A downlink scheduler (20) is provided for scheduling the downlink transmission of data cells in a spot beam processing satellite (12). The downlink scheduler (20) includes a beam selector (48) for selecting one of the spot beams associated with the satellite (12), a plurality of wholesale selectors (50)...http://www.google.com.tw/patents/US6738346?utm_source=gb-gplus-share專利 US6738346 - Hierarchical downlink scheduler for a processed satellite payload
