PBCH Reference Signal Mapping for 5G NR Time Index Detection
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Solution Overview
Problem
The complexity of detecting and decoding the time index and partial minimum system information in the Physical Broadcast Channel (PBCH) of the 5G New Radio (NR) system, which requires multiple steps and increases processing complexity for User Equipment (UE).
Innovation Solution
Mapping a PBCH reference signal to an SS block with target information and transmitting parity information for error detection, allowing UE to perform channel estimation and check the target information directly without additional decoding processes, reducing complexity and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the time index and partial minimum system information are carried in the NR-PBCH and subjected to channel encoding process, then the information can be transmitted, but the UE needs to detect and decode the NR-PBCH to acquire the time index, increasing processing complexity
Solution Approach 1:
The patent segments the transmission process into two independent parts: (1) time index transmission through PBCH reference signal sequence without channel encoding, and (2) system information transmission through PBCH with channel encoding. This segmentation allows the UE to acquire the time index through simple correlation detection rather than full decoding, reducing processing complexity while maintaining transmission reliability
Solution Approach 2:
The patent extracts the time index information from the PBCH transport block and transmits it separately through the PBCH reference signal sequence. By taking out the time index from the encoded PBCH payload, the UE can obtain this critical timing information through simple reference signal detection without needing to decode the entire PBCH, thereby reducing computational complexity
2Reliability
If the time index is transmitted through channel encoding in NR-PBCH, then the information can be protected, but the detection and decoding procedure becomes relatively complex
Solution Approach 1:
The patent introduces the PBCH reference signal sequence as an intermediary carrier for time index transmission. Instead of embedding the time index directly in the encoded PBCH payload, the time index modulates the reference signal sequence, which serves as an intermediary that conveys timing information through its sequence pattern rather than through encoded bits, simplifying the detection process while maintaining protection through sequence correlation
Data Source
AI summary
Provided are an information transmission method, an information reception method, a network side device and a UE. The information transmission method includes: mapping a first to-be-transmitted signal and a second to-be-transmitted signal to a first OFDM symbol and a second OFDM symbol in an SS block respectively, a phase difference between the first to-be-transmitted signal and the second to-be-transmitted signal representing target information; and transmitting the first to-be-transmitted signal, the second to-be-transmitted signal and parity information for checking the target information through the SS block, and the parity information being carried by a PBCH.