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Point-to-multipoint communication

This article is about radio systems for point-to-multipoint communication. For the general concept, see multicast.
A point-to-multipoint radio base station manufactured by CableFree installed for a wireless internet service provider in Rotterdam. The station has four radio interfaces each connected to a separate sector antenna, each providing 90 degrees coverage. Within 20 km of this base station, customer-premises equipment with high gain directional antennas are installed on sites which can then connect to the base station to receive broadband data connections of typically 10–200 Mbit/s capacity.

In telecommunications, point-to-multipoint communication (P2MP, PTMP or PMP) is communication which is accomplished via a distinct type of one-to-many connection, providing multiple paths from a single location to multiple locations.[1]

Point-to-multipoint telecommunications is typically used in wireless Internet and IP telephony via gigahertz radio frequencies. P2MP systems have been designed with and without a return channel from the multiple receivers. A central antenna or antenna array broadcasts to several receiving antennas and the system uses a form of time-division multiplexing to allow for the return channel traffic.

  1. ^ M. Cover, Thomas; Joy A. Thomas (1991). Elements of Information Theory. Wiley-Interscience. ISBN 0-471-06259-6.
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