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5G networks and 3GPP Release 15

1

ITU PITA Workshop on

Mobile network planning and security

Sami TABBANE

23-25 October 2019 - Nadi, Fiji Islands

Agenda

I. 5G concepts and technologies

II. 3GPP Release 15

2

I. Concepts and TechnologiesAgenda

3

Future cellular systems technologiesHUDN

(Ultra Dense Networks)

HMassive MIMO

HmmWaveand/or TeraHertzcommunications

4

5G Mobile network architecture vision

Key architecture elements are:

H2 logical network layers:

oA radio network (RN) with a minimum set of L1/L2 functionalities oA network cloud with all higher layer functionalities HDynamic deployment and scaling of functions in the network cloud through SDN and NFV HSeparate provisioning of coverage and capacity in the RN by use of C/U-plane split architecture and different frequency bands for coverage and capacity HRelaying and nesting (connecting devices with limited resources non- transparently to the network through one or more devices that have more resources) to support multiple devices, group mobility, and nomadic hotspots HConnectionlessand contention-basedaccess with new waveforms for asynchronous access of massive numbers of MTC devices HData-drivennetwork intelligence to optimize network resource usage and planning 5

5G network cloud

6

5G Network ArchitectureH5G core network covers both wire-line and wireless accesses

HControl plane is separated from the data plane and implemented in a virtualized environment HFully distributed network architecture with single level of hierarchy HGW to GW interface to support seamless mobility between 5G-GW HTraffic of the same flow can be delivered over multiple RAT 7

5G challenges, potential enablers, and design principles

8

5G Network Technology FeaturesThe innovative features of 5G network can be summarized as diversified RAN

networking, flexible function deployment, and on-demand slicing. •Support diverse networking mode: C-

RAN, D-RAN, mesh,

D2D, BS plug-in

•To fit different 5G wireless scenarios EI Q BT /R82 7.9374 Tf

0 1 -1 -0 323.64 171.231 Tm

[(gNBeLTEDiversified RAN networking

Flexible function deployment

On-demand slicing

•Modularized Network function

•Network functions can be deployed flexibly based on NFVplatform•One Logical Architecture, maps to multiple Service Slices.

•Orchestrating network resource on-demand for each slice. •Isolated slices ensure efficiency, elasticity, security and robustness 9

Trends driving 5G transition

HLimitation in macrocells capacity:

HFlatter and more distributed networks,

HAdvanced source coding (H265),

HAdvanced RANs (HetNets),

HAdvanced RATs (newWWAN and WLANs

technologies),

HTransport technologies at the cell sites (fronthauland backhaul) significantly improved in terms ofspeed and deployment flexibility.

10 Trends driving 5G transitionHMobile performance metrics changes: 3G/4G network performance evaluated on "hard" metrics: peak data rates, coverage, spectral efficiency 5G performance metrics centered on user' QoE: ease of connectivity with nearby devices and improved energy efficiency, context-aware experience, personalized content, assistance services HUser Centric, No Cell(UCNC): novel radio access framework evolved from the classical cell-centric access protocol to a user-centric protocol with hyper-cell abstraction. HVariety of RATs and wireless devices: many devices with multiple RATs and modes from D2D based on LTE or WiFi Direct to short-range millimeter-wave (WiGig, new BAN oriented toward wearable devices).

HIoT with M2M.

11 Disruptive Technology Directions for 5G•Full duplex •NOMA multiplexing •QAM256 12 Disruptive Technology Directions for 5G•Flexible and powerful nodes at the edge:

HOffload the traffic from the core network,

HManage data flows efficiently by dynamically adjusting network resources to insure high QoE for each application flow. •Mobile Edge Computing:More content cached at the edge (reduces core network traffic at BH and reduces latency). •Optimized content delivery, Pre-caching of user generatedcontent and Internet contentbased on estimated popularity, social trends and used presence and preferences. Better utilize network pipelines based on context information. 13

Disruptive Technology Directions for 5G

Carrier aggregation

2015: 10 MHz at Band 5 (850 MHz), 20 MHz at Band 7 (2600 MHz) and 10

MHz at Band 1 (2100 MHz)

2016: commercially used in tens of mobile networks (South Korea, Japan, ...)

