Patent ID: 8990429
Filing Date: 2015-03-24
Classification: H04L,H04W

Abstract:
1. A hypertext transport protocol (HTTP)-based synchronization method comprising: obtaining a first response from a source server or a cache in response to an HTTP request to obtain a file, wherein the first response defines a date value and an age value; after obtaining the first response, determining that the age value is a valid value for an age field; computing a first time based on the date value and the age value, wherein the date value corresponds to a date when the first response was sent and is specified in a local time of the source server; converting the first time to a local time of a client based upon a second time that is a local time of the client at which an event associated with the first response occurs at the client; computing a difference between the second time and the first time to thereby determine a time offset between a clock of the source server and a clock of the client; and setting up, by the client, a synchronization relationship between the client time and the server time.