From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <482A54A5.5030302@gmx.net> Date: Wed, 14 May 2008 04:55:33 +0200 From: elektra MIME-Version: 1.0 Subject: Re: [B.A.T.M.A.N.] Multiple radios to improve throughput References: <30773.75.128.50.239.1210728113.squirrel@corp.changind.com> In-Reply-To: <30773.75.128.50.239.1210728113.squirrel@corp.changind.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Reply-To: 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 Hi Shane - if all radios are operating on the same channel you can't expect any improvement. So operate one link on channel 1 and the other on channel 11, 13 or 14 according to the regulations in your country. Channels in the 5 GHz range are even better ;-) Note also that many embedded devices have not enough CPU power to saturate the capacity of a single radio link operating at full speed. At 54 Mbit a single link can have approx. 3 MByte/sec throughput, but we have experienced that a 200 MHz MIPS CPU doesn't provide enough power for more than 1.2 to 1.6 MByte/sec with a single interface depending on the chipset/type of your wifi card. cu elektra > Hello, > > I have a 3 node mesh network with layout as follows: > > node #1 node #2 node #3 > 192.168.2.1 192.168.2.5 192.168.2.9 > > Each node has only one radio and #1 talks to #3 via #2 and vice versa. > If I want to improve the throughput between #1 and #3, logically I would > add another radio to #2 so it can communicate to both #1 and #3 > simultaneously w/o having the single radio switching back and forth > between #1 and #3. > > However, I ran IPERF between #1 and #3 before and after adding the > second radio to node #2 and the bandwidth didn't really improve. > In my node #2 configuration, I did not bridge the two wifi interfaces so > I have ath0 and ath1 with their own IP addresses. All three nodes are > configured with the same channel. My batmand command line for node #2 > is: batmand ath0 ath1. > > Can anyone advise me on what I did wrong? > > Thanks, > Shane > _______________________________________________ > B.A.T.M.A.N mailing list > B.A.T.M.A.N@open-mesh.net > https://list.open-mesh.net/mm/listinfo/b.a.t.m.a.n > >