DSND: Delay-Sensitive Network Design Scheme for Multi-Service Slice Networks

This letter proposes a delay-sensitive network design scheme, DSND, for multi-service slice networks. DSND contributes to a virtual processing system where users can share the same application space regardless of distance-related delays. DSND introduces the service slice and service virtual time concepts. A service slice is a virtual network comprising user and server nodes. A service virtual time is a time for eliminating the difference in delay caused by distance, and the user’s events are reordered in occurrence order. The difference between the current time and the service virtual time is the end-to-end delay shared by all users within the same service slice. We formulate DSND as an integer linear programming problem and compare the delays between DSND to a benchmark scheme where each user selects the closest server. Numerical results indicate that DSND can reduce the delay by 4–38 percent compared to the benchmark scheme.