DISPOSITIVO PER L'IMPLEMENTAZIONE DELLE FUNZIONI DI PROTOCOLLO DEL LIVELLO ATM IN UNA RETE B-ISDN

摘要

Device (ATM_LM) for the conversion into ATM cells of information segments (SAR_PDU) coming from an higher adaptation layer (AAL) and accompanied by connection and application identification parameters (ID_AAL.ID_SSCS), as well as for the reverse conversion, from ATM cells coming from an ATM layer and including channel (VCI) and path (VPI) identifications, into information segments including connection and application identification parameters (ID_AAL.ID_SSCS). It includes a traffic forming or shaping unit (ATMU) controlling the sequence of ATM cells transmission to the ATM layer according to parameters contained in a memory unit (SHAPER_RAM). These parameters relate to traffic profiles of each connection of the higher adaptation layer (AAL) and are updated by a microprocessor (CONTROL_ mu P) as number and characteristics of these connections vary.