System and method for caching an electronic program guide

Abstract

A method for caching an electronic program guide on a portable device commences by downloading channel information and program information to the portable from a local cache when the local cache contains relevant information. However, if the local cache lacks such information, the portable device downloads the channel information and program information from a server. The portable devices then builds a channel index and a program index from the downloaded channel information and program information, respectively to establish the electronic program guide on the portable device.

Dependencies are inferred from the claim text.