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Precise UPC Scheme Suitable for ATM Networks Characterized by Widely Ranging Traffic Parameter Values
Naoaki YAMANAKA Youichi SATO Ken-ichi SATO
IEICE TRANSACTIONS on Communications
Publication Date: 1992/12/25
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Communication Networks and Service
ATM, B-ISDN, UPC, policing, traffic management,
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This letter proposes a new UPC (Usage Parameter Control) method suitable for monitoring/controlling the ATM cell streams of VCs (Virtual Channels) and VPs (Virtual Paths) specified with a wide-range of traffic parameter values. The method, named the 2-phase T-X method, combines two credit window type monitoring circuits that are shifted in phase by T/2. The proposed method achieves the best of both the DB and T-X methods. Its cell mis-policing rate is very low (equivalent to that of the DB-method) while its minimal hardware requirements are equal to those of the T-X method. The proposed method ensures more effective network resource (link) utilization. As a result, the proposed method is shown to be a credible UPC technique for handling broadband VBR (Variable Bit Rate) traffic in ATM based multimedia networks.