公开(公告)号：US10135947B1

公开(公告)日：2018-11-20

申请号：US15212941

申请日：2016-07-18

Applicant: Amazon Technologies, Inc.

Inventor： Yajun Chen ,  Peng Zhan ,  Qingyuan Ma ,  Zhen Zhou

IPC: H04L29/08 ,  H04W4/06 ,  G06F8/61 ,  H04W76/10

Abstract: A transmission system that sends data to multiple devices simultaneously using multiple access points (APs). The system may send multicast data (e.g., original transmission of multicast data) to the multiple devices using a first AP and may send recovery data (e.g., retransmission of portions of the multicast data) to individual devices using a second AP. As the second AP handles requests for the recovery data and sends the recovery data, the first AP may send the multicast data using all available bandwidth and an efficiency of transmission does not depend on the number of devices connected to the first AP. The recovery data may be determined based on an original manifest of the multicast data, such as a bitmap or other representation, and the device may generate a recovery manifest indicating the recovery data and send the recovery manifest to the second AP.