Abstract
AbstractThis paper examines the potential of satellite systems to carry synchronous digital hierarchy (SDH) transmissions and proposes a possible earth‐station architecture capitalizing on the benefits that SDH equipment offers. It is shown that a range of SDH multiplexing rates are viable over satellite and that multi‐destination operation of satellite systems is facilitated by using the inherent features of the SDH. The use of STM‐1 (155 Mbit/s) and sub‐STM‐1 transmission rates as transmission sections along with appropriate integration of the multiplexing and modem equipment would:.(a) enable SDH path continuity between earth‐stations, allowing the satellite network to be integrated with managed terrestrial networks to form global managed transmission platforms.(b) provide bandwidth and equipment savings at earth‐stations.Several technical issues relating to SDH operation over satellite systems are considered and SDH pointer corruption is examined in some detail.
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