AT&T Purchases FLO Spectrum from Qualcomm
Top message: Tmobile should have been all over this by ygbhen
Replying to: Re: Tmobile should have been all over this by ygbhen
Re: Tmobile should have been all over this
Tmobile should have been all over this one. This would have gave them spectrum to cover all the major metro areas and then some.
No. Unless T-Mobile were to deploy TDD LTE (while nearly all other carriers deploy FDD LTE), the Lower 700 MHz D & E licenses that AT&T is acquiring from Qualcomm would be worthless to T-Mobile. To understand, view the Lower 700 MHz band plan:
http://wireless.fcc.gov/auctions/data/bandplans/700l ... »
The Lower 700 MHz D & E blocks are unpaired. Compare them to the Lower 700 MHz A, B, and C blocks -- note how those blocks consist of paired spectrum.
In paired spectrum, the uplink (mobile -> base station) operates in the lower frequency half of the block, the downlink (base station -> mobile) in the higher frequency half. This is called Frequency Division Duplex (FDD), since the uplink & downlink are divided by frequency. Nearly all currently deployed cellular technologies -- CDMA, GSM, EV-DO, W-CDMA -- operate in FDD configuration, as opposed to Time Division Duplex (TDD), in which the uplink & downlink share the same spectrum but are divided into time slots.
Background info aside, AT&T has numerous Lower 700 MHz B & C licenses that it acquired via purchase of other license holders or at FCC auction several years ago. AT&T will use these licenses to deploy FDD LTE. Additionally, FDD LTE allows for downlink aggregation. In other words, one uplink can be paired w/ two downlinks. So, AT&T will use the Lower 700 MHz D & E blocks that it is acquiring from Qualcomm as supplemental downlinks.
T-Mobile, on the other hand, has no paired Lower 700 MHz spectrum. So, the unpaired Lower 700 MHz spectrum from Qualcomm would be of no use to T-Mobile for FDD LTE.
Does that make sense?
- Re: Tmobile should have been all over this by Azeron