SSB Index Detection Using Network-Signaled Timing Offsets
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately detecting synchronization signal block (SSB) indices between cells, which affects synchronization and communication efficiency, particularly in heterogeneous networks with varying transmit power levels and interference.
Innovation Solution
The method involves generating and transmitting an SSB offset indication that indicates the maximum timing offset between SSB indices of different cells, enabling precise SSB index detection by user equipment (UE) for improved synchronization and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional SSB index detection methods are used in heterogeneous networks, then the detection process can be performed without additional signaling, but the synchronization accuracy deteriorates due to varying transmit power levels and interference between cells
Solution Approach 1:
The patent introduces an SSB offset indication as an intermediary parameter transmitted from the network to the UE. This indication provides timing offset information between SSBs of different cells, serving as a mediator that enables accurate SSB index detection in heterogeneous networks without requiring the UE to perform complex cross-cell synchronization analysis itself
Solution Approach 2:
The network performs preliminary analysis and determines the SSB offset indication in advance, before the UE performs SSB index detection. This preliminary action of pre-calculating and signaling the offset information simplifies the UE's detection process while maintaining high accuracy, as the complex synchronization relationship has already been resolved by the network
2Measurement precision
If SSB index detection is performed without SSB offset indication, then the signaling overhead is reduced, but the synchronization accuracy deteriorates in heterogeneous networks with varying transmit power levels
Solution Approach 1:
The patent extracts the critical timing offset information from the complex heterogeneous network environment and encapsulates it in a dedicated SSB offset indication parameter. This extraction separates the essential synchronization information from the overall network signaling, providing targeted information to the UE without transmitting unnecessary data
Solution Approach 2:
The patent changes the parameter representation by introducing a new SSB offset indication parameter that directly encodes timing offset information. This parameter change transforms the synchronization problem from requiring complex multi-parameter analysis to using a single, dedicated offset parameter, improving both accuracy and signaling efficiency
3Reliability
If conventional SSB detection methods are used in networks with interference, then the system operates without additional signaling mechanisms, but the detection reliability deteriorates due to varying transmit power levels and interference
Solution Approach 1:
The SSB offset indication acts as a reliable intermediary that provides pre-determined timing offset information to the UE. This mediator enables the UE to perform SSB index detection with higher reliability in interference-prone environments without requiring the UE to develop complex interference mitigation capabilities
Solution Approach 2:
The network performs self-service by autonomously determining and signaling the SSB offset indication, relieving the UE of the burden of performing complex cross-cell synchronization analysis. This division of labor improves detection reliability while keeping the UE's detection mechanism relatively simple
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a synchronization signal block (SSB) offset indication that indicates a maximum timing offset between an SSB index of a first cell and an SSB index of a second cell. The UE may perform SSB index detection based at least in part on the SSB offset indication. Numerous other aspects are described.