Reception Beam Offset Correction Using Neighbor SSB Synchronization
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Solution Overview
Problem
The reduction in service area of 5G communication systems due to significant path loss in ultrahigh frequencies and the need for optimal beam alignment in beamforming techniques to enhance communication performance.
Innovation Solution
A wireless communication device that continuously performs offset correction by selecting an optimal reception beam and uses target or neighbor synchronization signal blocks (SSBs) for automatic frequency control and symbol timing recovery during beam updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If beamforming is used to increase propagation range, then service area is improved, but beam alignment complexity increases
Solution Approach 1:
The system performs preliminary beam alignment by selecting optimal transmission and reception beams before data transmission begins. The base station and wireless communication device determine best beam pairs in advance, storing the selected reception beam information for subsequent use, thereby simplifying the complexity during actual data transmission.
Solution Approach 2:
The wireless communication device feeds back the selected reception beam information to the base station. This feedback mechanism allows the base station to know which beam the device is using, enabling coordinated beam management and reducing the complexity of maintaining beam alignment across the extended service area.
2Reliability
If reception beam is changed to optimize alignment, then communication performance is improved, but frequency and timing offset increases
Solution Approach 1:
The patent introduces a reference signal as an intermediary to facilitate offset correction when reception beams are changed. The reference signal provides a common reference for both frequency and timing synchronization, allowing the system to correct offsets caused by beam switching without directly measuring the offset between beams themselves.
Solution Approach 2:
The system dynamically adjusts frequency and timing parameters based on the selected reception beam. When a beam change is detected, the system modifies the frequency offset and timing advance parameters accordingly, using the beam index information to select appropriate correction values from pre-determined sets of parameters.
3Loss of energy
If multiple beams are used for beamforming, then path loss compensation is improved, but signal synchronization difficulty increases
Solution Approach 1:
The system segments the synchronization process by associating each beam with specific reference signals. Instead of trying to synchronize all beams simultaneously, the system handles synchronization beam-by-beam, using the beam index to select the appropriate reference signal for correction, thereby reducing the overall synchronization difficulty.
Solution Approach 2:
The system performs preliminary synchronization measurements for each beam using reference signals before actual data transmission. By pre-determining the synchronization parameters for each beam and storing them associated with the beam index, the system avoids the complexity of real-time synchronization during data transmission.
Data Source
AI summary
A method of operating a wireless communication device for correcting an offset between a base station and the wireless communication device includes determining whether to perform offset correction using a first target synchronization signal block (SSB) to generate a determination result in response to changing a selected reception beam from a first reception beam to a second reception beam in an SSB period, the first target SSB being received via the second reception beam, and performing the offset correction on the second reception beam using at least one first neighbor SSB based on the determination result, the at least one first neighbor SSB being received via the first reception beam.