3. Introduction
Our Mission :
“To provide high quality telecommunication services that support future
operational needs.”
This delivering voice, data and video services all across England.
On a dedicated fibre and copper network.
4. All purpose Trunk Roads
“Over the next five years, we will
start to improve the way we
manage traffic on some of our
busiest A roads by transforming
them into Expressways, mirroring
the journey experience normally
associated with our most advanced
motorways.”
Highways England Strategic Business Plan 2015-2020
6. Why not Wireless?
6
Well, why not!
NRTS are undergoing studies to see
the feasibility of wireless networks
deployed on roadside infrastructure.
7. Frequency Bands and channel plan
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VLF LF MF HF VHF UHF SHF EHF
navigational aids
(e.g. loran-C)
Maritime
navigational
signals
Am radio,
maritime radio
VHF television,
FMradio,
navigational aids
satellite
communications,
microwave
systems, WiFi
Shortwave radio,
radiotelephone
UHF television,
celluar phone,
GPS, WiFi
Radio astronomy,
microwave
systems
100 km 10 km 1 km 100 m 10 m 1 m 10 cm 1 cm 1 mm
increasing wavelength increasing frequency
3 KHz 30 KHz 300 KHz 3 MHz 30 MHz 300 MHz 3 GHz 30 GHz 300 GHz
BAND C BAND E
8. Identifying Useful Frequencies
5.4 GHz (Band B)
– Licence free
– Improved output Power compared with 2.4GHz Wifi
5.8 GHz (Band C)
– Improved Interference Protection due to licensing Process
– Less Channels than 5.4 GHz
– Underling technology the same (i.e lower Dev. cost) but Four times the power of Band B
70 / 80 GHz (Band E)
– Interference Protection due to licensing
– High Capacity Communications (Ideal for backhaul)
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9. Microwave links – Fresnel zone clearance
Links require line of sight plus 66% Fresnel zone path clearance
Size of Fresnel zone is dependent on frequency and link length
Clearance needs to be achieved over terrain (hills, landscaping), clutter (trees, man-made
structures) and curvature of the earth.
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Source: Wikimedia.org, FresnelSVG1.svg. 66% of first
Fresnel zone added.
Microwave
66% of first Fresnel zone must
be free from obstruction
10. Bandwidth Availability
281Mbit/s O Mbit/s
2.1min
74 minutes
130Mbit/s167Mbit/s
2.6min
200Mbit/s237Mbit/s
8.5min16.3min44.4min
1 year
281Mbit/s O Mbit/s
2.1min
74 minutes
130Mbit/s167Mbit/s
2.6min
200Mbit/s237Mbit/s
8.5min16.3min44.4min
1 year
Adaptive modulation techniques are adopt to over come rain fade attenuation
Maximum throughput can be maintained all year long except for roughly 74 minutes
The 74 minutes are distributed randomly throughout the year.
IMPACT OF ADAPTIVE MODULATION
11. Conceptual design 4 – CCTV 8Mbit/s variant
Partial LOS Band C cells dimensioned to accommodate data capacity requirement
Microwave is lightly licensed, providing additional power and higher availability
Two backhaul points on larger schemes to increase reliability
11Design concepts
12. Desktop design
IP / MPLS CORE
SPC-A TS
RCC
KEY
CCTV
Message Sign
7705 SAR-8
MSR 2000
Ethernet
Microwave Backhaul Node
SPC-A TS
Microwave Repeater Node
CCTV
Message Sign
Message Sign
7750SR IP / MPLS Core Router
9500MSR Packet microwave
Wireless Link
5.8GHz Band C5.8GHz Band C
Highways Agency End Device
23GHz / 38GHz Microwave
Backbone Links
Message Sign MIDAS
Access Node with multiple STIs
7210SAS-D
CCTV Codec
CCTV
CCTVERT
ERT
ERT
ERT
Up to 50% savings when using wireless technology rather than wire-line implementation
13. Deployment Considerations
Rigid LOS structure needed for MW
Existing infrastructure can be utilised to
reduce costs
Space can be leased on commercial
radio towers as required
14. Motorways Infill Technology
Deployed in isolation
Alternative to cross carriage way ducting
Provides higher channel capacity than copper
Alternative to installing new cable when all
copper have been exhausted.
Solution to copper theft
Longitudinal Cabling
Band C PtP Link
New
service
15. Intelligent Infrastructure
Daily mail UK, 2014
Flash flooding in Surrey & Wireless Sensors
Economical
Requires minimum maintenance
Can be rapidly deployed
16. Conclusion
Economical wireless solution that could enhance existing infrastructure
Rapidly deployed even with no existing infrastructure
Increase our scope of observation and monitoring with the addition of sensors
Modulation methods are present to combat the element
Costs can be reduced further by selecting the appropriate operating frequencies and
making use of exiting infrastructure.
Air Interface Encrypted for Security (AES 256)
