On-Demand SSB Transmission for Efficient Secondary 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 traffic loads, leading to suboptimal resource allocation and increased power consumption.
Innovation Solution
Implementing on-demand synchronization signal block transmission mechanisms that adapt to network conditions, allowing wireless devices to selectively activate or deactivate synchronization signals based on specific criteria such as traffic load and device capabilities, thereby optimizing resource usage and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synchronization signal blocks are transmitted continuously in all cells, then network coverage and synchronization reliability are maintained, but resource allocation efficiency deteriorates and power consumption increases
Solution Approach 1:
The patent implements dynamic SSB transmission where the network configures different transmission patterns for different cells based on real-time conditions. Wireless devices receive configuration information indicating which cells should transmit SSBs and when, allowing the system to adapt transmission behavior dynamically rather than using static continuous transmission across all cells.
Solution Approach 2:
The patent applies different SSB transmission characteristics to different cells within the network. Configuration information is provided that specifies cell-specific transmission parameters, allowing some cells to transmit SSBs while others remain silent, or to transmit with different periodicities, thereby optimizing resource usage locally in each cell based on its specific needs.
2Reliability
If synchronization signal blocks are transmitted in all cells, then synchronization coverage is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The system dynamically determines which cells transmit SSBs based on configured parameters and current network state. The network can flexibly activate or deactivate SSB transmission in specific cells through configuration information, allowing optimization of synchronization coverage while preventing wasteful resource allocation in cells that do not require SSB transmission.
Solution Approach 2:
Different cells are assigned different SSB transmission characteristics through configuration information. Some cells are configured to transmit SSBs while others are not, or to transmit with different periodicities, creating localized optimization of synchronization coverage that improves overall resource allocation efficiency.
3Measurement precision
If wireless devices continuously monitor synchronization signals in all cells, then cell reselection accuracy is improved, but device power consumption increases
Solution Approach 1:
The network provides configuration information to wireless devices in advance that indicates which cells will transmit SSBs and when. Devices use this pre-provided information to selectively monitor only the configured cells during specific time periods, avoiding unnecessary monitoring of other cells and thereby reducing power consumption while maintaining accurate cell reselection capability.
Data Source
AI summary
A method can include receiving, by a wireless device from a base station, one or more radio resource control (RRC) messages, of a configuration of a secondary cell (SCell). The messages can include an on-demand synchronization signal block (OD-SSB) configuration of one or more OD-SSBs of the SCell, an initial state, of the OD-SSB configuration, indicating whether the one or more OD-SSBs are transmitted by the base station upon configuration of the SCell, or both the OD-SSB configuration and the initial state of the OD-SSB configuration.