Joint PSS and SSS Detection for Wireless Cell Search
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) faces challenges in efficiently detecting synchronization signals from target cells, particularly in scenarios where initial cell searches are unsuccessful or when handovers are required, leading to difficulties in establishing connections with neighboring cells.
Innovation Solution
The UE determines a reference signal sequence comprising a first and second level synchronization sequence, calculates an overall correlation value based on received signals, and establishes a connection with the target cell if the correlation value exceeds a threshold, utilizing additional information such as PBCH DMRS sequences or CRS to enhance detection rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional single-level synchronization signal detection is used, then the detection process is simple, but the detection rate is low in target cell search scenarios
Solution Approach 1:
The patent combines multiple synchronization signal sequences (PSS and SSS) into a joint detection process. The UE performs correlation detection using both PSS reference sequences and SSS reference sequences simultaneously, merging the detection of first-level and second-level synchronization signals into a unified process that improves detection reliability while managing complexity through structured sequence combination.
Solution Approach 2:
The patent uses composite reference signal sequences formed by combining PSS and SSS sequences. The reference signal sequence includes both first-level synchronization sequences (PSS) and second-level synchronization sequences (SSS), creating a composite detection mechanism that leverages the properties of both sequence types to enhance detection performance in target cell search scenarios.
2Adaptability or versatility
If initial cell search is performed, then connection with serving cell is established, but connection with target cell cannot be established when handover is required
Solution Approach 1:
The patent enables the UE to perform preliminary detection of target cell synchronization signals using the combined PSS and SSS sequences before handover is executed. By preparing the detection mechanism in advance with multi-level sequence correlation, the UE can quickly identify and lock onto target cells when handover becomes necessary, ensuring seamless connection transitions.
Data Source
AI summary
Aspects are described for a user equipment (UE) comprising a transceiver configured to enable wireless communication with a serving cell and a processor communicatively coupled to the transceiver. The processor is configured to determine a reference signal sequence that comprises a primary synchronization signal (PSS) sequence and a secondary synchronization signal (SSS) sequence of a target cell. The processor is further configured to receive a signal sequence from the target cell and calculate an overall correlation value based on the reference signal sequence and the received signal sequence. The processor is further configured to determine that the overall correlation value is above a threshold and detect a synchronization signal block (SSB) of the target cell based on the received signal sequence. Finally, the processor is configured to establish a wireless connection with the target cell based on the SSB.