Downlink CRC Length Signaling for Low-Latency List Decoding
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Solution Overview
Problem
The increasing number of user equipment (UEs) and data transmission demands in wireless communication systems pose challenges in efficiently utilizing limited radio resources, particularly in reducing latency and supporting high-density node communications, while also requiring new methods for transmitting data over unused frequency bands with different frequency characteristics.
Innovation Solution
The method involves transmitting and receiving downlink signals using cyclic redundancy check (CRC) sequence length information, where the CRC sequence length is determined based on list size and information bits, allowing for efficient encoding and decoding of signals, thereby improving throughput and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of user equipments and data transmission demands increase, then communication capacity and data throughput increase, but radio resource utilization efficiency deteriorates and latency increases
Solution Approach 1:
The patent applies dynamics by making the CRC sequence length configurable and adaptable based on transmission conditions. The base station can dynamically adjust the CRC length parameter to match different service requirements (eMBB, mMTC, URLLC), allowing the system to optimize between throughput and latency dynamically rather than using a fixed CRC length for all scenarios
Solution Approach 2:
The patent implements parameter changes by modifying the CRC sequence length parameter according to different service types and transmission conditions. By changing this parameter, the system can achieve different trade-offs between error detection capability (affecting throughput) and processing overhead (affecting latency), thus resolving the contradiction between data throughput and latency
2Adaptability or versatility
If the number of user equipments increases in a prescribed resource region, then service coverage increases, but radio resource availability per user decreases and communication efficiency deteriorates
Solution Approach 1:
The patent applies local quality by allowing different CRC sequence lengths to be used for different users or different service types within the same system. This enables each user or service to have optimized error detection parameters suited to their specific requirements, rather than using a uniform approach that would compromise overall system efficiency
Solution Approach 2:
The system dynamically adjusts CRC parameters based on the number of active users and resource allocation patterns. As user density increases, the base station can adaptively modify CRC lengths to maintain appropriate error detection levels while minimizing overhead, thus preserving communication efficiency even as service coverage expands
3Adaptability or versatility
If conventional communication technology is applied to new frequency bands, then frequency band utilization increases, but communication performance deteriorates due to different frequency characteristics
Solution Approach 1:
The patent implements parameter changes by adjusting CRC sequence lengths based on frequency band characteristics. Different frequency bands (sub-6GHz, mmWave) have different propagation characteristics and error rates; by modifying the CRC parameter, the system adapts error detection capability to match the specific band being used, maintaining reliability across diverse frequency ranges
Solution Approach 2:
The patent achieves universality by creating a unified communication framework that can operate across multiple frequency bands with different characteristics. The configurable CRC parameter serves as a universal adaptation mechanism that enables the same communication technology to function reliably whether in conventional bands or newly introduced bands with different properties
Data Source
AI summary
The method whereby user equipment receives a downlink signal in a wireless communication system, according to one embodiment of the present invention, comprises: receiving, from a base station, information on the length of a cyclic redundancy check (CRC) sequence to be added to information bits; receiving a downlink signal; and decoding the downlink signal by using a CRC sequence in the downlink signal on the basis of the information on the length of the CRC sequence, wherein the information on the length of the CRC sequence indicates a first length added for list decoding or a total CRC length obtained by adding the first length.