back to homepage

Archive for the ‘Spectrum’ Category

Dubious spectrum efficiency metric won’t die

In the FCC’s incentive spectrum auction proceeding, Information Age Economics (IAE) complains about the reliance of some in the industry (CTIA and Verizon, to name a couple) on a spectrum efficiency metric that simply divides an operator’s nationwide spectrum holdings by the number of subscribers. This results, in one example they give, of Sprint having 3.57 Hz per subscriber and Verizon having 1.05 Hz per subscriber. Some take this as Verizon using spectrum more efficiently, and perhaps being at a disadvantage. As IAE points out, however, spectrum is not partitioned to users this way: cellular infrastructure allows for frequency reuse. If one wants to compare the spectrum efficiency of Sprint and Verizon, don’t look at it nationwide — look at, say, Washington, D.C.

Read the rest of this entry »

Posted by Steven J. Crowley to Auctions, CTIA, Spectrum @ 11:25 am, 05/29/13 | No Comments

FCC’s 5 GHz spectrum initiative could mean more and wider channels for IEEE 802.11ac

FCC Chairman Julius Genachowski yesterday announced an initiative to make 195 MHz of more spectrum available for Wi-Fi in the 5 GHz band.

The last time more spectrum for Wi-Fi was made available in this range was in 2003, when an FCC increased the then 300 MHz bandwidth to 555 MHz. As the document in that last link shows, the 5 GHz band is not as neat as the 2.4 GHz band, with other services, such as radar, requiring protection. These coexistence issues will have to be looked at again.

Read the rest of this entry »

Posted by Steven J. Crowley to 5 GHz, Qualcomm, Spectrum, Uncategorized, Unlicensed, Wi-Fi @ 8:18 am, 01/10/13 | No Comments

Deloitte’s mobile-broadband spectrum policy primer

Deloitte recently issued a new report on mobile broadband. It positions the U.S. as number-one and offers tips to keep it there, some more useful than others. There’s not much new for the mobile broadband expert. The collection of various mobile-spectrum policy issues into one document, however, could be useful to some, especially to those new to the field. Early on, Deloitte promises suggestions for improving U.S. spectrum policy;  the suggestions, however, turn out to be mostly things we’ve heard before. There are a few problems with the report, discussed below, that readers should keep in mind.

Read the rest of this entry »

Posted by Steven J. Crowley to Mobile Broadband, Policy, Small Cells, Spectrum, Wi-Fi @ 6:00 am, 10/15/12 | No Comments

4G Americas Scenario Shows Mobile Data Growth Tapering Off

4G Americas, a wireless industry trade association representing the 3GPP family of technologies, has released a report looking at broadband devices and applications, and their impact on HSPA and LTE networks. There’s quite a bit of interesting information; here I highlight the discussion on mobile broadband offload and mobile data growth.

Read the rest of this entry »

Posted by Steven J. Crowley to 3G, 3GPP, 4G, Femtocells, HSPA, LTE, Mobile Broadband, Mobile Services, Small Cells, Spectrum, Wi-Fi @ 11:00 pm, 05/16/12 | No Comments

Experimental Radio Applications at the FCC

This summarizes a selection from 215 applications for the Experimental Radio Service received by the FCC during October, November, and December 2011. These are related to AM broadcasting, FM broadcasting, spread spectrum on HF and VHF, unmanned aerial vehicle control, electronic warfare support, small satellites, white space technology, video production, managed access, TV interference, RFID, and radar.  The descriptions are listed in order of the lowest frequency found in the application.

Read the rest of this entry »

Three Invalid Assumptions that Make the FCC’s Spectrum Requirements Model Skew High

“To generalize, it is often true that studies will be promoted that tend to support the policy inclinations of the Chairman, under whose direction, after all, every draft decision is made.”

“[S]tatistics can lie. But cast as ‘studies’ by commentors, they take on the weight that a decision maker chooses to make of them.”

Daniel Brenner

As a follow-on to its National Broadband Plan, the FCC last year released a Technical Paper intended to validate the Plan’s prediction of a 300 MHz mobile-broadband spectrum deficit by 2014. The Paper describes a spectrum requirements model that totals current spectrum assigned to mobile broadband and applies a multiplier based on expected demand, taking into account expected increased tower density and improvements in air-interface spectrum efficiency. The model’s result is a predicted deficit of 275 MHz in 2014, which rounds to 300 MHz. On the way toward that result, however, the analysis uses just a few of the available data forecasts, ignores offloading of macrocell data to Wi-Fi and femtocells, and assumes the continuation of flat-rate plans for consumers. Some of these oddities I noted in a post at the time. I had hoped the FCC would make the Paper a subject of public comment. That hasn’t happened. So, I’ve looked at the Paper in more detail. I find that when looking at the above factors in a more realistic manner, predicted spectrum requirements go down significantly.

