability for the information-critical region while reducing overall overhead compared to global CRC checking.
Data Source
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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.