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The World Radio Congress November 2019
Satellite spectrum from VHF to V Band
• Orbcomm 137-138 MHz, 148-149.9 MHz
• 20 year history – constellation just upgraded launched by
Space X
• 31 micro satellites (170 kg) at 775 kilometres
• 250 watt communications payload
• Caterpillar, Hitachi Construction, John Deere, Komatsu,
Volvo
• Dual mode VHF + cellular modem
• AIS for maritime
GSO MEO and LEO coexistence and 5G?
GSO density
ITU now allow 2 degree orbit separation=180 satellites
But satellites could potentially be ten times larger and heavier and more powerful than existing
satellites
50,000 kilograms not 5000 kilograms
150 kilowatt rather than 15 kilowatt
Spectrum, orbits and scale
Rocket innovation – impact on flux density
Space price list
Pluto with baggage allowance
8000 LEOS ?
Iridium Globalstar Sky Space
Global
OneWeb Space X Leo SAT Boeing
L Band L and S band UHF, L and S
band
Ku and Ka Band Ku and Ka Band Ka Band V Band and C
Band
78 LEOS 24 LEOS 200 LEOS 650 LEOS 4000 LEOS 78 LEOS 2956 LEOS
780 km 1414 km 500-800 km 1200 km 1200 km 700 km 1200 km
860 kg 700 kg 10 kg (Cube SAT) 200 kg 100-500 kg 860 kg ?
Potentially six thousand cube SATS to LEO on one Falcon Heavy
Iridium Next (L band)
• January 14, 2017– the first payload of ten Iridium
Next satellites launched and deployed into low-Earth orbit
(LEO) by Space X
• First of seven launches over the next 15 months - 10 per
launch - largest ever and fastest ever slot swop
• Includes real time global aircraft tracking (includes polar orbits)
Commercial innovation Inmarsat L Band S Band
Band 1 Inmarsat Band 1 Inmarsat
Mob TX Earth to Space Mob RX Space to Earth
1920-1980 1980-2010 2110-2170 2170-2200
• Partnered with Deutsche Telekom, Nokia and Thales- regulatory issues and or Band
1 5G pass band extension opportunity ?
Regional interests - Dish Networks S Band in the US
• Jun 16, 2016 10:41am
• 3GPP formally approved Band 70
• Aggregation of three bands owned by Dish Networks
• AWS-4 spectrum (2000 MHz to 2020 MHz)
• H Block downlink spectrum (1995 MHz to 2000 MHz)
• Unpaired AWS-3 uplink spectrum (1695 MHz to 1710
MHz).
• Regulatory challenge- TV broadcast +mobile and fixed
wireless broadband
Satellite Pay TV
• C-Band (3.7-4.2 GHz)
• 250 channels of video and 75 audio services using dishes which
average 7 feet in diameter. C-Band dishes are steerable, enabling C-
Band users to receive signals from 20 or more satellites.
• Ku-Band (11.7-12.2 GHz) (12.2-12.7 GHz)
• 200 channels to 18 inch diameter dishes (MVDDS coalition is asking
the FCC to re-examine technical limits in the 12.2-12.7 GHz band so
that it can offer 2-way mobile broadband services instead of 1-way
fixed service as currently permitted).
• Ka-Band (18.3-18.8 GHz + 19.7-20.2 GHz) – high definition
broadband
ITU WARC 2019
28 GHZ band HTS GSO incumbentsAustralian National Broadband Network satellites (2 satellites), IPStar (4 satellites), Inmarsat Global
Xpress (4 satellites), O3b MEO (12 satellites), Viasat (4 satellites), Jupiter (2 satellites), Hylas/Avanti
(2 satellites), Amazonas 3, Space way 3, Wild Blue1, Superbird4, AMC 15 and 16 and a bunch of
direct TV satellites.
The NEW LEOS Ku-band spectrum rights acquired from Skybridge by OneWeb (from the July 2016 FCC Filing).
O3b MEO Ka Band
• Angular power separation
Constellation coexistence - SES/O3b
• Angular power separation
30,000 formed beams system wide
12 satellites in MEO (8 more in 2018)
50 satellites in GSO
Digicel and Singtel as customers
Coverage of +/- 50 degrees latitude for nearly 400 million km²
Full global coverage possible via inclined planes
1gbps trunking for 5G
Constellation coexistence- SES/O3b
With thanks to SES
New LEOS OneWeb Ku and Ka Band
Definition of the avoidance angle
HAPS angle of arrival as comparison
HAPS at 21 km
http://www-tsc.upc.es/haps/docs/full_space-time_coding.pdf
Could angular power separation support
band sharing between 5G and satellite?
KA Band HTS commercial/military dual band
• Most HTS entities typically file for 3.5 GHz bandwidth in the following
Ka-bands:
• 27.5 – 31 GHz uplink
• 17.7 – 21.2 GHz downlink
• with the following bands for the military .
