Co-existence of Satellite & 5G

Services

Dr P.K JainISRO Headquarters, Bangalore

Feb 06, 2018

India Habitat Centre, New Delhi

India EU Stakeholders’ Workshop on 5G Technology Landscape

Co-existence

ISRO Headquarters, Bangalore

Satellite & Terrestrial services to complement each

other to meet the country’s requirements

Spectrum sharing & co-existence is unavoidable

Studies, analysis, modelling and validation needed

for working out the coexistence

Co-existence is always difficult when a new

service with shared spectrum is introduced

ISRO Headquarters, Bangalore

Satellite Services & Users

ISRO Headquarters, Bangalore

Satellite -Terrestrial ecosystem

Frequency coordination for satellites services is much more

difficult

Frequency reuse is much more efficient for terrestrial services

Emerging services demand more capacity/spectrum from

satellites

Frequency Bands of Present Interest

WRC-15, ITU has proposed 11candidate bands for study forIMT-2020 mobile systems

Deployment based onCoexistence and Sharing studies

Freq. Band: IMT2020/5G

Frequency Band

BW (GHz)

24.25-27.5 3.25

37-40.5 3.5

42.5-43.5 1

45.5-47 1.5

Frequency Band

BW (GHz)

47.2-50.2 3

50.4-52.6 3.25

66-76 3.5

81-86 1

3.4-3.425 GHz: NavIC

3.6-3.7 GHz: MSS Feeder

23.6-24 GHz: EESS (Passive)

24.25-27.5 GHz: EESS, HSP & IDRSS

27.5-29.5 GHz: HTS

37.0-43.5 GHz: HTS

Higher bands under planning stage

Satellite services in use

ISRO Headquarters, Bangalore

C- Band (3.4-3.6 & 3.6-3.7 GHz) also under study

5G Base Stations & UEs to Satellite Receiver 5G BSs & UEs to Satellite Earth Station & User terminals

Interference Scenarios

Satellite to 5 G BSs & UEs Satellite Earth Station and User terminals to 5G BSs & UEs

Interference Scenarios

ISRO Headquarters, Bangalore

Critical System Parameters

Satellite1

IMT 2020/5G2

BS & UEs Peak EIRP

Total Radiated Power (TRP)

Antenna types & patterns

BS down-tilt & elevation

BS density per sq. Km

Cell size

Number of UEs/cell

Satellite/Hub EIRP

Satellite /Hub Antenna &

Pattern

Satellite/Hub Rx. Noise

Temperature

Beam Area

Min Elevation Angle (from

ground)

Orbit (GSO/Non-GSO)

ISRO Headquarters, Bangalore

Methods of Co-existence

Separation distances

Limits on 5G BS (& UEs) power, elevation (down-tilt), density per

Sq Km, antenna pattern, out-of-band emissions, etc.

Band segmentation

Some or all of the above

Critical Aspects in Co-existence Analysis Models/studies used

Clutter loss, BSs & UEs density Whether to be tweaked appropriately for Indian scenario

Implementation of separation distances and other conditions ofco-existence

Predictability of the locations of future Satellite stations mMTC & URLLC services protocols, indoor/outdoor UEs 5G Network Loading Factor (Activity Ratio)

Way Forward

ISRO Headquarters, Bangalore

Protection of the legacy, planned & approved satellites

systems without any constraints

Exhaustive studies on possibility of Co-existence

involving all stake holders

Validation of various models used in the analysis for

Indian scenario

Exploring use of new higher bands for 5G that are not yet

proliferated by satellite systems in India

Adopting band segmentation approach wherever

feasible.

Thanks...