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making-the-best-use-of-unlicensed-spectrum-presentation

Best use of unlicensed spectrum

Durga Malladi

VP, Engineering

Qualcomm Technologies, Inc.

February 3, 2016

Agenda

?Overview

Making the best use of licensed and unlicensed spectrum

More licensed spectrum is the top priority

Use unlicensed spectrum opportunistically

Technologies for hyper-densification

More small cells

Higher efficiency For both licensed & unlicensed spectrum

More spectrum

Multiple technologies will co-exist for different needs

Wi-Fi (11ac/11ad/11ax/11ay)

Evolving for enhanced performance and expanding to new usage models

Licensed Spectrum

Exclusive use

Unlicensed Spectrum

Shared use

Aggregation with licensed anchor

channel

MulteFire

Broadens LTE ecosystem to enhanced and new deployment opportunities

LWA (LTE Wi-Fi Link Aggregation)

Targeting mobile operators leveraging existing carrier Wi-Fi deployments

LTE-U / LAA (Licensed-Assisted Access)

Targeting mobile operators using LTE in unlicensed spectrum for new small cell deployments

anchor

LTE-U/LAA, LWA, MulteFire and 802.11 ac/ax will coexist in 5 GHz

Making best use of 5 GHz unlicensed band

Enterprises

Small Businesses

Residential/Neighborhood

Venues

Large amounts of spectrum available globally (~500 MHz 1)

Ideal for small cells thanks

to lower mandated transmit power Global neutral spectrum that can serve any user with same deployment –neutral hosts

Wi-Fi in Unlicensed 2.4 & 5 GHz

LWA (LTE Wi-Fi Link Aggregation)

LAA / LTE-U (Licensed-Assisted Access)

Aggregation with licensed anchor for best performance

LTE in Licensed 400MHz to 3.8GHz

?Fatter pipe with higher data speeds ?

Seamless & robust user experience ?

Unified network

LTE in Unlicensed 5 GHz

Licensed Anchor

Carrier

aggregation

Link

aggregation

3GPP for LAA

A global standardization organization for cellular network technologies such as LTE, including LWA and LAA(rel. 13) used for aggregation of unlicensed and licensed spectrum.MulteFire Alliance

An international association formed in 2015 that will develop global technical specifications and product certification for MulteFire based on 3GPP standards.

LTE Unlicensed developed through industry collaboration Collaboration with organizations such as Wi-Fi Alliance and IEEE

LTE-U Forum

An industry forum defining

coexistence specs LTE-U based

on 3GPP rel. 12, for early time to

market for certain markets(e.g.,

USA, Korea, India).

LTE-U Forum

LAA dual connectivity

Call

Continuity LTE/Wi-Fi Link Aggregation

Multiple technologies for multiple deployment scenarios

MulteFire

Wi-Fi

802.11ac + 802.11ad LTE-U/LAA carrier aggregation

Service

continuity

LTE/Wi-Fi Technology Solutions

LTE in Licensed Spectrum

LTE in Unlicensed Spectrum

Wi-Fi in Unlicensed Spectrum

Seamless

handover

Agenda

?LAA / LTE-U

Extending LTE to unlicensed spectrum

LTE-U and Licensed Assisted Access (LAA)

1 2

?Path to Gbps speeds

By aggregating licensed and unlicensed

?Seamless and robust user experience

With reliable licensed spectrum anchor

?2x capacity and range

Over Wi-Fi capacity in dense deployments 2

?Single unified LTE network

Common management

?Fair Wi-Fi coexistence

Fundamental design principle

Supplemental Downlink (SDL) to boost downlink

Unlicensed (5 GHz)

Licensed Anchor (400 MHz –3.8 GHz)

LTE

Carrier

aggregation

LTE-U and LAA part of the same evolution

Enhancements to LAA

eLAA and beyond

Includes LBT required for global deployments

LAA

Time to market for certain regions: USA, Korea, India

LTE-U

Based on 3GPP R12

3GPP R13

3GPP R14 and beyond 1

?Supplemental downlink (SDL) to boost downlink

Dynamic channel selection to avoid Wi-Fi and adaptive duty cycle (CSAT) to fairly coexist ?

Support for migration to LAA

?Supplemental downlink (SDL)?Dynamic channel selection ?