• 30 – 31 GHz (uplink)
• 20.2 – 21.2 GHz (downlink)
• Ka-band payload of the Inmarsat Global Xpress™ satellites can be
switched between military and commercial frequencies – ambitions to
serve Unmanned Aerial Vehicles (UAV) military market.
• Landing rights have to be negotiated on a country by country basis
• Spectral and space and terrestrial ground station assets the basis for
satellite industry gearing
5G PPP E Band
Do we need satellite in 5G phones?
• In 4G and 5G smart phones as data rate increases data reach reduces
• More bands, wider pass bands and more technologies and parasitic loss
and RF efficiency loss at mm frequencies
• High surface absorption and scatter in millimetre bands at lower inclination
angles
• High count LEO constellations will be Nearly Always Nearly Overhead
(NANO)
• Flux density from fractional beam antennas can be higher than terrestrial
and long distance latency for inter satellite switched constellations (over
10,000 kilometres) will be lower due to slowness of fibre
• Twenty year operational life expectancy of LEO’s
• Lower launch costs
Do we need satellite in 5G phones?
• The cost of getting to space is measured by weight. The OneWeb
satellites being built by Airbus in Toulouse and Florida are,
unusually, lighter than planned, weighing in at 145 kilogrammes.
• Each 14.5 kilogrammes yields 1 gbps of throughput.
• With nearly 2000 satellites in orbit and ten gbps per satellite that
suggests a 20 terabit per second network with Mr Musk probably
thinking about something significantly larger with tighter more
controllable latency than anything deliverable across future 5G
terrestrial networks.
• No site costs, no electricity costs, bandwidth where you need it
when you need it with a higher flux density than 5G in many urban
and rural environments.
VSAT innovation VHF to V Band
VSAT innovation
• Kymeta meta material based antennas
Materials that have properties that are not found in nature and are usually
arranged in repeated patterns at scales that are shorter than the wavelengths
of the medium with which they are intended to interact.
VSAT innovation
• Metawave 32 element antenna
VSAT innovation
• NANO coverage
Nearly always nearly overhead would support low cost passive high count antennas with narrow cone of
vertical visibility
Smart phone screen could have a 8, 16 or 32 element embedded antenna – put it on its back and it will
work- anywhere in the world
VSAT in a smart 5G/satellite phone
Existing satellite phones designed to capture flux density from low elevation to high elevation angles
5G satellite phone could have a 8, 16 or 32 element embedded antenna
Put it on its back looking directly upwards and it will work - anywhere in the world
Standards and spectrum FR1 and FR2
• 5G spectrum is closely coupled to the 3GPP ‘new radio’
(NR) standards process. The relevant work group is
RAN4, with 5G new radio defined from Release 15
onwards in two frequency ranges (FR), FR 1 from 450
MHz to 6000 MHz with bands numbered from 1 to 255
commonly referred to as sub 6 GHz and FR 2 from
24250 MHz to 52600 MHz (24.252 GHz to 52.6 GHz)
with bands numbered from 257 to 511.
• The channels within the bands are a maximum of 100
MHz for sub 6 GHz scaling from Bands 41, 42 and 43
upwards and 400 MHz for mmWave.
The 27 RAN4# defined bands for FR1
Band number Uplink (MHz) Downlink (MHz) Duplex Mode
N1 1920-1980 2210-2710 FDD
N2 1850-1910 1930-1990 FDD
N3 1710-1785 1805-1880 FDD
N5 824-849 864-894 FDD
N7 2500-2570 2620-2690 FDD
N8 880-915 925-960 FDD
N20 832-862 791-821 FDD reverse duplex
N28 703-748 758-803 FDD
N38 2570-2620 2570-2620 TDD
N41 2496-2690 2496-2690 TDD
N50 1432-1517 1432-1517 TDD
N51 1427-1432 1427-1432 TDD
N66 1710-1780 2210-2200 FDD
N70 1695-1710 1995-2020 FDD
N71 663-698 617-652 FDD reverse duplex
N74 1427-1470 1475-1518 FDD
N75 1432-1517 SDL
N76 1427-1432 SDL
N77 3300-4200 3300-4200 TDD
N78 3300-3800 3300-3800 TDD
N79 4500-5000 4500-5000 TDD
N80 1710-1785 SUL
N81 880-915 SUL
N82 832-862 SUL
N83 703-748 SUL
N84 1920-1980 SUL
N85 2496-2690 SUL
FR2 bands in Release 15
Band number Uplink (GHz) Downlink (GHz) Duplex Mode
N257 26.5-29.5 26.5-29.5 TDD
N258 24.75-27.5 24.75-27.5
N259 31.8-33.4 31.8-33.4
N260 37-40 37-40
The US, Korea and Japan are also planning to deploy in the 28 GHz band, coexisting with
existing backhaul allocations and therefore supporting in band backhaul. Other regions are
proposing other bands
5.925-8.5 GHz, 10-10.6 GHz in Europe
7.075-10.5 GHz and 15.35-17.3 GHz in Africa.
