Beam Training System for Millimeter Wave Directional Communication
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Solution Overview
Problem
The implementation of 60 GHz millimeter wave wireless networks is hindered by high free space propagation loss, penetration, reflection, and scattering losses, as well as sensitivity to environmental influences, leading to unstable connections and poor communication performance.
Innovation Solution
The use of beam training processes that involve determining the direction of arrival for signals to focus communication beams, allowing for directional wireless communication by transmitting reduced or complete sets of beam training sequences based on signal quality, and employing multi-element antenna systems with beam steering capabilities to maximize signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam training is performed using a complete set of directional training beams to ensure comprehensive coverage, then the reliability of directional communication is improved, but the training overhead and time consumption increase
Solution Approach 1:
The system performs direction of arrival estimation before beam training to pre-determine the likely direction of the communication partner. This preliminary action allows the beam training process to focus only on relevant directions rather than exhaustively searching all possible directions, significantly reducing training time while maintaining reliable directional communication establishment.
2Productivity
If a reduced set of beam training sequences is used to decrease training overhead, then the productivity of beam training is improved, but the reliability of beam direction determination may deteriorate
Solution Approach 1:
Direction of arrival estimation is performed as a preliminary step to identify the most probable direction of the communication partner before initiating beam training. This allows the system to reduce the beam training set to only those directions that are likely to be relevant, maintaining high beam direction accuracy while significantly improving beam training efficiency by avoiding unnecessary training sequences in unlikely directions.
3Loss of time
If direction of arrival estimation is performed to enable focused beam training, then the loss of time in beam training is reduced, but the complexity of the signal processing increases
Solution Approach 1:
The system performs direction of arrival estimation as a preliminary step using signal processing techniques on the received training sequences. This estimation provides initial direction information that guides the subsequent focused beam training process, reducing the overall beam training duration despite the added signal processing complexity in the preliminary estimation step.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the range and quality of wireless communication in the mmWave band by focusing signals towards the best beam direction, reducing training overhead and improving overall Quality of Service (QoS) by overcoming path losses and environmental impacts.
Implementation Method 1
employing multi-element antenna systems with beam steering capabilities to maximize signal-to-noise ratio
Implementation Method 2
focusing signals towards the best beam direction
Implementation Method 3
determining the direction of arrival for signals transmitted from other apparatuses
Data Source
AI summary
A system for configuring antenna systems for selecting directional communication signals corresponding to other apparatuses. Apparatuses having activities that require directional wireless communication may search for other apparatuses that can fulfill these requirements. This search may include, for example, the transmission of wireless messages requesting a set of communication beams usable for beam training (for example, one or more beam training sequences). Other apparatuses that are able to satisfy the requirements of the searching apparatus may respond to the request message by transmitting a message that comprises at least information usable for configuring beam training configuration in the apparatus.