5G Synchronization Signal Power Boosting for Cell Edge Reliability
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Solution Overview
Problem
In radio communication systems, user equipment (UE) devices at the edge of a base station's coverage area often experience difficulty in receiving synchronization signals due to interference and weak signal strength, leading to synchronization failures and handover issues.
Innovation Solution
A heuristic model is implemented to collect performance information on UE devices and base stations, identifying UE devices experiencing synchronization failures and temporarily boosting the transmit power of synchronization signal blocks to facilitate synchronization while minimizing disruption to other devices in the overlapping area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmit power of synchronization signal blocks is increased to improve reception for UE devices at cell edge, then synchronization reliability is improved, but interference to adjacent cells and other devices in overlapping areas increases
Solution Approach 1:
The patent applies local quality by differentiating the treatment of synchronization signals based on spatial location. The base station identifies UE devices at cell edge versus those in overlapping areas and applies different power levels accordingly. Cell edge UEs receive boosted synchronization signals for reliable synchronization, while devices in overlapping areas receive normal power levels to minimize interference. This spatial differentiation resolves the contradiction by tailoring signal quality to local requirements.
Solution Approach 2:
The patent segments the service area into distinct regions: cell edge areas where synchronization is critical and overlapping areas where interference should be minimized. By dividing the coverage area into these segments, the system can independently control synchronization signal power for each segment, allowing boosted power at cell edge without affecting overlapping areas, thus resolving the contradiction between reliability and interference.
2Reliability
If the transmit power of synchronization signal blocks is temporarily boosted to facilitate synchronization for failing UE devices, then synchronization success rate is improved, but disruption to other devices in overlapping area increases
Solution Approach 1:
The patent implements dynamic power adjustment by temporarily boosting synchronization signal power only when and where needed. The base station monitors synchronization status of UE devices and dynamically adjusts power levels in response to detected failures. This dynamic approach ensures that power boosting is applied selectively to struggling devices without continuously disrupting other devices, resolving the contradiction between synchronization success and device disruption.
Solution Approach 2:
The system applies local quality by targeting power boosting specifically at cell edge locations where synchronization failures occur, while maintaining normal power levels in overlapping areas. This localized approach ensures that the harmful effect of power boosting is confined to the specific region needing assistance, thereby improving synchronization success without broadly disrupting other devices.
3Area of stationary object
If synchronization signal power is boosted to improve reception for UE devices at cell edge, then coverage area is extended, but interference to devices in overlapping area increases
Solution Approach 1:
The patent applies local quality by differentiating signal power based on spatial location. The base station identifies which UE devices are at cell edge (needing extended coverage) versus which are in overlapping areas (sensitive to interference). By tailoring power levels to these different local conditions, the system extends coverage at cell edge without proportionally increasing interference in overlapping areas.
Solution Approach 2:
The system segments the service area into cell edge regions and overlapping regions, allowing independent power control for each segment. This segmentation enables the base station to extend coverage in cell edge areas through power boosting while preventing the same boost from causing excessive interference in overlapping areas, thus resolving the contradiction between coverage extension and interference.
Data Source
AI summary
Aspects of the subject disclosure may include, for example, collecting performance information for a plurality of user equipment (UE) devices and a base station in a radio communication network, determining that one or more UE devices experience a synchronization failure attempting to connect to a base station, determining to temporarily boost transmit power of a synchronization signal block by the base station to facilitate synchronization, determining a boosted power level of the transmit power of the synchronization signal block to minimize disruption to UE devices in an overlapping area between a first cell coverage area of the base station and a second cell coverage area of an adjacent base station, transmitting the synchronization signal block by the base station at the boosted power level for reception by the UE devices, and connecting one or more UE devices to the base station. Other embodiments are disclosed.