Backhaul (telecommunications)

With backhaul (English repatriation ) is defined as the connection of an upstream, usually hierarchically subordinate node to a central node. The term only describes the function of the connection and does not provide information about the technology used for implementation. It is not identical to the backbone.

Examples

  • The widely distributed base stations ( BTS) of a mobile network need a backhaul to the parent base station controller ( BSC), which is usually implemented as a radio connection or a PCM30 line.
  • The DSLAMs a DSL provider, which are in local exchange or street cabinets, need a backhaul to the nearest ATM or Ethernet nodes.
  • Wi-Fi or WiMAX APs need in turn links to the Internet.
  • For radio and television is referred to as backhaul connection between a reporter team in place with transmission cars ( SNG vehicle ) and the broadcast studio.

Transmission techniques used

Since the term backhaul describes only the logical function, all possible transmission techniques can be used. In practice, depending on the scenario, especially following techniques are used:

  • " Point-to -point" radio or satellite links
  • "Point-to -multipoint " radio links, such as WLAN or WiMAX
  • Line connections are DSL, PDH/SDH-, ATM or Ethernet technology
  • Network Technology
Base Transceiver Station Base Station Subsystem Microwave transmission Asynchronous Transfer Mode
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