Read the rest of this entry »

Posted by Steven J. Crowley to 3G, 4G, DTV, FCC, Femtocells, Mobile Broadband, National Broadband Plan, Small Cells, Spectrum @ 12:56 pm, 11/19/11 | 4 Comments

Experimental Radio Applications at the FCC

This summarizes a selection from 173 applications for the Experimental Radio Service received by the FCC during August and September 2011. These are related to long-range low-frequency radar, amateur radio, shortwave data, wireless microphones, single-sideband, mine detection, millimeter-wave communications, signal intelligence, automotive radar, satellite feeder links, meteor-burst communications, aircraft telemetry, white space systems, border security radar, 3G and 4G applications, RFID, wind turbine testing, unmanned aerial vehicles, spacecraft telemetry and control, aircraft passenger broadband, and autonomous aircraft landing systems. The descriptions are sorted by the lowest frequency found in the application.

Read the rest of this entry »

Filling the Spectrum Pipeline

In my last post I looked at how the U.S. is behind some other countries in having new mobile broadband spectrum in the pipeline, according to a tally prepared by CTIA. What’s the status of candidate new bands?

Read the rest of this entry »

Posted by Steven J. Crowley to 4G, Cognitive Radio, DTV, Dynamic Spectrum Access, Land Mobile, Spectrum, TV Broadcasting @ 9:16 am, 09/08/11 | No Comments

CTIA’s International Case for More Spectrum

In a recent blog post, CTIA compares some measures of the U.S. wireless industry to those in nine other countries. The purpose is two-fold; to show the U.S. is a leader in number of subscribers, lowest cost per voice minute, and spectrum efficiency, and to argue the need for getting more mobile broadband spectrum in the “pipeline.” These goals are somewhat at odds, and the spectrum-efficiency argument I don’t get, as I’ll explain, but within the constraints of a blog post I think CTIA makes the case that the U.S. is a clear leader in some areas, and that the prospects for more mobile spectrum in the U.S. are fuzzier than they should be today.

Read the rest of this entry »

Posted by Steven J. Crowley to 4G, IMT-Advanced, LTE, LTE-Advanced, Mobile Broadband, Policy, Spectrum @ 10:04 pm, 08/30/11 | 1 Comment

Spectrum, Data, Capacity, and PR

A couple of days ago the Mobile Future coalition posted a short video on YouTube advocating the allocation of more spectrum for mobile broadband.  As evidence of the need, it says that, compared to feature phones, smartphones use 24 times the spectrum and tablets 120 times the spectrum.

Read the rest of this entry »

Reports from NAB and CTIA Address Efficient Use of Spectrum

Recent contributions to the mobile broadband spectrum debate are reports from NAB and CTIA. I envisioned a “dueling reports” piece, but they mostly complement each other. Below I walk through the main points, adding some of my own views.

Read the rest of this entry »

Experimental Radio Applications at the FCC

This summarizes a selection of applications for the Experimental Radio Service received by the FCC during March 2011. These are related to VHF propagation, satellite communications, TV white space, military communications, radar, software defined radio, aircraft broadband services, adaptive networks, peer-to-peer networks, intermodulation testing, unmanned aircraft systems, maritime broadband communications, border surveillance, target acquisition, and millimeter wave propagation.  The applications are sorted by frequency.

Read the rest of this entry »

Should a Sales Brochure Underlie US Spectrum Policy?

The FCC relies on Cisco’s forecast of mobile-broadband data demand as a basis for spectrum policy. Called the Visual Networking Index, it comes up many times in the National Broadband Plan, in other documents, and in speeches.

Read the rest of this entry »

Posted by Steven J. Crowley to 4G, IMT-Advanced, LTE, LTE-Advanced, Mobile Broadband, National Broadband Plan, Spectrum @ 9:22 am, 03/29/11 | 2 Comments

Stanford-developed Transceiver Operates Full Duplex on a Single Channel

To avoid interference, wireless transceivers can switch between transmit and receive on one frequency (Time Division Duplex (TDD)). Or, they can transmit and receive at the same time on different frequencies (Frequency Division Duplex (FDD)). There’s been a flurry of press reports about a new radio system, developed by Stanford researchers, that can operate full duplex on a single channel; that is, transmitting and receiving at the same time on the same frequency, something not done before.

Read the rest of this entry »

Experimental Radio Applications at the FCC

This summarizes a selection of applications for the Experimental Radio Service received by the FCC during January 2011. These are related to land mobile radio, VHF propagation study, satellite communications, network-centric warfare, TV white space, software defined radio (SDR), military command and control, remotely piloted aircraft, LTE, radio direction finding, OpenBTS, Identification Friend or Foe (IFF), peer-to-peer communications, flight test telemetry, automotive telemetry, WiMAX, surveillance radar, vehicle radar systems, and millimeter-wave communications.

Read the rest of this entry »

  • About Steve

    Steve is a consulting wireless engineer who provides support for projects worldwide involving technology and competitive analysis, standardization, regulation, business development, patent portfolio management, and corporate communication. Clients include vendors, service providers, asset managers, government agencies, and other professional service providers. Named by Forbes as a top 10 mobile influencer on the basis of reach, resonance, and relevance in the industry.
  • Contact

    • E-Mail

    • Telephone

      +1-202-670-5040

    • Address

      Steven J. Crowley, P.E.
      1629 K Street, N.W. Suite 300
      Washington, D.C. 20006

  • Connect

  • Recent Tweets

  • Categories