Method of processing epg metadata in network device and the network device for controlling the same

A network device for processing an EPG (Electronic Program Guide) metadata, the network device comprising:

• a service discovery manager configured to perform a services discovery procedure utilizing multiple service discovery metadata components supplied by a service provider, wherein the service discovery manager further configured to:
• receive a master SI table which locates in a master SI table location in provisioning information, wherein the provisioning information includes multiple elements, an EPG provider information element in the multiple elements having both a delivery layer element and an EPG data locator element, the delivery layer element giving a type of delivery layer that is delivered by at least one of an EPG metadata provider's multicast EPG data sources,
• receive a virtual channel map table which locates in virtual channel map locations in the received master SI table,
• receive a virtual channel description table which locates in virtual channel description table locations in the received virtual channel map table, and
• receive a source table which locates in source table locations in the received virtual channel description table;
• and
• a controller configured to process an EPG metadata, wherein profiles for the EPG metadata are classified by 3 sorts of an EPG full profile, an EPG lite profile having less than information in the EPG full profile and an EPG list profile having less than information in the EPG lite profile.