canopy

The proprietary Canopy system developed by Motorola is a radio technology for the short and long range. Canopy technology can be considered the precursor to WiMAX. The Canopy system was designed as a cost-effective radio technology for the last mile to provide residential and business customers in rural areas with underserved DSL technology with high-speed radio access to the Internet.

Like WiMAX, Canopy operates in the license-free ISM bands at 900 MHz, 2.4 GHz, 5.25 GHz, 5.45 GHZ (Central Europe) or 5.725 GHz without line-of-sight( NLOS). The maximum radiated power( ERP) is 1 W. Canopy can be used as a point-to-multipoint link in communities and in small or large enterprises, as well as a point-to-point link for bridging longer distances. Data rates are 14 Mbps in multipoint mode and 33 Mbps in P2P mode. Transmission can be encrypted.

The Canopy system consists of the access point( AP), which is connected to the local network via an Ethernet link. The access point cluster (AP cluster) is a high- performance system that includes six access points and a cluster management module( CMM). The Backhaul Module (BH) supports the transmission link from a base station to the backbone and the Subscriber Module( SM) is the access receiver through which accesses to the access points are managed. The Bandwidth and Authentication Manager( BAM) has the tasks ofauthentication and bandwidthprovisioning for each individual user. Another module is the Prizm Element Management System (PrizmEMS), a concentrator that handles acquisition, network monitoring, and fault and element management.