T-mobile Usa, Inc.

Rajesh Gulati

Jeffery A Smith

Ruchir Sinha

Kameswaran Arunachalam

Anandajothi Muttayane

A first time that a Domain Name System (DNS) response message is sent by the gateway server of a network to a user device may be determined, the DNS response message being generated by a Local DNS server of the network in response to a DNS request message from the user device for routing via the gateway server to the user device. A second time that a client handshake message for an external server identified by a network address in the DNS response is received at the gateway server may be determined, in which the client handshake message is sent by the user device. A roundtrip time for the network that is a time difference between the first time and the second time is calculated. The roundtrip trip time is then halved to obtain a network latency time measurement for the network.

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Kirkland, WA, United States of America

Rajesh Gulati