5g concept

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CAPITALS

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5G Concept

MEF GEN14

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EAB-14:068423 | Commercial in confidence | © Ericsson AB 2014 | 2014-11-18 |

›What is 5G and what should it provide?

›5G spectrum?

›Role of LTE evolution in the 5G context?

›New radio access technologies?

›Transport impact?

Outline

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whAt is 5G?

A wide range of requirements

More than just bigger and better mobile broadband

A platform on which any future wireless application

can be implemented

Evolution of existing radio access

+

New radio-access technologies

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5G spectrum range

5G spectrum range

1 GHz 3 GHz 30 GHz 100 GHz 10 GHz

› From below 1 GHz up to 100 GHz

– Lower frequencies (< 6 GHz) will be the backbone, providing 5G services with wide-area coverage

– Higher frequencies (>10 GHz) for extreme traffic capacity and data rates in dense scenarios

› 2020: LTE deployed in most available lower-frequency spectrum

Allow for backwards-compatible introduction of 5G capabilities at lower frequencies

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› LTE evolution = backwards-compatible evolution

– Strive to meet 5G requirements

– Possible to retain legacy UEs on the same carrier quick introduction of 5G services

– LTE should evolve as far as possible, constrained by backwards

compatibility

› Further enhanced MBB & MTC

› Higher capacity, lower latency, higher reliability, lower energy

consumption, …

5G Radio Access

› New RAT = no backwards-compatibility constraints

– Further optimization without compatibility constraints

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spectrum for “New RAT(s)”

1 GHz 3 GHz 30 GHz 100 GHz 10 GHz

› Higher-frequency spectrum (> 10 GHz)

– May be different solutions for different spectrum, e.g. sub-30 GHz vs. “true” mmw

› New spectrum below 6 GHz if available

› Gradual migration into currently used spectrum

Gradual migration

of new technology into existing spectrum

Evolution

of LTE

New technology

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Overall 5G solution

Common “higher layers”

Tight interworking

“L1/L2”

5G structure

Gradual migration

into existing spectrum

Existing spectrum New spectrum

“New RAT” LTE evolution Backwards

compatible No compatibility

constraints

Different detailed solutions

depending on frequency

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› Dual connectivity between new RAT on higher frequencies

and wide-area-covering LTE on lower frequencies

– Will initially be a common scenario

– To simplify introduction of new RAT

Tight interworking

› D2D using new RAT controlled by overlaid wide-area LTE network

› User-plane aggregation of new RAT and LTE on lower frequencies

– Full bandwidth can be retained at least for new device

– For more easy/smooth migration of new RAT into existing spectrum

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5G Technology areas

Extension to higher frequencies

Complementing lower frequencies for extreme

capacity and data rates in dense areas

Multi-antenna technologies

For higher as well as lower frequencies

Beam-forming

for coverage

Multi-user MIMO

for capacity

Multi-site connectivity

Multi-site transmission/reception

Multi-layer connectivity

…

Ultra-lean design

Minimize transmissions not related to user data

Separate delivery of user data

and system information

Access/backhaul integration

Same technology for access and backhaul

Same spectrum for access and backhaul

Device-to-device communication

Network controlled D2D

Spectrum flexibility

Unlicensed

Shared licensed

Network sharing

Complementing

dedicated

licensed spectrum

Flexible duplex Spectrum sharing

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System Control Plane

› Separate user-plane data transmission from system functionality

– System information and control provided wide-area by overlaid layer

– Underlaid network nodes only active when user-data to convey

› Major part of system information provided on a per-need basis

– Minimize amount of broadcast system information

– Separate of user data from control and system information multi-layer connectivity

› Multiple RATs may share the same system control plane

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› Multi-layer connectivity

– Between overlaid low-frequency and underlaid

high-frequency layers

› Robustness

– Spotty coverage at higher frequency bands

› Multi-site transmission

– Reception of multiple beams

› Diversity and robustness

– Rapid changes in propagation conditions

connectivity to multiple sites beneficial

Multi-Site Connectivity

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Network-controlled

direct communication

Device-based

Relaying

Direct communication

Unicast

Unicast Broadcast / Groupcast

Network-controlled

direct communication

Device-to-device communication

› Tightly integrated device-to-device communication under network control

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Backhaul-Access Convergence

› Dense deployments – challenging backhaul

– Access moving up in frequency to get more spectrum and bandwidth

– Wireless backhaul moving down in frequency to handle nLOS

› Integration of “backhaul” and “access”

– Same spectrum and technology for the two

– Dynamic sharing of resources between the two

– Single management system

› A first step towards multi-hop communication

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Transport Data PLANE Key challenges

Capacity Number of transport

clients

Latency

• Site/cell densification will lead to a

larger number of transport clients

• Up to a factor 100 small cells per

macro in some areas

• Order of magnitude higher traffic

densities

• Several orders of magnitude in

some areas/locations

• Additional order of magnitude

required capacity for specific segments and deployment models (e.g. C-RAN)

• Support for low latency services

considered as one important aspect of 5G (e.g. critical MTC).

• Stringent latency requirements associated with supporting particular RAN deployment models

(CPRI fronthaul, CoMP, etc)

Affordable & Sustainable

Flexible

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› 5G: “Seamless wireless Internet” – “10 Gbps” throughput on air interface

› More bandwidth (100G -> 1T) needed on backhaul

› e2e transport + radio solutions

– “1 ms” latency on air interface

› Lower latency on backhaul and fronthaul

› More localised X2 routing over midhaul (including IPsec)

› 5G target architecture – Ultra dense, 10 m cell range

› Use any available transmission for backhaul, midhaul & fronthaul

› Cloud-based security infrastructure

› ”Intelligent” transport (e.g., SDN, SON)

– New Licensed/unlicenced spectrum

› Available for wireless backhaul

2020: small cells and 5G - impact on Transport, sync, security?

↑ transport Evolution: latency, BW, connections, options

LTE will become the dominant technology < 6 GHz

with backhaul, midhaul & fronthaul transport

RRU

Backhaul Basestation site

Network controller /

gateway site

SGW , MME

Midhaul

Fronthaul

Pico eNB

Macro eNB

Small cell site

Remote radio site

Backhaul