Parallel Multi-Antenna Beamforming Training for Millimeter-Wave Sector Sweep
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Solution Overview
Problem
The existing beamforming training process in millimeter-wave communication is inefficient due to the sequential sweeping method used by initiators with multiple antennas, which consumes a long time and reduces efficiency during the sector level sweep phase.
Innovation Solution
Implementing a multi-antenna parallel receiving manner in the responder's sector sweep process, where the initiator sends training frames using multiple antennas or radio frequency chains simultaneously, allowing for parallel omnidirectional reception and improving the efficiency and robustness of the sector sweep.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sequential sweeping is used by the initiator with multiple antennas, then the beamforming training can be completed with simple hardware configuration, but the sector sweep time is excessively long and efficiency is reduced
Solution Approach 1:
The patent merges multiple antenna operations into parallel execution. Specifically, the initiator uses multiple antennas (first antenna and second antenna) to transmit training frames simultaneously in different sector directions, while the responder uses multiple receive beams to receive these frames in parallel. This combining of multiple transmission and reception resources resolves the contradiction by achieving both high productivity through parallel processing and acceptable time loss through coordinated multi-antenna operation.
Solution Approach 2:
The patent introduces spatial dimensionality by utilizing multiple antennas and multiple receive beams operating in different spatial directions simultaneously. Instead of sequential time-based sweeping, the system employs spatial parallelism where the initiator transmits on multiple antennas across different dimensions and the responder receives using multiple beams oriented in different spatial directions, thereby transforming the problem from time-sequential to space-parallel execution.
2Reliability
If parallel omnidirectional reception is implemented with multiple antennas, then the reception diversity and robustness are improved, but the device complexity increases
Solution Approach 1:
The patent segments the reception function into multiple independent receive beams, each associated with a specific antenna and spatial direction. The responder divides its reception capability into first receive beam and second receive beam, where each beam independently processes signals from specific sector directions. This segmentation allows the system to achieve reception diversity and robustness through multiple parallel reception paths while managing device complexity by organizing the multi-antenna system into modular, independently controllable beam units.
Data Source
AI summary
In an ISS process, the initiator sends a first SSW frame in different sector directions by sequentially using an antenna in m antennas, where m is not less than 1 and is less than or equal to N, and in an RSS process, the initiator receives a second SSW frame in a parallel (e.g., simultaneous) omnidirectional manner by using M antennas, where the second SSW frame is sent by a responder in different sector directions, each second SSW frame carries information used to indicate a first SSW frame with best quality in the ISS process, and the M antennas include at least the m antennas, and determines an optimal transmit beam in the ISS process based on the received second SSW frame.