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Coexistence between SensiNet and 802.11 Wi-Fi Networks
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From Sensicast Systems, Inc.
In typical installations, SensiNet® will interfere with less than 1% of 802.11 packets. SensiNet utilizes the following strategies to coexist with 802.11: Radio selection: SensiNet uses an IEEE 802.15.4 radio. This radio was specifically designed by the IEEE 802 group to minimize interference with IEEE 802.11. Collision avoidance: The 802.15.4 medium access protocol was specifically designed by the IEEE 802 group to minimize interference with 802.11. Low duty cycle: Very little data is transmitted in a typical Sensicast network. In a typical site with 100 wireless sensors, 4 mesh repeaters, and one gateway, a Sensicast radio is transmitting somewhere in the network about 2% of the time. Randomized frequency use: SensiNet's low duty cycle is spread across 16 channels, further reducing the worst-case opportunity for interference to less than 1%. Adaptive frequency use: The Sensicast protocol will avoid problematic channels, causing the system to avoid using channels exhibiting 802.11 cross-interference. Staccato transmissions: Transmissions from the Sensicast system are very short, enabling 802.11 to quickly recover in the event of lost packets. Products & Services
Network equipment is used to split, switch, boost, or direct packets of information along a network. This product area includes network hubs, switches, routers, bridges, gateways, multiplexers, transceivers and firewalls. Often, network equipment is defined by is protocol or port type (e.g., Ethernet switch, USB hub).
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Network bridges connect one network to another so that terminals on both networks can communicate as if on a single network.
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Network routers are protocol-dependent devices that connect subnetworks. They are also used to break down a large network into smaller subnetworks.
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Network gateways interconnect networks with different, incompatible communication protocols.
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Networking repeaters regenerate incoming electrical, wireless or optical signals to preserve signal integrity and extend the distance over which data can travel. They are often used to connect cable segments in IEEE 802.3 networks.
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Product Announcements
Topics of Interest
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Overview
Jing Zhu, Sumit Roy
Department of Electrical Engineering
University of Washington, Seattle, WA 98195
{zhuj,roy} @ee.washington.edu
Xingang Guo, and W. Steven Conner
Communications...
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The changes in wireless technology for data networks over the
past five years have been more dramatic than the changes in
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