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IEEE 802.11 Communications Test for Robotic Systems

Abstract : Designing a robust communications structure needed in a robotic system often leads to many difficulties and compromises due to design constraints. Some of the capabilities of an 802.11 Ethernet radio modem can suffer as a direct result of compromises made to allow a robotic system to operate effectively within its established parameters. This was the case in the Man Portable Robotic System (MPRS) project, funded by the Army. The Urban Robot (URBOT) developed under this project had many specific user requirements, which led to challenging problems when designing the communications system. A communications test was conducted to determine the baseline capabilities of the BreezeNET PRO.11 modems that are currently being used in the URBOT. Tests conducted measured the received throughput under different circumstances, such as multi-hop, multi-node, multicast, and variable antenna height and range. Results show that under some circumstances throughput improvements are possible. Lessons learned from the outcome of the communications test will help in designing an improved communications system for future projects.