Patent ID: 8688775
Filing Date: 2014-04-01
Classification: H04L

Abstract:
1. A method comprising: generating, with a first Application-Layer Traffic Optimization (ALTO) server that includes a first ALTO client for a second ALTO server, a first ALTO network map that includes a first set of one or more PIDs, wherein each of the first set of one or more PIDs represents one or more endpoints of a first network; generating, with the first ALTO server, a first ALTO cost map that comprises one or more cost entries that each includes a PID pair of the first set of one or more PIDs and a cost value to specify that specifies a cost to traverse a network path through the first network that connects the PID pair of the first set of one or more PIDs; receiving, with the first ALTO client, a second ALTO network map that includes a second set of one or more PIDs, wherein each of the second set of one or more PIDs represents one or more endpoints of a second network; receiving, with the first ALTO client, a second ALTO cost map that comprises one or more cost entries that each includes a PID pair of the second set of one or more PIDs and a cost value that specifies a cost to traverse a network path through the second network that connects the PID pair of the second set of one or more PIDs; generating a master cost map comprising one or more master cost entries that each include (1) a PID selected from the first set of one or more PIDs of the first ALTO map, (2) a PID selected from the second set of one or more PIDs of the second ALTO map, and (3) a cost value that represents a cost to traverse a network path from the PID selected from the first set of one or more PIDs and the PID selected from the second set of one or more PIDs, wherein generating the master cost map comprises determining the cost values of the one or more master cost entries from the cost values of the one or more cost entries of the second ALTO cost map.