Asynchronous Transfer Mode (ATM) Broadband ISDN (B-ISDN)

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Signalling and SVC EstablishmentRequest Routing© 2005 Petr Grygarek, Advanced Computer Networks Technologies20
Building of SVC• Messages similar to ISDN signalling• VPI = 0, VCI V I = 5• Request contains peer endpoint’s ATM address and QoSparameters required• Switch-by-switch request forwarding and VC establishment• building of switching tables in ATM switches• routing needed to find way to the opposite endpoint• if no resources available on some path, request backtracks andtries to find another route (cranckback)• final destination either accepts or rejects the connection request• Routes calculated based on topology information andGeneric Connection Admission Control (GCAC)algorithm• GCAC used to guess whether ATM switch accept anotherconnection or not© 2005 Petr Grygarek, Advanced Computer Networks Technologies21
Page 1 and 2: Asynchronous Transfer Mode(ATM)Broa
Page 3 and 4: Statistical multiplexing principlec
Page 5 and 6: ATM Endpoints• (Workstations)•
Page 7 and 8: VPI and VCI• VPI+VCI together ide
Page 10 and 11: ATM layers and reference model© 20
Page 12 and 13: ATM Reference model planes• Contr
Page 14 and 15: ATM layer• Switches cells accordi
Page 16 and 17: ATM QoS© 2005 Petr Grygarek, Advan
Page 18 and 19: Examples of ATM VC QoS parameters
Page 22 and 23: Connection request routing protocol
Page 24 and 25: Usage of ATM for Data Transfers© 2
Page 26 and 27: LAN Emulation• Gives to stations
Page 28 and 29: LAN Emulation Client (LEC)• entit
Page 30 and 31: Broadcast and Unknown Server(BUS)
Page 32 and 33: Classical IP over ATM(CLIP)© 2005
Page 34 and 35: ATM position today• Telco company

Asynchronous Transfer Mode (ATM) Broadband ISDN (B-ISDN)

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