| 摘要 |
<p>A communication system is concerned including an upstream proxy server (102) and two reporting downstream proxy servers (104,112), where the upstream proxy server (102) is capable of multicasting a uniform resource locator (URL) to the reporting downstream proxy servers (104,112), the reporting downstream proxy servers interact with the upstream proxy server (102) to resolve cache misses and the upstream proxy server (102) returns a resolution to a cache miss via multicast (126). A downstream proxy server (104,112) which filters multicast transmissions of URLs and Stores a subset of the URLs for subsequent transmission, where relative popularity is used to determine whether to store a multicast URL. An upstream proxy server (102) capable of multicasting URLs to reporting downstream proxy servers (104,112), where the upstream proxy server (102) interacts with the two reporting downstream proxy servers (104,112) to resolve cache misses and the upstream proxy server (102) returns a resolution to the cache misses via multicast (126).
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