ITWissen.info - Tech know how online

superframe (SF)

Superframes(SF) are larger data packets that are composed of several frames. Such a superframe has a header, the other data packets contained in the superframe have their own headers.

The technique of superframes is used in ATM, Plesiochronous Digital Hierarchy( PDH), ADSL frame and Digital Radio Mondiale( DRM).

  1. In the Plesiochronous Digital Hierarchy (PDH), a frame format at DS-1 is called a superframe. In this, 24 DS-0 time slots and one encoded frame bit are organized as a frame and repeated twelve times.
  2. In TransmissionSystem 1( T1), a superframe consists of 12 frames of 192 bits each. The 193rd bit is used for error control and other functions. The term superframe is replaced by the Extended Superframe( ESF).
  3. In the ADSL frame, the superframe is formed by a total of 68 transmission frames for the useful and control information and one synchronization frame.
  4. In Digital Radio Mondiale (DRM), a superframe is made up of three transmission frames.
    Structure of the DRM frame and the DRM

    Structure of the DRM frame and the DRM

    superframe Each transmission frame is 400 ms long. As a common header, the superframe uses the Service Description Channel( SDC), which contains information about multiplexing. The entire superframe has a length of 1,200 ms.
Informations:
Englisch: superframe - SF
Updated at: 20.11.2012
#Words: 192
Links: service feature (IN) (SF), data, header (HDR), asynchronous transfer mode (ATM), plesiochronous digital hierarchy (WAN) (PDH)
Translations: DE
Sharing:    

All rights reserved DATACOM Buchverlag GmbH © 2024