Fault-tolerant resource allocation model for service function chains with joint diversity and redundancy

This paper proposes an optimization model to derive a resilient virtual network function allocation in service function chains aiming to reduce the end-to-end (E2E) latency during the migrations from the primary functions to backup functions. The model considers -fault tolerance assurance and the satisfactions of service requirements under different error patterns in this model. The allocation provided by the proposed model ensures that the processing ability satisfies the requirements even though there are