Factors causing uncertainties in outdoor wireless wearable communications

Wearable computers are becoming increasingly popular as new features emerge and device portability improves-making them suitable for accessing multimedia services on the move. Wireless LANs are compatible with Ethernet and asynchronous-transfer-mode-based fiber-optic networks, providing high mobility to user nodes while integrated and connected to high-speed networks wired with broadband. With a range covering several kilometers, WLANs are advantageous for providing multimedia services to wearable computers. Various factors influence the operation of wirelessly connected wearable computers, but we emphasize the rainfall influence.