NR Sidelink SCI Source Destination Pruning via Modified CRC
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently processing and pruning sidelink control information (SCI) to optimize resource utilization and reduce latency.
Innovation Solution
The proposed solution involves generating a modified cyclic redundancy check (CRC) by combining CRC bits with source and destination information associated with the payload, allowing for the inclusion of this information within the SCI1 payload without increasing its size. This is achieved through methods such as XOR operations or hash functions, enabling efficient pruning and resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If source and destination information is included in SCI1 payload, then pruning efficiency is improved, but payload size increases
Solution Approach 1:
The patent merges source and destination information with the payload by XORing the CRC bits representing this information with the payload bits. This combination allows the pruning information to be embedded within the existing payload structure without increasing overall size, while still enabling efficient pruning at the receiver side.
Solution Approach 2:
The patent uses CRC bits as an intermediary to carry source and destination information. By encoding this pruning information in the CRC portion and XORing it with the payload, the system creates a mediator mechanism that conveys pruning data without requiring additional dedicated bits in the payload structure.
2Productivity
If modified CRC is used to carry source and destination information, then spectral efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent changes the parameter representation by XORing the CRC bits with payload bits to embed source and destination information. This parameter transformation allows the same physical resources to carry additional information, improving spectral efficiency while maintaining compatibility with existing decoding processes.
Solution Approach 2:
The patent replaces the need for separate physical transmission channels with a logical encoding scheme. Instead of using additional mechanical or physical resources to transmit pruning information, the system substitutes this with a bitwise XOR operation that embeds the information within the existing signal structure.
3Measurement precision
If source and destination information is mapped to payload bits, then pruning accuracy is improved, but latency increases
Solution Approach 1:
The patent performs preliminary action by pre-calculating and embedding the source and destination information in the CRC portion before payload transmission. This allows the receiver to have the pruning information ready immediately upon receiving the signal, enabling faster pruning decisions without waiting for separate information channels.
Data Source
AI summary
Method and apparatus for SCI source and destination pruning. The apparatus generates CRC bits corresponding to a payload. The apparatus combines the CRC bits with source information and destination information associated with transmission of the payload to generate a modified CRC. The apparatus transmits, to a second UE, the modified CRC and the payload. The modified CRC may be generated based on an XOR operation between the CRC bits corresponding to the payload and the source information and the destination information. The apparatus may map to a payload one or more bits that correspond to source information and destination information associated with transmission of the payload. The apparatus may transmit, to a second UE, the payload comprising the one or more bits that correspond to the source information and the destination information mapped to the payload.