Feng Gang National Laboratory of Communication,UESTC Aug 2017 Ver 1.4 Principles for QOS Guarantees (more) 。 Cannot support traffic beyond link capacity PRINCIPLE 4:Need a Call Admission Process;application flow declares its needs,network may block call if it cannot satisfy the needs 1Mbps 1.5 Mbps R2 H2 H4 1 Mbps 2616009:Network Traffic Engineering 7:IntServ and DiffServ Page.72616009: Network Traffic Engineering Feng Gang National Laboratory of Communication, UESTC Aug 2017 Ver 1.4 7: IntServ and DiffServ Page.7 Principles for QOS Guarantees (more) • Cannot support traffic beyond link capacity • PRINCIPLE 4: Need a Call Admission Process; application flow declares its needs, network may block call if it cannot satisfy the needs