Transforming Surface Transport's Radio System - Transport for London's Telecommunications Strategy - Dr Dimitris Kaltakis - Senior Product Manager ...
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Transforming Surface Transport’s Radio System -
Transport for London’s Telecommunications Strategy
Dr Dimitris Kaltakis – Senior Product Manager and Design Authority
1
Background
• The radio system is comprised of 10 radio sites and provides mobile radio coverage within the
Greater London Area on frequencies licensed from OFCOM to TfL.
• There are a total of 66 traffic channels distributed to those 10 sites with majority allocated to
dominant sites.
• The current analogue PMR solution was designed to provide voice radio communication for
up to 35,000 calls per day.
• Peak daily calls are now averaging 68,000 with snow/industrial action/major events seeing
over 74,000 calls per day. Latent demand for at least 25% more capacity as indicated by
attempts to contact buses.
• During peak times, the number of calls results in call queuing of unacceptable lengths.
• The amount of time Bus controllers now spend queuing during busy hours has more than
tripled from under 2 hours in 2011 and 4 and a half during the first half of 2015 to more than
six hours.
2
Objectives and Scope
Objectives In Scope:
• Provision of a radio system that will address
the capacity issues and scale for the forecast • Radio equipment at existing radio sites
growth in London’s Bus Fleet over the next
10years, thus helping Surface Transport • Central radio system components
provide a quality bus network.
• Bus radios
• Provision of a resilient, reliable, modern, and
cost efficient communications method
between buses, bus operators and emergency
responders through the upgrade of aging Not in scope
radio system.
• The bus antennas
• Develop a Surface Radio Bridge to enable a • The radio equipment at the existing base sites that can be
hand portable radio service for the areas of reused
London where a direct Private Mobile Radio
(PMR) service is required to deal with • The AVL system and interfaces as well as AVL bus
incidents and major events. components
3Technology and Challenges
Why not LTE now? Challenges
• Redundancy and fall-back mechanisms/access Time
under heavy usage • System already at capacity
• Data costs
• No suitable commercial offering Cost
Quality
What DMR Tier III does:
• Not impact system performance during transition
• Maintain current functionality, high reliability and
low running costs and support existing AVL Migration
interface. • Safety critical 24/7 system
• Increased data capabilities. • In-Frequency migration
• Generic and open interfaces for the bus radio. • Free movement of buses between depots and
• Ability to support an all IP connection within the within a service area
vehicle. • Route re-lets
• Dynamic Network management and optimisation • Night routes
reports and KPIs.
• A low cost private radio network for critical voice
communication and fallback data communication
that other TfL users can bolt onto.
4Migration/Implementation strategy
Key is to de-risk the migration as much as possible
• Comprehensive test regime
• Factory acceptance
• Pilot phases
• Critical Mass
• Full rollout
Dual mode base stations and dual mode bus radios:
• Provides fall back mechanisms
• Allows us to transition the fleet with the least risk
• Allows us to progress with the speed of rollout that we require
Analogue Base
Analogue Base
MPT Classic Node Stations
Stations Buses
Inter installed
Node MPT IP Node Dual mode with dual
mode
Gateway base
radios
stations
DMR Node
5Our Objectives and Plans
The Data Network and Telecommunications vision
“The timely delivery, on a service provision basis, of well managed, cost-efficient and fit-for-purpose data network
and telecommunications services, which satisfy TfL’s current and foreseeable future needs”
The Objectives
The vision will be realised through four key objectives:
1. A reduction in the total cost of ownership of data network and telecommunications services
2. The provision of fit-for-purpose services which deliver what projects and programmes specify they need, where and when they
need it
3. The establishment of best-in-class service management capabilities to oversee the ongoing delivery of the services
4. The implementation of robust and effective governance and control process to ensure optimal benefits realisation
Over-The-Air Voice Services
Provide supportable and fit-for-purpose over-the-air voice services, employing the minimum number of different technologies and
platforms, and adopting long-term industry standards where possible / cost effective to do so
Cellular Voice & Data Services
Deliver a strategic cellular voice and data agreement which is able to satisfy both our user and machine-to-machine requirements in
a cost effective manner
6The End-State Vision
• A single logical TfL network comprising multiple integrated wired
TOC Office
and wireless networks that: Locations Networks
• is a hybrid network based on the most effective blend of Connectivity to street assets
outsourced and owned networks;
The TfL Network
• is available for use by all TfL Modes, where it is needed and
Owned Network
when it is needed; Bought-In Network Services
Services
• provides the required levels of physical and logical security,
Signal
capacity, availability and resilience to support TfL’s needs; Access
Voice and data radiating infrastructure (public & private)
• is based on standard technologies and design patterns; Signal and train control systems
• is scalable and able to cost-effectively cater for known and likely
Station Train Public
future requirements; Networks Networks
Access
WiFi
• is capable of supporting public requirements; and
CCTV ASSET PA CCTV ASSET PA
• is supported by best-in-class service management capabilities
and product governance.
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