Application-layer traffic optimization service map updates

摘要

Using the ALTO Service, networking applications can request through the ALTO protocol information about the underlying network topology from the ISP or Content Provider. The ALTO Service provides information such as preferences of network resources with the goal of modifying network resource consumption patterns while maintaining or improving application performance. This document describes, in one example, an ALTO server that implements enhancements to the ALTO service to enable initiating incremental updates of network and cost maps to ALTO clients upon receiving status information from a content delivery network (CDN) node.

主权项

1. A method comprising:
aggregating, by an application-layer traffic optimization (ALTO) server that stores network topology information for a network of a plurality of endpoints that provides a service, the plurality of endpoints into a plurality of provider-defined identifiers (PIDs), wherein each PID of the plurality of PIDs includes one or more endpoints of the plurality of endpoints; generating, by the ALTO server, an ALTO map for the service that includes representations of each of the PIDs and outputting the ALTO map to a client of the ALTO server; receiving, by the ALTO server, a status update for an endpoint of the plurality of endpoints that comprises information indicating a condition of the endpoint that affects a performance of the endpoint with respect to the service; generating, by the ALTO server and based on the status update for the endpoint, an updated ALTO map and an incremental map revision, wherein the incremental map revision is based at least on a difference between the ALTO map and the updated ALTO map and enables the client of the ALTO server to conform the ALTO map to the updated ALTO map to account for the received information for the endpoint without receiving the updated ALTO map from the ALTO server; and sending, by the ALTO server to the client, the incremental map revision without sending the updated ALTO map.