Hierarchical Forwarding Bit Index Explicit Replication (HF-BIER) in Multicast
Xinting Wu, Xiangyang Gong, Qianlin Wu, Xirong Que, Ye Tian · 2019
BIER (Bit Index Explicit Replication) is a novel solution for multicast. Although it has not been applied to real network, without establishing a multicast tree and maintaining per-flow state, BIER has obvious advantages over existing multicast tree-based routing solution. However, we found data redundancy in large-scale network when BIER domain has more than one SDs (Sub Domains) or SIs (Set Ids). In fact, some of them can be decreased. This paper proposed HF-BIER (Hierarchical Forwarding Bit Index Explicit Replication) model which is able to decrease the data redundancy. In order to add multicast control information, we set up Transfer BFR and LL (Logical Level) in HF-BIER model. This paper describes the forwarding mechanism of HF-BIER, and figures out the workflow of control plane and data plane of HF-BIER. Finally, simulation has been made to prove HF-BIER can effectively reduce the forwarding redundancy in the core network and critical links.