Verizon Wireless Targets LTE Build Out for 2009
Top message: Will not happed by 2009. by stevelvl
Replying to: Re: Will not happed by 2009. by stevelvl
Re: Will not happed by 2009.
The Tcarriers will only operate at the capacity dictated by the cell site. However, once the backhaul for a site gets above 80%, extra capacity via additional spans is usually in the works for the site.
As far as the "average" 3g site, I don't know ANY site with just 2 spans. To simply meet the OTA peak bandwith of EVDO Rev A, you need 2+ spans. That's per sector, and most sites have 3 sectors. So that's 6 spans for just peak bandwith on 1 carrier of EVDO Rev A. Account for multiple EVDO carrier sites, in addition to having multiple 1x voice carriers requiring additional spans (anywhere from 1 for small sites to 8 or more for busy city site). That's why I chose 4 or 5 spans average.
I'll take your word on the needs for LTE. I think it would be interesting to know what Sprint/Clearwire is using for backhaul in Baltimore for their WiMax network, as that's probably a similar situation compared to what VZW will be using to deploy the initial LTE network.
Unless a site has microwave backhaul, 99% of the time it IS as easy as connecting to a provide on the nearest telephone pole. Comcast where I am uses fiber on the telephone poles to handle their network. Verizon Landline (now Fairport after the sale) also uses fiber on the poles to handle their network. However, neither is doing fiber to homes in my area. So the data gets switched from fiber to cable or phone (depending on the service) when it reaches each home via a fiber mux. The mux will take that fiber and break it out into the Tcarriers. With an upgrade at the switch and an upgrade to the mux, each Tcarrier could just as easily be a 10, 100, or 1000 Mbps "span" as opposed to a T1.
As far as the "average" 3g site, I don't know ANY site with just 2 spans. To simply meet the OTA peak bandwith of EVDO Rev A, you need 2+ spans. That's per sector, and most sites have 3 sectors. So that's 6 spans for just peak bandwith on 1 carrier of EVDO Rev A. Account for multiple EVDO carrier sites, in addition to having multiple 1x voice carriers requiring additional spans (anywhere from 1 for small sites to 8 or more for busy city site). That's why I chose 4 or 5 spans average.
I'll take your word on the needs for LTE. I think it would be interesting to know what Sprint/Clearwire is using for backhaul in Baltimore for their WiMax network, as that's probably a similar situation compared to what VZW will be using to deploy the initial LTE network.
Unless a site has microwave backhaul, 99% of the time it IS as easy as connecting to a provide on the nearest telephone pole. Comcast where I am uses fiber on the telephone poles to handle their network. Verizon Landline (now Fairport after the sale) also uses fiber on the poles to handle their network. However, neither is doing fiber to homes in my area. So the data gets switched from fiber to cable or phone (depending on the service) when it reaches each home via a fiber mux. The mux will take that fiber and break it out into the Tcarriers. With an upgrade at the switch and an upgrade to the mux, each Tcarrier could just as easily be a 10, 100, or 1000 Mbps "span" as opposed to a T1.
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