Multi-Beam Data Communication Timing Alignment for 60 GHz WLAN
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high-frequency 60 GHz wireless local area networks, the tolerance range for time misalignment between signals transmitted using different beams is small, leading to reduced data communication efficiency due to interference and signal reception issues when time differences exceed the guard interval.
Innovation Solution
A method and apparatus that utilize time adjustment information to synchronize the sending moments of signals using multiple beams, ensuring they arrive simultaneously at the access point within a tolerable time difference, thereby improving data communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If multiple beams are used for data communication in high-frequency 60 GHz system, then interference between beams is reduced, but the tolerance range for time misalignment becomes very small, causing signal reception problems when time differences exceed the guard interval
Solution Approach 1:
The access point performs preliminary measurement of time differences for signals from different stations using reference signals before actual data transmission. Based on these measurements, the access point calculates and notifies time adjustment information to each station in advance, allowing stations to pre-adjust their sending moments. This preliminary action ensures that when data transmission occurs, all signals arrive at the access point within the guard interval, preventing reception failures while maintaining the benefits of multi-beam communication.
2Productivity
If stations send data using multiple beams simultaneously, then data communication efficiency is improved, but time misalignment causes signals to arrive at different times, reducing communication reliability
Solution Approach 1:
The system implements a feedback mechanism where the access point measures time differences using reference signals, calculates the required time adjustments, and notifies each station of its specific time adjustment information. Stations then apply these adjustments when sending data. This closed-loop feedback ensures that even though stations transmit simultaneously using multiple beams, all signals arrive at the access point within the acceptable time window, maintaining both high efficiency and reliability.
Data Source
AI summary
This application provides a data communications method and apparatus. The method includes: A first STA receives time adjustment information, where the time adjustment information is used to indicate a sending moment at which a signal is sent by using each of at least two beams. The first STA may send data at a corresponding sending moment based on the time adjustment information by using a corresponding beam. In this way, an AP can simultaneously receive data sent by at least one station by using the at least two beams. This ensures data validity and improves data communication efficiency.