Radio Network Controller

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UMTS -
network elements

A Radio Network Controller ( RNC ; German radio network control means ) is a network element of the digital UMTS - Mobile network .

General

Several UMTS base stations ( Node B ) are connected to a radio network controller . The interface between an RNC and a Node B is called the Iub interface. An RNC, together with the Node Bs connected to it, forms a Radio Network Subsystem (RNS). RNC or RNS are connected to the UMTS core network. The interface between RNC or RNS and the UMTS core network is the Iu interface.

tasks

The main task of a radio network controller is to manage the Node Bs connected to it and their radio resources. This includes the management of the codes for the WCDMA channels, the regulation of the transmission power (power control) and the initiation and coordination of the cell change ( handover ). Unlike the Base Station Controllers of the GSM network, which correspond to the Radio Network Controllers in the UMTS network, neighboring RNCs can be networked with one another via the Iur interface. The Iur interface is essentially required for the so-called soft handover .

In order to obtain a basis for decision-making for power control and handover, level and quality measurements are carried out by the mobile station and base station and the measurement results are communicated to the RNC.

roll

  • Controlling RNC - An RNC takes on the role of the so-called controlling RNC with respect to the Node Bs connected to it, for which it manages the radio resources. There is exactly one Controlling RNC for each Node B.
  • Serving RNC - In relation to a connection between user equipment (UE) and the UTRAN, an RNC takes on the role of the serving RNC. The serving RNC manages the connection between the UE and UTRAN and controls the Iub interface for the UE. There is exactly one serving RNC for each UE with a connection to the UTRAN.
  • Drift RNC - An RNC in the role of a drift RNC supports a serving RNC with radio resources managed by it.

literature

  • TL Singal: Wireless Communications. Tata McGraw Hill Education Privat Limited, New Delhi 2010, ISBN 978-0-07-068178-1 .
  • Jukka Lempiäinen, Matti Manninen (Eds.): UMTS Radio Network Planning, Optimization and QOS Management. Springer Science + Business Inc, Dordrecht 2004, ISBN 1-4020-7640-1 .
  • Klaus David, Thorsten Benkner: Digital mobile radio systems. BG Teubner Verlag, Stuttgart 1996, ISBN 978-3-322-92768-2 .

See also

Web links