Dynamic UE Beam Switching for mmWave Asynchronous Networks
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Solution Overview
Problem
In asynchronous wireless communication networks, the fixed beam switch unit approach wastes measurement opportunities and delays cell measurements, impacting UE mobility due to infrequent switching and synchronization challenges across cells with differing timing offsets.
Innovation Solution
Dynamic beam switching is implemented by calculating a maximum offset among detected cells and scheduling beam switches based on this offset, using a predetermined table to determine the appropriate beam switch unit, allowing for more frequent measurements and improved mobility support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed beam switch unit approach is used, then device complexity is reduced, but measurement precision and mobility performance deteriorate due to wasted measurement opportunities and delayed cell measurements
Solution Approach 1:
The patent implements dynamic beam switching by adjusting the beam switch unit based on the maximum timing offset calculated from detected cells. Instead of using a fixed beam switch unit, the system dynamically selects from multiple predetermined beam switch units (first, second, third units) depending on the timing offset conditions, thereby optimizing measurement opportunities and mobility performance while managing device complexity.
2Measurement precision
If beam switching frequency is increased to improve mobility, then measurement precision improves, but device complexity increases due to synchronization challenges in asynchronous networks
Solution Approach 1:
The patent changes the parameter of beam switch unit selection based on the maximum timing offset value. By calculating the maximum offset among detected cells and comparing it against threshold conditions, the system selects appropriate beam switch units from a set of predetermined units, thereby adapting the beam switching frequency to network conditions without overly complicating the control mechanism.
3Productivity
If dynamic beam switching is implemented to reduce measurement delays, then productivity improves, but device complexity increases due to timing offset calculations and scheduling requirements
Solution Approach 1:
The patent employs preliminary action by pre-defining multiple beam switch units (first, second, third units) with different time durations before actual beam switching occurs. The system calculates the maximum timing offset in advance and selects the appropriate pre-defined beam switch unit, thereby reducing measurement delays without requiring complex real-time decision-making during the beam switching process itself.
Data Source
AI summary
Dynamic User Equipment (UE) beam switching for millimeter wave (mmWave) measurements in asynchronous networks is discussed in which a UE configured with a plurality of UE beams receives timing information of detected cells in an asynchronous network, and calculates, based on the timing information, a maximum offset for the detected cells indicating a timing difference between a pair of cells of the detected cells that is larger than a timing difference between any other pair of the detected cells. A UE beam switch from a UE beam to another UE beam of the plurality of beams is scheduled based on the maximum offset, which includes using the maximum offset to determine how often the UE beam switch can be performed. Other aspects and features are also claimed and described.