From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <5313B316.701@wirelesspt.net> Date: Sun, 02 Mar 2014 17:39:18 -0500 From: cmsv MIME-Version: 1.0 References: In-Reply-To: Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Subject: [B.A.T.M.A.N.] Network coding multi-hop bandwidth loss Reply-To: cmsv@wirelesspt.net, The list for a Better Approach To Mobile Ad-hoc Networking List-Id: The list for a Better Approach To Mobile Ad-hoc Networking List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: The list for a Better Approach To Mobile Ad-hoc Networking I just found out /(the hard way) that using network coding (batman-adv 2013.4) that i have a massive, unbelievable bandwidth loss if i have more than one hop to the destination I tested this in a real scenario with 11 nodes as well as 3 nodes in a house with 3 floors and having one per each floor. Here is the example with 3 nodes A <------ B -----> C >From node B to iperf reports me 15 mbit >From node B to node C iperf reports me 9 mbit Then, from node C to node A i get values bellow 1 mbit such as 647kbits or less. More than 3 nodes is to forget. uci set batman-adv.bat0.network_coding=0 disables nc and solved the problem which brought the network bandwidth to a more realistic and mathematical acceptable bandwidth level. Is this finding known by others ? -- Site: http://wirelesspt.net Mesh: http://tinyurl.com/wirelesspt Admin: http://wirelesspt.net/wiki/Cmsv Twitter: http://twitter.com/wirelesspt Youtube: https://youtube.com/wirelesspt Facebook: https://www.facebook.com/wirelesspt Suporte técnico via sms: 91 19 11 798 Donativos/Paypal: http://tinyurl.com/doar-verba Chave publica PGP/SSH: http://wirelesspt.net/arquivos/pk Email ao abrigo de: https://creativecommons.org/licenses/by-nc-sa/3.0/pt/