Wireless Synchronization Signal Blocks Sub-Carrier Segmentation
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving reliable synchronization due to low transmission power of synchronization signal blocks (SSBs), leading to increased initial access delay and interference, especially in high-density networks requiring high data rates.
Innovation Solution
The method involves broadcasting multiple SSBs in the same time slot within the same carrier on different sub-carriers, with increased transmission power and the use of indicators to provide system information, allowing for more reliable detection and decoding, and implementing listen-before-talk (LBT) for efficient resource sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple SSBs are broadcasted in the same time slot on different sub-carriers with increased transmission power, then the reliability of SSB detection and decoding is improved, but the spectral resource usage and interference increase
Solution Approach 1:
The patent segments the synchronization signal transmission by broadcasting multiple SSBs on different sub-carriers (frequency resources) within the same time slot. This segmentation allows the system to distribute transmission power across multiple frequency resources, improving detection reliability while managing interference through resource diversity rather than concentrating power on a single carrier.
Solution Approach 2:
The patent introduces frequency diversity as an additional dimension for SSB transmission by utilizing multiple sub-carriers. Instead of relying solely on time or power dimensions, the system transitions to a multi-dimensional approach where SSBs are transmitted across different frequency sub-carriers, enabling improved reliability through frequency diversity while controlling interference through spatial-frequency separation.
2Loss of time
If multiple SSBs are broadcasted with increased transmission power, then the initial access delay is reduced, but the transmission power consumption increases
Solution Approach 1:
The patent segments the high-power transmission requirement across multiple SSBs on different sub-carriers. Instead of transmitting one SSB with very high power, the system transmits multiple SSBs with distributed power, achieving faster detection (reduced access delay) while spreading the power consumption across multiple lower-power transmissions, thereby managing overall energy efficiency.
Solution Approach 2:
The patent employs preliminary action by broadcasting multiple SSBs in advance across different sub-carriers before the UE needs to access the network. This pre-positioning of synchronization signals on multiple frequency resources ensures that the UE can quickly detect and decode an SSB without waiting for retransmissions, reducing initial access delay while the distributed power approach manages transmission energy consumption.
3Speed
If multiple SSBs are broadcasted on different sub-carriers, then the synchronization speed is improved, but the device complexity increases
Solution Approach 1:
The patent segments the synchronization signal transmission across multiple sub-carriers, allowing parallel transmission of multiple SSBs. This segmentation enables the network device to broadcast synchronization information simultaneously on different frequency resources, improving synchronization speed for UEs while the modular segmented structure helps manage device complexity through standardized processing of each sub-carrier segment.
Solution Approach 2:
The patent applies universality by using the same SSB structure and modulation scheme across multiple sub-carriers. The network device can reuse the same transmission framework, signal processing algorithms, and resource allocation mechanisms for each sub-carrier, thereby improving synchronization speed through multi-carrier transmission while avoiding proportional increases in device complexity due to the universal multi-functional design.
Data Source
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AI summary
A method and device for synchronization in a wireless communication system. The method includes: broadcasting multiple synchronization signal blocks (SSBs) within a same carrier; and broadcasting an indicator of system information according to information included in the multiple SSBs. Each of the multiple SSBs is sent on a different set of sub-carriers. Therefore, the demand for fair sharing of spectral resource may be met.