Synchronization Signal Transmission via Segmented Resource Groups
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Solution Overview
Problem
In 5G unlicensed spectrum systems, the existing methods for transmitting synchronization signals in standalone networking face challenges as user equipment (UE) may miss synchronization signals due to occupied time-frequency resources, leading to delays in synchronization completion.
Innovation Solution
The method involves transmitting synchronization signals with the same sequence number in both basic and extended groups on different time-frequency resources, allowing for repeated transmissions and using offset indication information to help UE determine the correct resource, thereby increasing the chances of successful reception and timely synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization signals are transmitted on fixed time-frequency resources, then the transmission structure is simple, but the UE may miss synchronization signals due to resource occupation by other signals
Solution Approach 1:
The synchronization signal transmission is segmented into basic groups and extended groups, each containing SSBs with the same sequence number but transmitted on different time-frequency resources. This segmentation allows the system to distribute synchronization signals across multiple resources, improving reliability while maintaining manageable configuration complexity through structured organization.
Solution Approach 2:
The patent changes the time-frequency resource parameters for SSB transmission by introducing extended groups with offset indications. The offset indication information modifies the time-frequency resource allocation parameters, allowing the same SSB sequence number to be transmitted on different resources, thereby improving reception reliability without excessive complexity.
2Reliability
If synchronization signals are transmitted repeatedly on different time-frequency resources, then the UE has more chances to receive synchronization signals, but the system resource consumption increases
Solution Approach 1:
The patent implements partial repeated transmission by transmitting SSBs with the same sequence number in both basic groups and extended groups. This partial repetition provides additional reception opportunities for UE while controlling resource consumption by not transmitting all possible repetitions, thus balancing reliability improvement with resource efficiency.
Solution Approach 2:
The base station performs channel detection on time-frequency resources for extended group SSBs before transmission. This preliminary action ensures that repeated transmissions only occur when resources are available and needed, reducing unnecessary resource consumption while maintaining reliability benefits when conditions permit.
3Reliability
If the UE needs to detect multiple time-frequency resources for synchronization signals, then the synchronization reliability improves, but the detection complexity and time increase
Solution Approach 1:
The patent employs feedback mechanisms where the UE reports detection results to the base station. The base station uses this feedback to determine whether extended group SSB transmissions are necessary, allowing the system to adaptively adjust detection requirements. This feedback loop improves reliability when needed while minimizing unnecessary detection time and complexity.
Solution Approach 2:
The base station performs preliminary channel detection on extended group time-frequency resources before transmitting SSBs. This preliminary action allows the system to pre-identify available resources, reducing the UE's detection burden and time while maintaining the reliability benefits of multiple transmission opportunities when resources are available.
Data Source
AI summary
A method and device for transmitting a synchronization signal includes: performing channel detection on time-frequency resources corresponding to a synchronous broadcast block of a base group to be sent and a synchronous broadcast block of an extended group, respectively, so as to detect whether the time-frequency resource is idle, wherein the base group and the extended group include synchronous broadcast blocks of the same serial number; the synchronous broadcast block of the base group of the same sequence number and the synchronous broadcast block of the extended group correspond to different time-frequency resources; transmitting an information block on the time-frequency resource when the time-frequency resource corresponding to the at least one synchronous broadcast block in the base group and the extended group is idle, the information block including the at least one synchronous broadcast block.