LTE Advanced Key Messages
Qualcomm is a leader in 3G and 4G
Qualcomm is a leader in 3G and 4G and committed to the continued evolution of 3G as well as the
evolution of LTE, LTE Advanced (3GPP R10) and beyond.
LTE (R8) launched in 2010:
LTE boosts data capacity in high demand areas
o LTE complements 3G, whic h provides ubiquitous data coverage as well as voic e support.
o Multimode LTE/3G devices provide seamless handover with 3G from day one and ensure
global roaming in global 3G bands.
LTE leverages new, wider contiguous spectrum—10 MHz and beyond—and TDD spectrum
o LTE TDD is the global solution for unpaired spectrum. It is experiencing strong traction
India and China with commercial launches in 2011.
o LTE FDD is available in bandwidths below 10 MHz but o ffers limited performance
differentiation compared to evolved 3G.
Qualcomm provides the industry’ s first LTE/3G multimode chipsets
o Common FDD and TDD chips et platform
o Supports all major 3G flavors and their latest evolutions
LTE Advanced realizes full benefits of Heterogeneous Networks
The next significant performanc e leap will come from bringing the net work closer to the user by adding
small cells—such as picocells.
A net work with a mix of macro cells and small cells is also referred to as a heterogeneous
net work or simply HetNet.
Simply adding small cells increases capacity, but LTE Advanced realizes the full benefit of het erogeneous
networks by applying adaptive interference management to further increase performance. LTE:
Significantly increase s network capacity—through better utilization of small cells
o Results in better offload of the mac ro network
o Better utilization of small cells even if they cannot be placed at an optimal location
Ensure s user fairness both within and between nodes
o Adding new nodes creat es new cell edges and some users may get reduced
performance—advanced interference management ensure user fairness
Enhance s the user experience
o Especially by providing higher cell edge and median user data rates
To achieve these benefits, the LTE network requires only software upgrades to support advanced
interference management—in connection with new advanced receiver devic es
The main benefit of advanced interference management is range expansion which effectively increases
the utilization of the small cell to increase overall network capacity (expanding the range of the small cell)
Note: Adaptive interference management techniques includes interference cancellation based advanced receiver devices (cancels
overhead channels), enhanced time-domain adaptive resource partitioning w ith enhanced RRM, and RLM. These three features
together enable range expansion of small cells that effectively increases the utilization of the small cell to provide higher overall
LTE Advanced brings different dimensions of improvements—the
most gain from HetNets
The radio link is improvement is slowing down: So how do we get more capacity? You can add more
spectrum, but spectrum is a limited resource, so we need focus on improving performance within the
So how do we get more capacity? You can add more spectrum, but spectrum is a limited resource. So
the solution is in foc using on improving performance within the available spectrum. Consider that:
o Aggregation of available spectrum primarily increases (peak and user) data rates.
o Leveraging more antennas and more radio links (such as higher order MIMO) increases
capacity (spectral efficiency)—but there are typically practical limitations on using more
o Bringing the network closer to the user—adding small cells in available spectrum —can bring
the next leap in performance. A new dimension of improvement: spectral efficiency per
LTE Advanced leverages all spectrum resources
LTE Advanced can aggregat e up to five carriers to further enhanc e the broadband experience.
Wider bandwidth is important to all wireless operators to enhanc e the user experience and create
a fatter data pipe—peak and us er data rates scale with the bandwidth all the way to the cell edge.
Carrier Aggregation (Multicarrier) is also a key feature for EV-DO Rev. B and HSPA+ to enhance
performance in the 5-20 MHz spectrum bands.
LTE Advanced carrier aggregation enables an operator to leverage all its spectrum assets:
Aggregation of spectrum within a spectrum band to create a fatter data pipe; for example,
aggregating t wo separat e 10 MHz FDD chunks within the 2. 6 GHz band
Aggregation of across spectrum bands to create a fatter data pipe; for example, aggregating a
high band (like 2.6 GHz) and a low band (like 700 MHz in the US and Digital Dividend in Europe)
Aggregation of more downlink capacity—supplemental downlink for unpaired spectrum
aggregated with paired spectrum (FDD)
o An example of an unpaired spectrum opportunity is in the 700M Hz band in the US, in
addition to paired (FDD) spectrum available in this band
o There is also up to 40 MHz of spectrum available in the L-Band with harmonization
possible in Europe and beyond
Qualcomm: LTE Advanced leadership
Qualcomm’s over-the-air prototype test bed in San Diego evaluates features to realize full benefits of
heterogeneous networks and to speed up the design of LTE Advanced.
Qualcomm continues its LTE standardization leaders hip.
A main contributor to key LTE Advanced features such as carrier aggregation, self-organizing
networks, relays, and waveform enhancements.
Major contributor for ITU IMT-Advanc ed submissions and the first company to show results
satisfying IMT-Advanced requirements for realistic assumptions. LTE Advanced is now approved
as an IMT-Advanced technology (Nov. 2010).