Method for Robust Real-Time Wireless Industrial Communication

摘要

Methods for operating real-time wireless networks enable robust medium access strategies for communicating nodes in the network. A given wireless channel is divided into several sub-carriers, with each node assigned to a subset of sub-carriers. A master wireless node uses different subsets of the sub-carriers to communication with two or more slave wireless nodes simultaneously. The method includes generation of preambles that are robust to interference and multipath conditions. The method also enables communication within a maximum predetermined latency bound.

主权项

1. A method for wireless communication comprising:
generating with a first controller in a master wireless node a first allotment of sub-carriers selected from a predetermined frequency band for communication with a first slave wireless node, the first allotment of sub-carriers including at least two orthogonal sub-carriers; generating with the first controller in the master wireless node a second of allotment of sub-carriers selected from the predetermined frequency band for communication with a second slave wireless node, the second allotment of sub-carriers including at least two orthogonal sub-carriers that are different than the at least two orthogonal sub-carriers in the first allotment; and transmitting with a first transceiver in the master wireless node a first message to the first slave wireless node using only the first allotment of sub-carriers and a second message to the second slave wireless node using only the second allotment of sub-carriers, the first message being different than the second message and the transmission of the first message and the second message occurring substantially simultaneously.