5G Synchronization Signal Transmission via Beamforming
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Solution Overview
Problem
Current mobile communication systems face challenges in achieving higher capacity, throughput, lower latency, and better reliability due to issues with millimeter wave propagation characteristics, such as high loss, poor penetration, and high power consumption, making them unsuitable for commercial mobile communication.
Innovation Solution
The method involves transmitting and receiving synchronization signals and system information using transmitter and receiver beamforming in a 5G mobile communication system, specifically by sending primary synchronization channel (PSC) and secondary synchronization channel (SSC) symbols in a slot of a frame-based wireless communication system, along with a broadcast control channel (BCH), to facilitate efficient synchronization and beam selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If millimeter wave propagation is used to increase capacity and throughput, then data transmission rate is improved, but signal loss and penetration capability deteriorate
Solution Approach 1:
The patent introduces beamforming technology as an intermediary mechanism to focus millimeter wave signals into directed beams, using signal processing techniques to compensate for propagation losses and improve effective transmission distance and reliability
Solution Approach 2:
The patent changes key transmission parameters including using higher frequency bands (28GHz, 39GHz, 60GHz) to increase capacity, while simultaneously adjusting beamforming parameters, antenna configurations, and modulation schemes to maintain signal quality despite increased path loss
2Productivity
If millimeter wave propagation is used to increase capacity, then system throughput is improved, but penetration capability and reliability worsen
Solution Approach 1:
Beamforming acts as an intermediary to create focused signal paths that can penetrate obstacles more effectively by concentrating energy, while diversity techniques provide alternative paths for signal transmission to maintain reliability
Solution Approach 2:
The patent transitions from traditional omnidirectional or limited-sector antenna patterns to three-dimensional beamforming capabilities, adding spatial dimensionality to signal transmission and enabling more reliable connectivity through multiple angular paths
3Measurement precision
If beamforming is used to improve signal quality and synchronization, then time and frequency synchronization is achieved, but device complexity increases
Solution Approach 1:
The patent implements preliminary beam selection and synchronization signal transmission before main data communication, allowing the receiver to acquire timing and frequency information in advance, which simplifies subsequent data reception processing
Solution Approach 2:
The synchronization signals are designed to enable self-synchronization, where the receiver automatically acquires time and frequency offsets through correlation processing of the transmitted synchronization sequences without requiring complex external coordination
Data Source
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AI summary
A base station and a method for use in a base station in a wireless communication system are provided, the method comprising transmitting a first symbol for a primary synchronization channel, PSC, to a mobile station in a slot of a subframe; and after transmitting the first symbol, transmitting a second symbol for a secondary synchronization channel, SSC, to the mobile station in the slot of the subframe, wherein the first symbol and the second symbol are separated by one symbol in the slot. Further, a corresponding mobile station and a method for use in a mobile station in a wireless communication system are provided.