Heterogeneous Networks increasing cellular capacityAbd El-Fattah Hussein Mahran

AgendaHeterogeneous networksKey options to expand network

capacityDesign options for heterogeneous

networksConclusion

Heterogeneous networksAttractive means of expanding

mobile network capacity.Composed of multiple radio

access technologies, architectures, transmission solutions, and base stations of varying transmission power.

Heterogeneous networksEnhancing and densifying the

HSPA/LTE multi-standard macro-cellular networks◦Meeting increasing traffic demands.◦Fulfilling users’ high expectations for

mobile broadband services.Article analyzes expansion strategies,

covers important design choices.◦Focusing on transmission power

differences and explores how to coordinate low power nodes and macro base stations.

By 2014, the average subscriber will consume about 1GB of data

per month compared with today’s average figures that are around some hundred MB per month.

Key options to expand network capacityImproving the macro layerDensifying the macro layerComplementing the macro layer

with low power nodes.

Coexistence of macro and low power nodes

DL and UL monthly data volumes and data rates at 5th percentile (95 percent coverage) supported by the different expansion strategies

Coordination potential with two low power nodes in each macro cell cooperating with the macro base station, ISD 425m, 20MHz andwidth, 1×2 antennas

The way to meet future capacity demand is by combining all three approaches◦Improving the macro layer◦Densifying the macro layer◦Adding pico nodes

Design options for heterogeneous networksSeveral aspects govern effective design of

HetNets◦ Demand perspective

Traffic volumes Traffic location Target data rates

◦ Supply perspective Radio environment Macro-cellular coverage Site availability Backhaul transmission Spectrum and integration with existing macro network.

◦ Commercial aspects Technology competition Business models Marketing and pricing strategies

Design options for heterogeneous networks

ConclusionMobile-broadband traffic is increasing.

In parallel, new applications are raising expectations for higher data rates in UL and DL.

By combining low power nodes with an improved and densified macro layer, very high traffic volumes and data rates can be supported.

ConclusionThe nature of the existing network, as

well as technical and economic considerations, will dictate which approach improving the macro layer; densifying the macro layer; or adding pico nodes or combination of approaches best meets volume and data-rate targets.

Low power nodes give high data rates locally and also offer benefits to macro users by offloading and cooperating with the macro layer.

Referenceshttp://

www.ericsson.com/ourportfolio/telecom-operators/heterogeneous-networks?nav=marketcategory002

http://en.wikipedia.org/wiki/Heterogeneous_network

Questions