A Novel Path Protection Scheme with FEC Path in Connection Oriented Networks

摘要

The QoS provided by today''s best effort Internet is not good enough for real-time premium traffic. It is believed that QoS guarantees could be better provided by the connection oriented networks. Multi protocol label switching (MPLS) is one such technology and these connection oriented networks are inherently more prone to network failures. Conventional path protections perform re-routing to cope with them. However, rerouting always causes packet losses and results in service outage. These losses are bursty in nature and highly degrade QoS of the real-time premium traffic. The novel path protection proposed in this paper recovers the bursty packet losses due to re-routing using forward error correction (FEC) path. It provides the network architecture with no service outage for such traffic. The numerical results show that the proposed method can achieve a very high availability for the real-time premium traffic in future IP/MPLS networks