Rate adaptive transmission of wireless broadcast packets

摘要

Mechanisms are provided for broadcasting data to a plurality of receiver devices. A data broadcast transmission rate and a level of error correction to be used when broadcasting data are determined based on prior feedback received from the plurality of receiver devices. The feedback comprises channel condition information specifying conditions of one or more connections of a channel over which data was previously broadcast to the receiver devices. Data to be broadcast to the plurality of receivers is encoded in accordance with the determined level of error correction. The encoded data is broadcast at the determined data broadcast transmission rate over the channel to the plurality of receiver devices.

主权项

1. A method, in a data processing system, for broadcasting data to a plurality of receiver devices, comprising:
receiving, from a plurality of receiver devices, feedback information comprising channel condition information specifying conditions of one or more connections of a channel over which data was previously broadcast to the receiver devices; determining, by the data processing system, a data broadcast transmission rate and a level of error protection to be used when broadcasting data, based on the feedback information received from the plurality of receiver devices; encoding, by the data processing system, data to be broadcast to the plurality of receiver devices in accordance with the determined level of error correction by encoding the data using bounded Luby Transform (LT) codes (BLC) error protection encoding in which a number of data packets generated for a block of data is dynamically determined based on the channel condition information; and broadcasting, by the data processing system, the encoded data at the determined data broadcast transmission rate over the channel to the plurality of receiver devices.