BTW, this is what gets lots of people in trouble. Quoting 16-18 mesh nodes per square mile may be a correct number in AZ or TX. You may need 3 times that in my neck of the woods here in NE USA. Even more where interference shrinks cell sizes. Be cautious John. Brad
-----Original Message----- From: John J. Thomas [mailto:[EMAIL PROTECTED] Sent: Saturday, February 25, 2006 2:22 PM To: WISPA General List Subject: Re: [WISPA] Mesh Equipment Yes, unfortunately, the Cisco mesh is only using 5.8 for backhaul right now. Since they recommend 16-18 mesh boxes per square mile, 5.25 GHz and up would be a much better choice.... John >-----Original Message----- >From: Jack Unger [mailto:[EMAIL PROTECTED] >Sent: Wednesday, February 22, 2006 08:41 PM >To: 'WISPA General List' >Subject: Re: [WISPA] Mesh Equipment > >Tom, > >You make a very good point that 5.3 GHz should be used wherever possible >while reserving 5.8 for longer-distance backhauling and supercell use. >We should all be thinking in terms of using 5.3 whenever we can and >reserving the higher-power 5.8 authorization for those situations where >we really, really need it. > jack > >Tom DeReggi wrote: > >> Or realize that everyone in the world is using the precious 5.8Ghz >> spectrum already for long critical links, that are limited to 5.8Ghz for >> PtP rule higher SU antenna, or long distance. >> 5.3Ghz is an ideal backhaul channel for MESH, up to 7 miles (with 2 ft >> dish), and avoid the interference headaches. There is now a HUGE range >> of spectrum available at 1 watt, the 5.3G and 5.4Ghz newly allocated >> 255Mhzspectrum usable as if this past January. Design mesh networks to >> utilize these many channel options, avoid interference, and don't >> destroy the industry by unnecessisarilly using the precious 5.8Ghz. In >> a MESH design its rare to need to go distances longer than 2 miles, all >> within the realm of possibility with low power 5.3G and 5.4G and Omnis >> and relatively small panel antennas. >> >> Likewise, reserve the precious 2.4Ghz for the link to consumer, the >> spectrum supported by their laptops. I hope to see the industry smart >> enough to use the new 5.4Ghz for MESH type systems, which is one of the >> reasons it was allocated for. >> >> One of the most important tasks for WISPs is to conserve the 5.8Ghz >> spectrum and only use it when needed. It is in shortage most compared >> to the other ranges. I had hoped and lobbied hard that half of the >> 5.4Ghz range would be allowed for higher power and PtP rules, but it had >> not. Its still perfect for mesh and OFDM. Don;t be fooled into believing >> high power is the secret weapon for mesh, as it is not, LOW power is. >> Interference and noise is accumulative and travels for miles around >> corners and obstructions, unlike good RSSI and quality signal. Get >> better RSSI in MESH, by Reducing self interference and noise, by using a >> wider range of channel selections and lower power. 5.3 and 5.4 gives >> you 350Mhz to select channels from, of equal specification/propertied >> RF. Design it into your MESH design. If you can't transport it in >> 1watt, redesign radio install locations and density. Every single >> additional non-inteferring channel selection, drastically logrithmically >> increases the odds of getting a non-interfering channel selection. 5.4G >> is the best thinng that happened to MESH. Unfortuneately, worthless for >> super cell design. But if MESH embrases 5.4 like it should, it leaves >> 5.8Ghz for Super cell. Otherwise the MESH designer is destined to fail, >> because it will become a battle that the Super Cell guy won't be able to >> give up on until his death, as he has no other option but the range he >> is using. The mesh provider has options. >> >> Tom DeReggi >> RapidDSL & Wireless, Inc >> IntAirNet- Fixed Wireless Broadband >> >> ----- Original Message ----- From: "Jack Unger" <[EMAIL PROTECTED]> >> To: "WISPA General List" <wireless@wispa.org> >> Sent: Wednesday, February 22, 2006 6:29 PM >> Subject: Re: [WISPA] Mesh Equipment >> >> >>> Unless you expect to handle only very low levels of traffic, avoid >>> mesh nodes with only one radio. Choose nodes that have one radio on >>> 2.4 GHz for customer connections and one radio on 5.8 GHz for >>> backhauling. In other words, separate the "access" traffic from the >>> "backhaul" traffic. Your overall throughput capability will be many >>> times greater. >>> >>> jack >>> >>> >>> ISPlists wrote: >>> >>>> Does anyone have a good recommendation on some Mesh equipment. I >>>> have a small town that wants to provide Internet access to the entire >>>> town and I'm thinking of using mesh technology. Any ideas would be >>>> great. >>>> Thanks, >>>> Steve >>>> >>> >>> -- >>> Jack Unger ([EMAIL PROTECTED]) - President, Ask-Wi.Com, Inc. >>> Serving the License-Free Wireless Industry Since 1993 >>> Author of the WISP Handbook - "Deploying License-Free Wireless WANs" >>> True Vendor-Neutral WISP Consulting-Training-Troubleshooting >>> Phone (VoIP Over Broadband Wireless) 818-227-4220 www.ask-wi.com >>> >>> >>> >>> -- >>> WISPA Wireless List: wireless@wispa.org >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> > >-- >Jack Unger ([EMAIL PROTECTED]) - President, Ask-Wi.Com, Inc. >Serving the License-Free Wireless Industry Since 1993 >Author of the WISP Handbook - "Deploying License-Free Wireless WANs" >True Vendor-Neutral WISP Consulting-Training-Troubleshooting >Phone (VoIP Over Broadband Wireless) 818-227-4220 www.ask-wi.com > > > >-- >WISPA Wireless List: wireless@wispa.org > >Subscribe/Unsubscribe: >http://lists.wispa.org/mailman/listinfo/wireless > >Archives: http://lists.wispa.org/pipermail/wireless/ > -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ This mail passed through mail.alvarion.com **************************************************************************** ******** This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. **************************************************************************** ******** This mail passed through mail.alvarion.com **************************************************************************** ******** This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. **************************************************************************** ******** -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
