Heterogeneous Network (Hetnet)

Submitted by,Rahul Kanekar (15021)

INDRODUCTION• Watching streaming videos, uploading pictures and using cloud-based

services will make high demands on mobile networks.

• At the same time more devices will be connected.

• Heterogeneous Networks will play an important role to create an optimal customer experience, especially in crowded areas.

Heterogeneous Network involves a mix of radio technologies and cell types working together seamlessly.

Roadmap for increment in devices

In 2017 there will be morethan 8 billion

mobile subscriptionsin the world.

Ericsson envisions that therewill be 50

billion connecteddevices by

2020.

Overall mobile data

traffic isexpected to

grow 10-fold byend of 2016.

Mobile Broadband

subscriptionsexpected to reach close

to 5 billion by end of 2016.

2016 2020

3 stepsTO A HIGH-QUALITYMOBILE USER EXPERIENCE

• A Heterogeneous Network (Hetnet) based on a single vendor 3GPP-standardized and coordinated radio network with integrated Wi-Fi, advanced traffic management and high-performance backhaul, will help to deliver a consistent, high-quality and seamless mobile broadband experience.

Step 1

• Improve existing macro cells – by enhancing macro cells with more spectrum, advanced antennae, increased order of diversity on the receiver and/or the transmitter, and baseband processing capacity within and between nodes. • Continued evolution of HSPA and LTE technology will drive macro

network efficiency through specialized features, such as higher-order modulation, higher sectorization, and multi-carrier and multi-antenna solutions, as well as spectrum refarming, using hybrid radio solutions. • Increasing capacity and data rates in this way does not require new

sites.

Step 2

• Densify the macro network – the capacity and data rates achieved by enhancing the macro network alone, will eventually be insufficient to meet demand. • The targeted addition of cells strategically located can improve capacity. • This approach keeps the total number of sites relatively low, while

network performance becomes less sensitive to traffic location.• A simple way to densify a network could be a cell-split, which enables

a site from transitioning to a six-sector site from a three sector site. • These strategic cells could use macro equipment, or even micro

equipment.

Step 3

• Add small cells – by complementing macro cells with small cells and dedicated indoor solutions, based on the 3GPP standard. • This approach can include the use of micro cells, pico cells or low-

power remote radio units (RRUs), as well as Wi-Fi. • It delivers high per-user capacity and rate coverage in areas covered

by the small cells, with the potential to improve performance in the macro network by offloading traffic generated in hotspots. • The degree of integration that can be achieved throughout the

Heterogeneous Network will determine the overall network performance.

Cell coordinationTO A HIGH-QUALITY MOBILEUSER EXPERIENCE

In a Heterogeneous Network (Hetnet), the coordination between macro cells and small cells has a positive impact on the performance of the radio network, and consequently on the overall user experience.

Macro for downlink, micro for uplink

• In the imbalance area, the downlink signal from the macro is the strongest, because it transmits at a much higher power, whereas the uplink signal from the pico node is much stronger, because it is closer. • This provides the user with significantly higher uplink speeds than

would be possible with macro coverage alone.

Thank You