A fast and efficient backup routing scheme with bounded delay guarantees

Reliable transmission is essential for several real-time applications. Backup channels introduce the notion of availability at the cost of increasing the use of network resources. However, this over provisioning of resources is potentially wasted, since packet delays are usually lower than the required end-to-end channel delay. The goal of this paper is to present a new scheme for obtaining the primary and backup paths maximizing the admission of channel in a network. This paper uses a new failure detection scheme for selecting the primary and backup paths denominated proactive backup channel. This scheme is based on activating the backup channel before a fail is produced. The experiments show that using this new scheme the admission rate (the number of channels a network can accept) is improved considerably. The paper also presents the application of this scheme to IP networks using TCP trunking