On-Demand SSB Timing for HARQ-Aware Cell Synchronization
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing synchronization signal block transmissions, particularly in heterogeneous networks with varying cell sizes and technologies, leading to suboptimal resource allocation and interference issues.
Innovation Solution
Implementing a mechanism for synchronized synchronization signal block (SSB) transmission across multiple cell types, including macro and small cells, using advanced beam management techniques and dynamic bandwidth adaptation to optimize resource allocation and reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SSB transmission is implemented across multiple cell types in heterogeneous networks, then network coverage and user experience are improved, but resource allocation efficiency deteriorates due to varying cell sizes and technologies
Solution Approach 1:
The patent segments SSB transmission by dividing it into different types: first SSB transmissions for initial cell search and second SSB transmissions for handover procedures. This segmentation allows optimized resource allocation for different network scenarios, resolving the contradiction between broad coverage and efficient resource utilization.
Solution Approach 2:
The patent implements dynamic SSB transmission mechanisms where the network can adjust transmission parameters based on UE capability indications and network conditions. This dynamic adaptation enables efficient resource allocation while maintaining comprehensive network coverage across heterogeneous cell types.
2Measurement precision
If synchronized SSB transmission is implemented across multiple cells, then synchronization accuracy is improved, but interference between cells increases
Solution Approach 1:
The patent applies local quality by allowing different SSB transmission configurations for different cells and UE scenarios. Each cell can be configured with appropriate transmission parameters based on its specific characteristics and the UE's capabilities, achieving good synchronization while minimizing interference through localized optimization.
3Productivity
If beam management techniques are used for SSB transmission, then data throughput is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service mechanisms where the UE autonomously determines its capability indication for SSB transmission based on its own requirements and the network conditions. This self-service approach enables high data throughput through beam management while reducing the complexity of centralized control and configuration.
Data Source
AI summary
A method can include receiving, by a wireless device, at a first time interval, a command indicating an activation of on-demand synchronization signal blocks (OD-SSBs) of a first cell. The method can also include receiving, via the first cell and from at least a time gap after the first time interval, one or more of the OD-SSBs. The time gap is the number of slots based on a subcarrier spacing (SCS) of an uplink bandwidth part (BWP), of a second cell, on which the wireless device transmits a hybrid automatic repeat request acknowledgment (HARQ-ACK) information corresponding to the command.