heterogeneous network (hetnet)
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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
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