1. Advanced Network Laboratory @ HUFS Advanced Network Laboratory @ HUFS Multicast Scenarios on ITU-T ( Y.2111 ) 2008.3.27 김 양 중

2. 2/192/19 Advanced Network Laboratory Advanced Network LaboratoryContents Multicast Scenarios on Y.2111 Open IPTV Forum : multicast mechanism Future work & Conclusion

3. 3/193/19 Advanced Network Laboratory Advanced Network Laboratory Resource Control for Unicast and Multicast Elementary functions for multicast processing Multicast Replication Function (MRF): The operation of replicating packets of a multicast group based on the membership tracked by the MCF. A multicast group is identified by the combination of a unicast source address and a multicast destination address, or only by a multicast destination address. Multicast Control Function (MCF): The operation of processing the requests (e.g. IGMP, MLD)for joining or leaving a multicast group and tracking the group membership. It may interact with RACF for the admission control of the requests based on the subscriber information (i.e. multicast access control list and subscribed multicast bandwidth) as well as the QoS-related transport resource information.

4. 4/194/19 Advanced Network Laboratory Advanced Network Laboratory Resource control schemes for multicast services The MCF may interact with the RACF for the following purposes: Request the RACF to perform resource and admission control based on the initial processing of multicast requests (e.g. when the transport node is not already part of requested multicast group) Request the RACF to release related-resources when all end users leave an existing multicast group Notify the RACF of abnormal events (e.g. link failure) Two implementation scenarios are possible in the context of RACF to perform resource control for multicast services: Standalone RACF: multicast resource and admission control is performed in a separate node from MCF. -Co-located RACF: multicast resource and admission control is performed in the same node as MCF.

5. 5/195/19 Advanced Network Laboratory Advanced Network Laboratory Resource control scenarios for Multicast Scenarios 1: TF RACF SCF AN MRF MCF CPE/CPN doesn't send transport signalling (e.g. IGMP). Standalone RACF scheme is suitable for this scenario 1 2 3 4

6. 6/196/19 Advanced Network Laboratory Advanced Network Laboratory Resource control scenarios for Multicast Scenarios 2: TF RACF SCF AN MRF MCF CPE/CPN sends transport signalling (e.g. IGMP). Standalone RACF scheme is suitable for this scenario 1 2 3 4 * At this time the QoS resource in the transport functions is not committed send a transport signalling to the transport function and the reserved resource is committed. 5

7. 7/197/19 Advanced Network Laboratory Advanced Network Laboratory Resource control scenarios for Multicast Scenarios 3: TF RACF SCF AN MRF MCF SCF is not involved and the CPE/CPN initiates a multicast service request by transport signalling (eg. IGMP). Co-located RACF scheme is suitable for this scenario 1 2 3

8. 8/198/19 Advanced Network Laboratory Advanced Network Laboratory Multicast admission control The interaction between top-tier TRC-FE and co-located TRC-FE through Rp reference point

9. 9/199/19 Advanced Network Laboratory Advanced Network Laboratory Cont’d CPE TRC-FE located in AN RACF 2. Resource admission control 5. Resource admissi on control 9. Stop replication 1. Multicast request 3. Multicast flow with low priority 4. Resource request 6. Resource Resp onse 7. Multicast flow with r emarked priority 8. Resource Relea se 10. Resource Release request

10. 10/1910/19 Advanced Network Laboratory Advanced Network Laboratory OIF Multicast Scenarios Entities Transport Access Node (e,g. DSLAM) Transport Remote Node (e,g. IP edge) Aggregation

11. 11/1911/19 Advanced Network Laboratory Advanced Network Laboratory OIF RAC Architecture

12. 12/1912/19 Advanced Network Laboratory Advanced Network Laboratory Call flow