10Mbps to 100Mbps works for 3G services, but 4G requires 100Mbps per base station... with multiple base stations per tower you're looking at 500Mbps. TDM is then desires on top of that because the carriers still have a lot of equipment running on TDM type services. So the RFP's you have seen might not reflect this now, but long term they will. I do agree though, LTE/4G is all Ethernet based, TDM is only desired for legacy support during the transition.
I think Sprint/Clearwire is showing where the future of the industry is going... they are now making huge investments in 1Gbps microwave radios from Bridgewave and E-band (although Bridgewave I think will win out since they can also carry Sprints TDM traffic natively). Daniel White 3-dB Networks http://www.3dbnetworks.com [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Matt Liotta Sent: Wednesday, December 23, 2009 7:25 PM To: WISPA General List Subject: Re: [WISPA] Wireless backhauls for Cell Carriers That doesn't seem inline with any of the RFPs. Generally speaking, the carriers that want TDM only want it for voice and generally don't require more than 5 T1s for voice. Almost all of the carriers now seek Ethernet for for data. Almost always, the request is between 10Mbps and 100Mbps per tower. Not to say that it is easy. CDMA-based carriers for example have stringent clocking requirements for their TDM that doesn't appear solvable with TDD radios. Further, the carriers that want Ethernet want straight layer2 between their tower and MSO. This generally means that the aggregate amount of backhaul exceeds radio capability the further away from the MSO you get. Unless you have a fiber partner or have fiber yourself then forget it. -Matt On Dec 23, 2009, at 6:06 PM, 3-dB Networks wrote: > Don, > > Unless your backhaul can support TDM natively and can deliver over > 500Mbps > just to them (which from what I understand the carriers are really > believing > they will need), I don't think the average carrier would be > interested in > collocating if that is what you were thinking of. > > The more immediate concern to WISP's should be carriers like > Clearwire/Sprint gobbling up licensed spectrum for their backhauls > in my > opinion. It's a very real concern in markets where Clearwire has > deployed... and is only going to become more of a concern going > forward. > 60GHz and 80GHz are going to get a big boost though. > > Daniel White > 3-dB Networks > http://www.3dbnetworks.com > [email protected] > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > On > Behalf Of Robert West > Sent: Wednesday, December 23, 2009 3:57 PM > To: 'WISPA General List' > Subject: Re: [WISPA] Wireless backhauls for Cell Carriers > > Some of us have discussed doing that but it takes more than just a > few of > us. If enough were on board it would be a win/win for those involved. > > Bob- > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > On > Behalf Of Don Renner > Sent: Wednesday, December 23, 2009 5:37 PM > To: 'WISPA General List' > Subject: [WISPA] Wireless backhauls for Cell Carriers > > A coordinated effort by WISPA to provide some of the necessary > backhauls, > seems like a good idea. > > > > http://www.rcrwireless.com/apps/pbcs.dll/article?AID=/20091223/INFRASTRUCTUR > E/912219995/ > > > > Don Renner > > NetsurfUSA, Inc. > > 8550 W. Main St. > > French Lick, IN 47432 > > 812-936-4514 Office > > 812-936-2006 Fax > > 812-521-1876 Cell > > [email protected] <mailto:[email protected]> > > > > > > ---------------------------------------------------------------------------- > ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- > ---- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > ---------------------------------------------------------------------------- > ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- > ---- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > ---------------------------------------------------------------------------- ---- > WISPA Wants You! 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