Remote Orchestration of NextG Services Across the Global Internet: An Experimental Study.

This paper presents results from an experimental study of next generation services delivered over the global Internet. The experimental platform used for this study is the “COSM-IC” federated testbed which connects the COSMOS 5G/6G edge deployment at Rutgers and Columbia Universities with other international testbeds, including the “Open Ireland” network at Trinity College, Dublin, the CQPD network in Brazil and the JGN testbed in Japan. The experiments reported here use two sites (COSMOS at Rutgers and Open Ireland at Trinity) to conduct experiments aimed at understanding the performance of emerging latency-critical applications from a remote server. Baseline application latency and throughput performance are reported for a file server in Open Ireland and a client in the COSMOS network, showing significant degradation due to the large RTT (112 ms) associated with international connections. Techniques for ameliorating these performance problems are introduced, first at the transport layer using improved versions of TCP, including TCP BBR and a new cross-layer protocol called mmCPTP. A second set of experiments was conducted to evaluate the effectiveness of Container Migration in which application code (service) is dynamically migrated to an edge cloud close to the target user. Significant performance gains in service response time are shown experimentally due to service migration using enhanced transport protocols on the high RTT international connections.