LTE and or 5G carrier combinations (CC)
Carrier combination Total number of combinations proposed
LTE_1CCNR_1CC 99
LTE_2CC_NR_1CC 101
LTE_3CC_NR_1CC 69
LTE_4CC_NR_1CC 24
LTE_5CC_NR_1CC 1
CA intra-band x DL/1UL 2
CA intra-band 2DL/1UL 13
LTE_1UL_NR_ULDL 4
LTE_1CC_NR_2CC 5
LTE_2CC-NR_2CC 6
LTE_3CC_NR2CC 4
LTE_4CC_NR_2CC 1
Total 329
5G and satellite channel rasters
Satellite FDD pass bands of 3.5
GHz typically deployed with 250
MHz channel rasters
5G and satellite network coexistence
• The proposed extended FR1 C band and FR2 Ku, K and Ka band spectrum options
are proposed as TDD deployed in bands that are either expected to coexist or be
adjacent to satellite FDD uplinks and downlinks.
• Apart from the timing and clocking issues of TDD, the channel raster allocations for
5G based on multiples of the 15 KHz sub carriers and are expected to co-exist with
the 250 MHz channel raster used in satellite uplinks and downlinks which then scale
to 1 GHz and 2 GHz pass bands in V and W band and E band.
• The channel throughput constraints in 5G are countered by the use of 1024 QAM
(assuming high SNR) which could cause significant spectral splash into adjacent
channels including satellite receive channels.
• Other modulation options with less envelope variation are supported including lower
order QAM and BPSK though there is no support for the default PASK used in most
satellite transponders.
• Note that PASK is used to deliver maximum RF Power amplifier efficiency and would
be equally useful for terrestrial node B transceivers in applications where energy is
scarce and expensive – rural Africa and Latin America being two examples.
5G and satellite network coexistence
• In order to improve bandwidth efficiency, 5G resource blocks are supported to the
band edge, for example the whole 20 MHZ of a 20 MHz carrier compared to LTE
where 100 resource blocks sit within an 18 MHz channel in a 20 MHz carrier. This
trades an improvement in in band efficiency against higher Out of Band (OOB)
transmissions.
• The 3GPP standards process is therefore producing the worst possible coexistence
conditions, guaranteeing adversarial arguments over future 5G to satellite protection
ratios. Vertical to horizontal power separation will solve some of these problems but
not all of them.
Why high count LEOS are useful to 5G
• The FCC has given OneWeb the regulatory authority to deploy a minimum of 720
satellites and a maximum of 1980 satellites into low earth orbit at 1200 kilometres
using Ku band spectrum with full deployment by 2027. Space X has clearance to
deploy 4425 satellites using Ku and Ka band again with a nine year deployment
requirement with 50% deployment within six years.
• In telecoms time this is the equivalent of tomorrow and would produce two networks
with complete global land and sea coverage where at least one satellite will be
nearly always overhead nearly all the time.
• Combined with intersatellite switching (for example in the proposed Space X
constellation) long distance end to end latency will be significantly faster over
satellite when compared to fibre
•
LEO latency
Australia from the east coast to west coast is 4000 kilometres - a coast to coast
travel time of 13 milliseconds. Africa North to South is 8000 kilometres=26
milliseconds
The size of Africa
Satellite latency-LEOSAT
• LEOSAT has a similar constellation proposal to Iridium based on the same space
system platform provided by Thales but utilising 7 GHz of paired spectrum (3.5+3.5
GHz) at Ka band for individual user uplinks and downlinks (compared to 10+10 MHz
of paired spectrum in L band available to Iridium) and optical inter satellite switching.
• The FCC filing is based on 120 to 140 satellites in a similar polar orbit to the Iridium
Next Constellation.
• The business model is however focussed on delivering a performance gain over long
distance fibre based on the fact that radio and light waves in free space travel faster
than radio and light waves in fibre.
• Over distances of more than 10,000 kilometres this speed advantage outweighs the
additional route length (the earth to space, space to earth hop) providing a latency
gain for high value applications such as high frequency trading, the oil and gas
industries, corporate networking and government agencies
• LEOSAT are working with the European Space Agency on 5G and satellite
‘transversal’ activities.
•
Coca Cola and OneWeb
Guinness
40% of Guinness production worldwide is drunk in Africa
By 2010, Nigeria surpassed Ireland to become the second largest
market for Guinness consumption.
5G and Satellite Resources
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