公开(公告)号：US11722245B2

公开(公告)日：2023-08-08

申请号：US17971408

申请日：2022-10-21

Applicant: Qinghai Normal University

Inventor： Xiuxiu Liu ,  Xiujuan Du ,  Long Jin

IPC: H04L1/00 ,  H04B13/02

CPC classification number: H04L1/005 ,  H04B13/02 ,  H04L1/0061

Abstract: A data encoding and decoding method for underwater acoustic networks (UANs) based on an improved online fountain code, including: in a build-up phase, subjecting all original packets to sequential encoding according to their serial numbers to generate and send encoded packets with degree 2; merging k original packets to k/8 connected components with a size of 8; performing random encoding until a largest connected component is successfully decoded; in a completion phase, sending, by a receiver, a feedback packet according to a current decoding graph; according to a feedback packet containing decoding states of all the original packets, sending, by a sender, encoded packets with degree m; and randomly selecting original packets for recursive encoding to generate and send encoded packets with degree 1 or 2; and setting, by the receiver, a threshold to restrict the number of feedback packets.