International Telecommunication Union The Future Packet-Based Network – Issues & Questions Keith Dickerson Head of Standards, BT ITU-T Workshop on NGN (jointly organized with IETF) Geneva, 1-2 May 2005 Scope ITU-T o Problems with Current Transport Layer Protocols o FPBN Requirements o FPBN Architecture o Questions dates ITU-T Workshop on NGN (jointly organized with IETF) Geneva, 1-2 May 2005 2 Problems with current transport layer protocols ITU-T o Need to support different traffic types o Need to protect control and management planes from o o o o o dates user-plane traffic Need to guarantee and charge for Service Level Agreements Need to ensure emergency services get through Need to provide adequate security Need to identify and locate faults Need to monitor performance ITU-T Workshop on NGN (jointly organized with IETF) Geneva, 1-2 May 2005 3 FPBN Requirements (1) ITU-T The FPBN shall: o provide both connectionless & connection-oriented o o o o o dates services support both public and private network services support an appropriate range of QoS including best effort and guaranteed services allow a smooth migration from current cl-ps and cops networks interwork with current cl-ps and co-ps networks support arbitrary network topologies ITU-T Workshop on NGN (jointly organized with IETF) Geneva, 1-2 May 2005 4 FPBN Requirements (2) ITU-T o secure, protect and transport customer traffic as o o o o o dates appropriate to the requirements of the service detect, and recover from, facility and equipment failures and performance degradation offer comprehensive OAM functions for each plane secure the internal control and management plane traffic from attack offer performance and behavior isolation between different traffic sources and types support lawful intercept ITU-T Workshop on NGN (jointly organized with IETF) Geneva, 1-2 May 2005 5 FPBN Requirements (3) ITU-T o be able to monitor the traffic conditions and bill for o o o o o dates the service delivered be able to distinguish between urgency and importance support services that require in-order delivery of packets support out-of-band control and management planes attempt to keep traffic flowing while recovering from failures only deliver traffic from the intended source to the intended destination(s) ITU-T Workshop on NGN (jointly organized with IETF) Geneva, 1-2 May 2005 6 FPBN Architecture? ITU-T Traffic goes either CL-PS or CO-PS depending on service CL-PS core OOB control/management CO-PS core OOB control/management dates ITU-T Workshop on NGN (jointly organized with IETF) Geneva, 1-2 May 2005 7 Virtual Router ITU-T V Virtual Router V Resource Partition V V V UNI V V V UNI V V per Class Routing/Queuing V V V V V Physical Router dates ITU-T Workshop on NGN (jointly organized with IETF) Geneva, 1-2 May 2005 8 Questions ITU-T o Can FPBN provide QoS cost-effectively for all services? o Can FPBN provide security cost-effectively? o How will the FPBN interwork with MPLS? dates ITU-T Workshop on NGN (jointly organized with IETF) Geneva, 1-2 May 2005 9