Patent ID: 7536622
Filing Date: 2009-05-19
Classification: H04L

Abstract:
1. A method for data repair in a point-to-multipoint communications system, the method comprising: transmitting data from a sender to a plurality of receivers via a point-to-multipoint session; determining if any expected data was not received; if some expected data was not received, sending a data repair request to the sender requesting that the expected-but-not-received data be resent; retransmitting from the sender all of the requested expected-but-not-received data via the point-to-multipoint session; after the sender retransmits the requested expected-but-not-received data, if some data was still not received, scheduling point-to-point repair sessions for specific receivers that expected data that was not received; and sending data still not received to the specific receivers via point-to-point sessions according to the point-to-point repair session schedule.