Listen before talk (LBT) complying with global regulations

Adds uplink aggregation: Boost uplink data rates and capacity 2?Dual Connectivity: Aggregation across non-collocated nodes ?

Complexity reduction 3

LAA and LTE-U are designed with fair coexistence as a key principle

Fair Wi-Fi coexistence a key principle in LTE unlicensed design

Extensive over-the-air testing performed in the lab and in the field

Operator

A Wi-Fi

Operator

A Wi-Fi

≥1x

>2x Gain 1

(Median throughput)

Operator

B Wi-Fi

In many cases a better neighbor to

Wi-Fi than Wi-Fi itself

Operator B switches Wi-Fi to

LTE

in unlicensed

Operator

B LTE in unlicensed

LAA is designed to protect Wi-Fi

Select clear channel: Dynamically avoid Wi-Fi

Up to 500 MHz available

MHz

Release unlicensed channel at low traffic

20MHz

Wi-Fi

If no clear channel then share fairly: “Listen before talk” (LBT)

LAA Busy

Wait

LBT ensures fair sharing in unlicensed 5 GHz

LBT is standardized in ETSI EN 301 893

LAA

Wi-Fi

<10ms on-time

Same rule for everyone 1, including Wi-Fi and LTE

Meets global regulations ED –Energy Detect Threshold

Introducing 1a more sensitive threshold that is

common for all technologies when sensing each other.

CCA –Clear channel assessment

If no signal is sensed based on ED threshold, then go ahead with transmission right away.

eCCA –Extended CCA

If channel is busy (CCA), then wait for it to become clear. Once it is clear, wait for a random number of additional CCAs indicating that the channel has remained clear before starting transmission.

Busy Wait

Ready to transmit, but channel is busy

Channel is clear, start random wait period

Done waiting, starting transmission

Channel clear, start to transmit

CCA

eCAA

Designed for fair sharing of 5 GHz

TX TX

LAA part of LTE Advanced Pro — a rich roadmap of features

Pushing LTE capabilities towards 5G

LTE Advanced Pro

LTE Advanced 2015

2020+

Rel-10/11/12

Carrier aggregation

Low Latency Dual connectivity

SON+

Massive/FD-MIMO CoMP Device-to-device Unlicensed spectrum Enhanced CA

Shared Broadcast Internet of Things 256QAM

V2X FeICIC

Advanced MIMO

FDD-TDD CA eLAA

LAA

Agenda

?Wi-Fi & LWA

Strong Wi-Fi evolution

802.11ax

Uplink MU-MIMO, expanding outdoors

802.11 ah

Sub GHz, extended range, long battery life

802.11ay

100 Gbps

Carrier Wi-Fi Enhancements

Optimized Connectivity Experience (OCE) and Multi-Band Operation (MBO)

2015

2014

2016

2017+

Wi-Fi Aware

Enhanced discovery for proximal awareness

Wi-Fi Direct

Device-to-device communications

Providing the connectivity fabric for everything

Continuing to solve the 1000x challenge

Passpoint Rel 3.0

802.11ac MU-MIMO

Multiplying efficiency

802.11 ad

60 GHz, multi-gigabit, high density connections

802.11ac

Breaking the Gbps barrier

Passpoint Rel 2.0

Multi-user efficiency Higher spectral efficiency —especially in multi-user scenarios

OFDMA, uplink MU-MIMO, Outdoor deployments

Improved outdoor performance

Longer cyclic prefix and longer

OFDM symbol duration

Backward compatible

Supports both 2.4 GHz and 5 GHz

Backward compatible

with legacy 802.11 (n/ac)

802.11ax: Enabling carrier-class deployments

LWA for existing and new carrier Wi-Fi

LTE –Wi-Fi link aggregation part of 3GPP Release 13

Leverages new/existing carrier Wi-Fi (2.4 & 5 GHz unlicensed spectrum)

LTE Anchor (Licensed spectrum)

?Seamless & robust user experience

Licensed anchor for control and mobility

?Unified network

Operator LTE network in full control of Wi-Fi

?Better performance

Simultaneously using both LTE and Wi-Fi links

Control

Traffic

Modem-level aggregation for superior performance

Wi-Fi

Possible across non-collocated nodes

Link

aggregation