DL 3-CC CA deployed in some areas of South Korea.

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5G RAN technologies for capacity enhancements

Agenda

15 Physical Layer Features to Improve CapacityAdvanced physical layer techniques: HHigher-order modulation and coding schemes (MCS), such as

256-quadrature amplitude modulation (QAM),

HmMIMO(64x64 tested) to include AR, VR, ...

HAdd some intelligence at the transmitter and receiver to coordinate and cancel potential interference at the receiver, HIntroduce new schemes such as non-orthogonal multiple access (NOMA),

HFilter bank multicarrier (FBMC),

HSparse coded multiple access (SCMA),

HAdvanced power control,

HSuccessive interference cancelling (SIC).

SIC + NOMA can Improve overall throughput in macrocells compared to orthogonal multiple access schemes by up to 30 percent even for high-speed terminals. 16

Capacity Enhancements

17 Technology components for the evolution to 5G wireless access•Multi-antenna transmission •Ultra-lean design:minimize transmissions not directly related to the delivery of user data (i.e., synchronization, network acquisition and channel estimation, broadcast of different types of system and control information)0control signals deactivated if the cell is empty. 18 Technology components for the evolution to 5G wireless access•User/Control separation •Flexible spectrum usage: spectrum sharing between a limited set of operators, operation in unlicensed spectrum. •Flexible duplex•Direct D2D communication •Access/Backhaul integration: wireless-access link and wireless backhaul integrated (same technology) and operate using a common spectrum pool. 19

3 Dimensions for Capacity Enhancements

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Multiple Access Techniques

Agenda

21
Candidate multiple access techniquesHFiltered-OFDM(Filtered-Orthogonal Frequency Division Multiplexing), allows inter-subband non-orthogonality, HSCMA(Sparse Code Multiple Access), enables intra- subband non-orthogonality

HUFMC(Universal Filtered Multi Carrier)

HGFDM(Generalized Frequency Division Multiplexing). With: • Channel code Polar Code, • Full-duplex mode, • Massive MIMOtechnology. 22

Non Orthogonal Multiple Access

23

Non Orthogonal Multiple Access

U1 U2 -a+a -b+b

Transmission

Reception at the base station

+a +b+ a+b= +a -b+ a-b= -a +b+ -a+b= -a -b+ -a-b=P2=P1 P1 24

Non Orthogonal Multiple Access

U1 U2 -a+a -b+b

Transmission

Reception (U1 side)

+b +a+ a+b= +b -a+ b-a= -b +a+ -b+a= -b -a+ -a-b=P2>P1 P1 25

Non Orthogonal Multiple Access

U1 U2 -a+a -b+b

Transmission

Reception (U2 side)

+b+a+ a+b= -a+ b-a= -b+a=+ -a-b=P2>P1 P1

Initial transmission powerReceived power

+b +a -a -b -b 26

OFDM drawbacks

HOFDMdraw too much power in 5G devices and BSs.

HA 5G BS is expected to consume 3 times as much power as a 4G BS. HAny receiver needs to be able to take a lot of energy at once, and any transmitter needs to be able to put out a lot of energy at once.This cause OFDM's high PAPR and make the method less energy efficient than other encoding schemes. HIf operators want to update their equipment to provide NOMA,this will require additional costs especially for the BSs. HBSs would need SWupdates to handle NOMA and may require more advanced receivers, more processing power or other HWupgrades. 27

3D beamforming and cell

concept change 28

Beamforming and Array Antennas

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3D Beamforming

30

Moving cell concept

31

UP and CP separation

32

Control-data separation architecture (CDSA)• Has a built-in feature to support the network-driven sleep mode

methods with a lower delay, lower on/off oscillations, a higher energy efficiency, and a higher QoS. 33

Cell concept changes

34

Cloud RAN

35

BS architecture evolution

Synchronisation

Control

Transport

Baseband

RF PA RF

Synchronisation

Control

Transport

Baseband

Synchronisation

Control

quotesdbs_dbs14.pdfusesText_20

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