Tuesday, 26 February 2013

Is Wi-Fi the third RAN?

Most Metrocells trials that happened in the UK in 2012 and a few planned this year used Wi-Fi as the access technology. In the 3G4G blog I posted real life pictures from the Telefonica deployment. These small cells were using Wi-Fi as the access technology. The service providers are using WiFi for 'lamp/land grab' with the expectation that some of the sites would be replaced by LTE/HSPA Metrocells.

Saturday, 23 February 2013

What does the industry need from Metrocell Backhaul solutions?

An article by Justin Paul:
The original small cells, femtocells for residential and enterprise customers, used standard broadband internet for their backhaul connections into the mobile network core. Metrocells, deployed by operators for widespread public use in streets and densely populated urban areas, typically don't have this option. This has led to a range of innovative new wireless products both from established and upcoming vendors.

The Industry has already made its views known

In June 2012 the Next Generation Mobile Network Alliance (NGNM), an organisation of leading mobile communications companies, published a white paper outlining the requirements for small cell backhaul. The paper, written jointly by contributors from EE, Alcatel-Lucent, Huawei and others, provides an excellent overview of the topic.

"The raison d'etre of backhaul is to provide connectivity between the small cells and core nodes with the desired QoS level".

Using existing macrocell sites to consolidate backhaul for small cells

Most operators have pre-existing backhaul solutions that serve their macro cellular sites, even if in some cases that backhaul capacity is no longer adequate for the huge quantities of data required by smartphone users. These operators need to factor in the needs of their new small cells with the capabilities of their existing macro cells to ensure simple and cost-effective backhaul solutions.

In Dec 2012 EE revealed that they were in the process of upgrading every aggregation hub in their new LTE network from 1Gigabit/s to 10Gigabit/s as standard to cope with expected capacity demands.
There are also likely to be a few new "Small Cell Greenfield Operators" who will look to roll-out networks and provide backhaul with no existing legacy network, which presents a whole new set of challenges. These operators will start with a clean sheet and be able to use the most cost-effective solutions, but will suffer from the lack of a macrocellular base sites where backhaul can be aggregated.

Complete article: What does the industry need from Metrocell Backhaul solutions? | Metrocells | Small Cells:

We recently also held a Metrocells Masterclass at the IET in London where Justin Paul took us through the complete backhaul needs and options. The picture above is from his slide deck. The next one workshop is on the 21st of March in Cambridge. More details at:  

Saturday, 16 February 2013

What is a Metrocell? - definition by Alcatel-Lucent

Looking through an old ALU whitepaper, I found another way of describing Metrocell, so here it is:

Metro cells, the latest evolution in small cells, are based on the same low cost femtocell technology that has been successfully used in home and enterprise cells, but with enhanced capacity and coverage. With higher processing and transmit power, the first generation of metro cells is engineered to serve from 16 to 32 users and provide a coverage range from less than 100 meters in dense urban locations to several hundred meters in rural environments. However, unlike home and enterprise cells, metro cells are owned and managed by a MSP and typically used in public or open access areas to augment the capacity or coverage of a larger macro network.

Thursday, 14 February 2013

Infonetics: In-building, outdoor small cells to handle quarter of mobile traffic by 2016 - FierceMobileIT

By 2016, telecom operators expect in-building and outdoor small cells, such as microcells, picocells, and public access femtocells, to handle around one-quarter of mobile traffic, according to the latest research from Infonetics Research. 
A full 86 percent of the operators surveyed by Infonetics plan to backhaul small cell traffic to nearby macrocell sites using a variety of locations, including buildings, streetlights, and traffic and utility poles 
Operators will deploy various forms of microwave technology, such as non-line-of-sight, standard microwave and millimeter wave, although fiber is their preferred backhaul technology.

More info here: Infonetics: In-building, outdoor small cells to handle quarter of mobile traffic by 2016 - FierceMobileIT:

Friday, 8 February 2013

Small Cells on the Lamp posts and other street furniture

A lot of discussions, especially in the UK are focussed on lamp posts and other street furniture that will be used to host the outdoor Small cells or Metrocells. Some new players / operators are using the opportunity for land grab as its being called.

In a recent discussion Andy Sutton, Principal Network Architect, Network Strategy, Architecture & Design, EE discussed some of the problems that are faced with the so called lamp posts deployment. An example given was that of Birmingham in UK. See below:

Wednesday, 6 February 2013

Metrocell Q&A: Dedicated or Shared carrier?

From Alcatel-Lucent techzine:


While both dedicated and shared carrier solutions can be built, a selective dedicated carrier is always preferred over shared carrier for metro cell deployments, especially in outdoor environments where macro cell signal levels will be higher (Figure 6):
  • With dedicated carrier, the MNO reserves a carrier for the exclusive use of metro cells in geographies that have been specifically targeted as needing extra capacity. In all other areas this same carrier may be used by macro cells. The use of a dedicated carrier avoids interference with the macro cell, which enables metro cells to cover wider areas and to absorb a larger amount of traffic off the macro network – greatly improving the TCO.

Monday, 4 February 2013

MSM: Multi Standard Metrocell

Interesting way of AT&T keeping the small cells differentiation simple. We generally classify them in some more types as can be seen from the Metrocells taster presentation below:

I encourage everyone working in this field to attend our workshop if possible to discuss these and much more. Link