Abstract
The preconfigured protection cycle ($p$-cycle) approaches have been well studied
for unicast traffic protection, but have been rarely applied to multicast traffic
protection. In this paper, we first examine two integer linear programming (ILP) based
heuristic algorithms, including spare capacity optimization of $p$-cycle-based tree
protection (SOPT) and segment protection (SOPS), We also extend spare capacity
optimization of $p$-cycle-based link protection (SOPL) and the efficiency ratio based
unity-$p$-cycle heuristic algorithm (ERH) earlier proposed for unicast traffic
protection to multicast traffic protection. In order to achieve the least total network
resource consumption, we further consider a joint optimization design of $p$-cycle-based
link protection (JOPL) and a nonjoint optimization design (NJOPL). We show that,
compared with other multicast traffic protection schemes, the JOPL design consume the
least total capacity, while the ERH design is the fastest in the computation speed.
© 2008 IEEE
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