DMRS Signaling Verification via CRC-Coupled Payload Scrambling
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Solution Overview
Problem
Wireless communication systems face detection errors in demodulation reference signals (DMRS), leading to processing latency and decoding failures due to incorrect detection of signaling information, which affects system acquisition, handover, and HARQ retransmission delays.
Innovation Solution
The proposed solution involves calculating cyclic redundancy check (CRC) bits based on both reference signal bits and data bits, and transmitting these CRC bits with the DMRS and data transmission to enhance detection reliability. Additionally, a scrambling code is determined from the DMRS signaling information to scramble the data payload, ensuring correct decoding even if the DMRS is incorrectly detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CRC bits are calculated based on both reference signal bits and data bits, then detection reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the CRC calculation process to operate on both reference signal bits and data bits simultaneously, creating a unified protection mechanism. This merging approach allows the system to verify the integrity of reference signal detection and data reception together, improving overall detection reliability while managing complexity through integration rather than separate independent processes
Solution Approach 2:
The CRC mechanism is designed to serve multiple functions: it protects both the reference signal information and the data payload within a single verification framework. This multi-functionality allows the same CRC bits to validate multiple aspects of the transmission, reducing the need for separate verification mechanisms and thereby managing device complexity while enhancing reliability
2Measurement precision
If scrambling code is determined from DMRS signaling information, then decoding accuracy is improved, but processing time increases
Solution Approach 1:
The patent determines the scrambling code from DMRS signaling information in advance, before the actual data decoding process begins. This preliminary action allows the receiver to prepare the correct scrambling sequence ahead of time, ensuring that when data decoding occurs, the accurate scrambling code is already available, thereby improving decoding accuracy without adding significant processing time during the critical data reception phase
Solution Approach 2:
The DMRS signaling information itself contains the necessary elements to generate the scrambling code, allowing the system to self-determine the scrambling sequence from the received signal without requiring additional external configuration or complex lookup tables. This self-service approach reduces processing overhead while maintaining decoding accuracy
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A device—such as a base station or user equipment (UE)—may transmit a demodulation reference signal (DMRS) including signaling information in addition to channel estimation information. To improve reception of the DMRS signaling information, the transmitting device may employ data protection techniques to the signaling information and modify a data payload transmitted in the physical data channel associated with the DMRS. In one aspect, the transmitting device may modify cyclic redundancy check (CRC) bits in the payload to include verification for the signaling information. In another aspect, the transmitting device may determine a scrambling code based on the signaling information, and may scramble the payload based on the scrambling code.