Sectorising, or breaking up a large cell into smaller ones, has been a common practice among carriers for several years in areas where capacity demands outstrip network capabilities. This situation typically occurs in dense urban areas or large public venues (airports, stadiums, etc.) where an unusually high concentration of cell phone users demands network services at the same time.
With LTE, which is all about wireless data, the capacity crunch will extend to more areas than ever before. Along with stadiums and transit hubs, we will see capacity constraints in city centre’s, suburban shopping malls, office buildings, universities, hospitals, and many other locations. But by deploying a higher number of smaller cells, carriers can provide adequate capacity for everyone under LTE.
Cell + DAS = Happiness
The problem is that cells are expensive to deploy and each cell requires its own backhaul connection to the network. To overcome these issues, the best practice in deploying a small-cell infrastructure is to combine small cells with distributed antenna systems (DAS).
DAS extend the reach of cell base stations by delivering the base station signals through a series of small remote antennas. These antennas can be inside buildings, in parking lots, in underground subways or other structures, or they can be located in any outdoor areas where more coverage is required (such as urban canyons where the macro network signal is ‘shadowed’ by buildings). By extending the reach of the base station with DAS, capacity can be delivered precisely where it is needed.
Instead of requiring thousands of small base stations, DAS products simply extend a base station signal; they can carry whichever frequency the base station puts out. The more advanced active DAS products can deliver multiple frequencies and deliver the same high, uniform signal strength at every antenna, no matter how far it is away from the base station source.
Once deployed, DAS are virtually transparent to the network and are largely trouble-free. Their small antennas fit easily on the sides of buildings, in office ceilings, or even in street furniture, so they can be deployed in more places without objections from city planners. Since the DAS distribute the signal, base stations can be deployed at existing cell sites or in centralised ‘base station hotels’.
Sharing, caring and GSOH
Moreover, since DAS can distribute multiple frequencies, DAS infrastructure can be shared by more than one mobile operator. This way, operators can co-locate base stations in a central location and use a common DAS to distribute their signals to buildings or outdoor urban areas.
Using DAS to distribute signals in LTE networks will also end the traditional demarcation between in-building and outdoor networks. Extended DAS networks can serve both urban outdoor areas and inside buildings, allowing mobile operators to better integrate their various assets for unified management and control.
LTE will require a wholesale move toward small cell mobile infrastructure, and DAS will enable that infrastructure in a cost effective and highly efficient manner.
Tyco Electronics is a US$10.3 billion global provider of engineered electronic components for thousands of consumer and industrial products; network solutions and systems for telecommunications and energy markets; undersea telecommunication systems; and specialty products. http://www.tycoelectronics.com/
LTE services demand infrastructure changes
Most Popular Mobile Business Stories
- The MVNO Challenge
- Voda Flat Rate BB
- Best-selling ringtones in 2005
- Japan five years ahead in mobile services
- Trend Micro Mobile Security
- Moco has given every member of staff a new LG 8180 video pho...
- Virgin Mobile hits the high street
- Voda Drop Hugh Symons
- Euro iPhone Deals Signed
- Glasgow Man Jailed for Carousel Fraud
- Integrate lightning detection into phones
- People love Nokia
- Nokia N91
- Data Overload
- O2 XDA ORBIT
- Welcome Mobile Asia Congress
- CONVERGING ON THE CUSTOMER
- COMPETITION – Win DVD – DivX – CD – MP3