Wireless communication method and system with collision avoidance protocol

摘要

A method for providing wireless communication between a source node and a destination node in a wireless network wherein the wireless network uses a time division multiple access (TDMA) protocol. One or more dedicated TDMA transaction timeslots are arranged in a superframe. The superframe includes at least one dedicated transaction slot forming a hybrid protocol with two or more shared transaction slots per superframe. The method is of particular advantage when practised with a WirelessHART protocol wireless sensor network and when used for monitoring and control equipment and processes in an industrial installation. A computer program, and a wireless node and a wireless network using the inventive method are also disclosed.

主权项

1. A method for providing wireless communication between a source node and a destination node in a wireless sensor network, wherein said wireless sensor network uses a time division multiple access (TDMA) protocol having a superframe, the method comprising:
transmitting, by the source node, said superframe comprising at least one dedicated transaction slot and at least two shared transaction slots, at least one of said shared transaction slots having at least two backoff CCA slots wherein when the source node has a burst packet to be transmitted, the source node chooses a random CCA slot from 1 to CCANo, performs CCA channel sensing in the chosen CCA slot, and provides dual backoff in a form of a backoff based on said shared transaction slots and a backoff based on said CCA slots if the source node detects that the channel is not idle on performing the CCA channel sensing.