Firmware download with adaptive lost packet recovery

摘要

Disclosed are methodologies for implementing a firmware download to endpoints in a mesh network. A firmware package is divided into a number of blocks, each block containing a number of packets and sent as a broadcast to endpoints in a wireless mesh network. A number of redundancy packets are sent to permit calculation of lost packets. A maximum number of redundancy packets to be sent is determined and a forward error correction code is developed depending on the maximum number of redundancy packets and the total number of firmware packets to be sent. A first block of redundancy packets, less than the maximum number, is sent followed by additional blocks of redundancy packets depending on reports from the receiving endpoints.

主权项

1. A method for downloading firmware, comprising:
dividing an image of firmware to be downloaded into a plurality of blocks, each block containing a plurality of packets; broadcasting, by at least one transmitting apparatus, the plurality of blocks; appending at least one redundancy packet to the broadcast of each of the plurality of blocks; and computing missing packets within the blocks based on the at least one redundancy packet; wherein the last block of the plurality of blocks is adjusted in length to fit an exact number of packets to be downloaded.