Multi-Cell Beam Sweeping Synchronization for Faster Beam Pairing
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies and high power consumption during beam sweeping for serving and neighbor cells due to the need to consider each transmit beam individually, leading to prolonged sweeping times and increased power usage.
Innovation Solution
The method involves the terminal device receiving information from the network device about the synchronization and offset values of neighbor cell beam sweeping relative to the serving cell, allowing it to determine beam directions and times more efficiently, thereby reducing power consumption and improving sweeping efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device performs beam sweeping for each transmit beam of serving cell and neighbor cells individually, then the beam alignment can be achieved, but the beam sweeping time increases and power consumption increases
Solution Approach 1:
The patent merges the beam sweeping processes of the serving cell and neighbor cells by utilizing the QCL relationship. The terminal device determines that transmit beam sweeping of neighbor cells is synchronized with the serving cell, allowing the device to perform receive beam sweeping once for both cells simultaneously, thereby reducing total beam sweeping time while maintaining alignment accuracy
Solution Approach 2:
The patent applies preliminary action by having the network device pre-configure QCL parameter information indicating the synchronization relationship between serving cell and neighbor cell beam sweeping. This allows the terminal device to anticipate and prepare for synchronized beam sweeping patterns, reducing the time required for actual beam alignment operations
2Measurement precision
If the terminal device performs beam sweeping for each transmit beam of serving cell and neighbor cells individually, then the beam alignment can be achieved, but the power consumption increases
Solution Approach 1:
The patent merges the beam sweeping processes of the serving cell and neighbor cells by utilizing the QCL relationship. The terminal device determines that transmit beam sweeping of neighbor cells is synchronized with the serving cell, allowing the device to perform receive beam sweeping once for both cells simultaneously, thereby reducing total beam sweeping time while maintaining alignment accuracy
Solution Approach 2:
The patent applies preliminary action by having the network device pre-configure QCL parameter information indicating the synchronization relationship between serving cell and neighbor cell beam sweeping. This allows the terminal device to anticipate and prepare for synchronized beam sweeping patterns, reducing the time required for actual beam alignment operations
3Measurement precision
If the terminal device considers each transmit beam for each cell during beam sweeping, then comprehensive beam alignment is achieved, but the complexity of the beam sweeping process increases
Solution Approach 1:
The patent uses copying by having the terminal device copy the beam direction information from the serving cell to the neighbor cells based on the QCL relationship. Instead of independently determining beam directions for each cell, the device copies the synchronized beam sweeping pattern, significantly reducing computational complexity while maintaining comprehensive beam alignment
Solution Approach 2:
The patent applies preliminary action by having the network device pre-configure QCL parameter information indicating the synchronization relationship between serving cell and neighbor cell beam sweeping. This allows the terminal device to anticipate and prepare for synchronized beam sweeping patterns, reducing the time required for actual beam alignment operations
Data Source
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AI summary
The present disclosure provides a method and apparatus for wireless communication, which is conducive to improving the efficiency of beam sweeping for the plurality of cells by the terminal device, completing rapid beam pairing, and reducing power consumption. The method includes: receiving, by a terminal device, first information sent by a network device, where the network device corresponds to a serving cell of the terminal device, and the first information is used for the terminal device to determine a beam direction of one or both of a first transmit beam and a first receive beam on a first time unit; where the first information includes at least one of: whether transmit beam sweeping performed by a first neighbor cell is synchronized with transmit beam sweeping performed by the serving cell; an offset value of the transmit beam sweeping performed by the first neighbor cell relative to the transmit beam sweeping performed by the serving cell; and beam directions and sending times of a plurality of transmit beams corresponding to one or both of the serving cell and the first neighbor cell.