Bearer Independent Call Control - ITU：与承载无关的呼叫控制ITU.ppt

GR001017-1Presented by Greg Ratta ( ), ITU-T SG 11 Vice ChairmanApril 26, 2001GR001017-2Outline?Introduction - elements of QoS signalling?Signaling of QoS in B-ISDN?Overview of ?QoS signalling for ?SummaryGR001017-3 ATM Service CategoriesAttributeATM Layer Services CategoriesCBRrt-VBRnrt-VBRABRUBRCLR?CTD and CDVPCR & CDVT?SCR and BTMCRFeedback*CDVT is work characteristic and is not signaled?= network specificGR001017-4Guaranteed Frame Rate (GFR)?Objective: a non-real-time service that provides some mitment while placing minimal constraints on the user?Major Application: Carry aggregate TCP/IP traffic between two routers?User is free to send any rate up to a PCR all the time, mitment is only to an MCR ?GFR service is “frame-based.”GR001017-5Inclusion of QoS parameters in the SETUP message when the QoS class is explicitly requested (QoS value different from 0)QoS parameterQoS class (value)12345Transit delay (NOTE 1)OO2-point CDVOOCLR (CLP=0) (NOTE 2)OOCLR (CLP=0+1) (NOTE 2)OONOTE 1 - Maximum end-to-end transit delay objectives may only be specified for the 2 - The CLR parameter is shown as two entries to indicate explicitly whether mitment is for the CLP=0 or for the CLP=0+1 -6Inclusion of QoS parameters in the SETUP message when the QoS class value is not explicitly requested and the requested ATC is an ATCBroadband bearer capabilityBTC (value)711191216172021QoS parameterQoS class (value)00000000Transit delay (NOTE 1)ONOTE 3ONOTE 3ONOTE 3NOTE 3NOTE 32-point CDVOOOCLR (CLP=0) (NOTE 2)OOOCLR (CLP=0+1) (NOTE 2)OOOOONOTE 3 - Maximum end-to-end transit delay objectives may be specified (though mended) for reasons of patibility with mendations (1995), (1998), (1996), (1997) (1997), (1997) and (1998).GR001017-7Inclusion of QoS parameters in the SETUP message supported for patibilityBroadband bearer capabilityBearer classAX orFRVPCX orFRVPC