I have successfully achieved 6 Mbps on a 802.11b smartbridge device. But I was able to confirm a clean environment and ensured that I had no additional "overhead" traffic floating across the links. It all depends on your network, and the overhead traffic you machines are sending...
-----Original Message----- From: "Oliver Leamy" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Date: Mon, 23 Jun 2003 23:03:26 +0100 Subject: RE: [smartBridges] speed > Sorry, cannot agree with that statement. Just because a system uses > half-duplex does not mean that the speed is halved. It will only be > halved if the acknowledgement packets are of the same length as the > transmission packets and this is very rarely the case. For example, if > you send blocks of 10k and the acknowledgement packet is only 0.1k then > the time spent transmitting will be about 100 times longer than the > time > spent receiving (even considering the time spent switching between > transmit and receive and the overhead in synchronizing. > > We did a lot of tests on this matter to try and determine some rule of > thumb that we could use. We had heard that 60% would be a suitable > value to use, but in our tests we never got above 40% i.e 4Mbps for > 802.11b but and 20Mbps for 802.11g > > The above tests were all carried out in a single room with no other > 2.4GHz equipment turned on within miles (tests were done on islands). > We were getting nearly 100% in terms of signal strength and link > quality. However, there was the possibility of reflections from the > walls of the room causing problems which we had no way of > investigating. > Last week-end we miraculously got in excess of 40Mbps in an outdoor > environment using 'g' equipment over a distance of about 100 meters. > This was noted as an 'accidental' sidebar to a bigger test and we have > not yet had a chance to re-check the figures. > > Hope my ramblings are of some help and did not sow seeds of confusion. > > Oliver Leamy > > Ogenek Teoranta, Ballingeary, Macroom County Cork > +353 (26) 47808 ; +353 (86) 8337664 > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Company 2210 > Sent: 23 June 2003 21:56 > To: [EMAIL PROTECTED] > Subject: Re: [smartBridges] speed > > Yep. Wireless is half duplex, so whatever your getting divide by 2 to > get > realistic full duplex throughput. > > ----- Original Message ----- > From: "Roger Howard" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Monday, June 23, 2003 9:49 PM > Subject: [smartBridges] speed > > > > Is there any way to tell what speed an airBridge is connected at > without > > doing a speed test? If it's connected at 1Mbps am I right in assuming > that > > the actual throughput will be about half that? > > > > Thanks, > > Roger > > > > The PART-15.ORG smartBridges Discussion List > > To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe > smartBridges <yournickname> > > To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe > smartBridges) > > Archives: http://198.63.203.6 > > > The PART-15.ORG smartBridges Discussion List > To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe > smartBridges <yournickname> > To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe > smartBridges) > Archives: http://198.63.203.6 > > The PART-15.ORG smartBridges Discussion List > To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe > smartBridges <yournickname> > To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe > smartBridges) > Archives: http://198.63.203.6 The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://198.63.203.6
