News of LTE-Advanced is making headlines. SK Telecom aggregated two 10 MHz carriers in 800 and 1800 MHz to achieve 150 Mbps downlink throughput with a version of the Samsung Galaxy S4 handset built upon Qualcomm’s Snapdragon 800 SoC. Verizon announced that its LTE network is nearly complete and suggested carrier aggregation (CA) is the… Read More: On LTE-Advanced and Carrier Aggregation »
In the late 1880’s, Heinrich Hertz’s experiments with wireless signals were in the VHF/UHF bands (60 to 500 MHz). The first transatlantic transmission in 1901 by Marconi was either around 850 kHz or in the neighborhood of 100 kHz: he simply did not have reliable equipment to measure the frequency. With these modest starts, advances… Read More: New Frontiers in Personal Communications (and Investment Opportunities!) »
The Small Cell World Summit just concluded, so I would like to summarize my thoughts and impressions from this event. For a little perspective, the conference is sponsored by the Small Cell Forum, which was called the Femto Forum before it rebranded in February 2012. In alignment with this new vision, the 2013 edition of… Read More: Small Cell World Summit 2013: Wireless Analytics to the Forefront »
This case study was designed to help answer important questions related to small cell deployments. It is based on a traffic forecast and capacity planning tool developed to aid operator strategic planning activities. The tool can also be used by vendors and other ecosystem players to map their product offering and plan for small cell… Read More: When Will Small Cells Be Deployed? A Case Study of… »
The Australian Communications and Media Authority (ACMA) announced last Tuesday the results of the 700 MHz & 2500 MHz spectrum auction. A total of AU$ 1.96 billion (US$ 2.02 billion) was raised by licensing a combined 200 MHz in these two bands. Telstra & Optus won 2×20 and 2×10 MHz, respectively, in the 700 MHz… Read More: Australian Digital Dividend Spectrum Auction Concludes by Raising $2 Billion. »
The deluge of demand for mobile data has been much discussed and talked about. News is abounding with figures, quotes and graphics of the increasing consumption (about doubling every year) and its projection to the future (anywhere from 10-25 time increase within the next 4 years). On the other hand, there has not been much… Read More: The Shifting Paradigm of Mobile Network Operations »
When it comes to deciding on deploying small cell base stations, one is faced with a few options. One option is based on cloud RAN architecture with remote radio heads connected through optical fiber to a central base station housing the baseband processing. A second option is that of a compact base station which includes… Read More: Cloud RAN vs. Picocells: The Need for Integrative Approach in… »
Small cells raise a number of practical implementation questions which are yet to be resolved. One such question is whether small cells should operate in the same frequency band as the macrocell layer (co-channel deployment), or on a different frequency band. The question has profound implications to operators, vendors, and to regulators alike. To clarify,… Read More: Should Small Cells Be Deployed In Their Own Spectrum Band? »
If you’re in the wireless infrastructure business, you’ve seen it many, many times. I’m talking about the predictions showing exponential mobile data traffic growth. Hardly a conference presentation goes by without seeing this graph on the first or second slide. It became customary to preface any discussion with this context, often with the idea to… Read More: Mobile Data Traffic Predictions Say: It’s WiFi Offload! »
In my earlier blog post, The Hype & Reality of Small Cells Performance, I provided a qualitative review of small cell performance and discussed interference scenarios that limit performance. Perhaps the most defining problem of small cell deployments is the large transmit power imbalance between the macrocell and the small cell (~20-30 dB) which increases… Read More: Unleashing the Power of HetNets: Interference Management Techniques for LTE-Advanced… »
MWC is over. In reflecting on the show, I came up with an idea and tried it out, just for fun. What if I take all the news coverage from the show and generate a ‘word cloud,’ would I be able to zoom in on the few key trends? What would ‘word clouding’ tell me?… Read More: Word Clouding MWC: Observations and Takeaways. »
The long-awaited 800 MHz and 2600 MHz UK auction concluded today with a total of £2.34 billion, or $3.63 billion (Ofcom set reserve price at £1.3 billion). The winners of 60 MHz of digital dividend spectrum in 800 MHz band include EE, 3G, O2 and Vodafone. In the 2.6 GHz band, Vodafone, EE and BT… Read More: UK 4G Spectrum Auction Concludes – A Brief Analysis »
Heterogeneous networks (HetNets) consist of large (macro) cells with high transmit power (typically 5 W – 40 W) and small cells with low transmit power (typically 100 mW – 2 W). The small cells are distributed beneath the large cells and can run on the same frequency as the large cell (co-channel), or on a… Read More: The Hype and Reality of Small Cells Performance »
Small cells are meant as a solution to address the explosive growth in mobile data services, right? Well, the answer is: it depends! They can be a solution under certain conditions, but not always. Yes, there could be situations where small cells add little if any gain. In fact, more than one operator mentioned to… Read More: More and More Small Cells, But Where’s the Gain? »
Momentum for spectrum sharing is gathering strength, particularly for the 3.5 GHz band which is slated for small cell deployments. The NTIA has done detailed studies and prioritized this band ahead of other candidates such as 1700 MHz and 4 GHz bands for fast track evaluation. The FCC followed by issuing a Notice of Proposed… Read More: Behind The Headlines: Will Small Cells Thrive Under Spectrum Sharing… »