Wireless Synchronization Signal Beamforming and Redundancy
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving synchronization signals, particularly in multi-beam and redundancy version scenarios, which affects the detection and decoding of synchronization signals by user equipment (UE) in 5G and other wireless communication technologies.
Innovation Solution
The solution involves base stations transmitting synchronization signals in multiple beams with associated redundancy versions, using scrambling codes and beamforming techniques to improve detection, and user equipment determining beam identifiers and redundancy versions to descramble and decode broadcast channels effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations transmit synchronization signals in multiple beams with redundancy versions, then the reliability of synchronization signal detection is improved, but the device complexity increases
Solution Approach 1:
The synchronization signal transmission is segmented into multiple beams, where each beam carries a portion of the synchronization signal block. The base station divides the coverage area into multiple directional beams, each transmitting synchronized signals with specific beam identifiers. This segmentation allows UEs to detect synchronization signals more reliably by selecting the appropriate beam, while the base station manages complexity through structured beam formation and resource allocation.
Solution Approach 2:
The patent employs redundancy versions by varying transmission parameters such as scrambling codes, cyclic shifts, and beamforming weights across different transmissions of the same synchronization signal block. These parameter changes create diverse signal representations that improve detection reliability under different channel conditions, while the base station manages complexity through systematic parameter management and reuse patterns.
2Measurement precision
If user equipment determines beam identifiers and redundancy versions to descramble broadcast channels, then the measurement precision of synchronization signal detection is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The base station transmits beam identifiers and redundancy version information in advance within the synchronization signal block structure. UEs perform preliminary detection of these identifiers before attempting to descramble the broadcast channel. This preliminary action provides UEs with the necessary information to correctly process subsequent transmissions, improving detection precision while reducing the overall difficulty through staged processing.
Solution Approach 2:
The patent introduces beam identifiers as intermediary elements that facilitate the detection process. These identifiers act as keys that UEs use to select appropriate beamforming parameters and redundancy versions for descrambling. The intermediary beam identifiers simplify the detection process by providing a structured approach to matching transmitted and received signals, reducing the computational burden on UEs.
Data Source
AI summary
Aspects of the present disclosure describe receiving synchronization signals in wireless communications. A block of synchronization signals can be received from a base station in a first time interval. A beam identifier and a redundancy version associated with the block of synchronization signals can be determined. A broadcast channel can be received based at least in part on a timing associated with the beam identifier. The broadcast channel can be descrambled based at least in part on a scrambling code associated with the redundancy version.