Prasarana Malaysia Berhad (or “Prasarana”), formerly known as Syarikat Prasarana Negara Berhad, is a 100 percent government-owned company which was set up by the Malaysian Ministry of Finance. It is one of the largest public transport companies in Malaysia to operate bus and light metro services via its wholly owned subsidiaries: Rapid Bus and Rapid Rail.
The goal of the extension to the Ampang Line Light Rail Transit (“Ampang LRT”) was to expand Kuala Lumpur’s public transport network to the suburbs of Puchong and Putra Heights. The project planned to add 18 kilometers of new track, 11 new stations, a control center, a rolling stock depot and 10 traction substations to the existing 27 kilometer railway line (consisting of 25 stations, a control center, a rolling stock depot, and 17 traction substations).
Challenges
Since Prasarana took over the operations of the Ampang LRT, the company has faced a number of technical challenges:
• The aging infrastructure along the existing lines could no longer accommodate the growing volume of passenger traffic
• The coverage of the existing LRT network needed to be expanded, in order to provide high quality transportation services, with a larger coverage area and to accommodate more passengers
• The obsolete signaling system needed to be upgraded to a Communications-Based Train Control (CBTC) system, to enable automatic train operations and enhance transportation capacity Cutting-edge and future-oriented ICT technologies needed to be implemented to upgrade to a new signaling system, capable of satisfying the ever-increasing service demands for the next five to fifteen years.
Solutions
The Ampang LRT Extension Project marks the first time that Huawei acted as a Systems Integrator, assuming the complete scope of the railway telecommunications systems. Working closely with George Kent, the overall Engineering, Procurement, and Construction (EPC) solutions provider for this project, Huawei provided an integrated communications system consisting of: A transmission system (backbone), datacom, trunking radio, office telephone, Passenger Help Points (PHP), voice recording, Public Address (PA) system, clock and Supervisory Control And Data Acquisition (SCADA) subsystems, as well as the optical cables and other railway communication devices. Huawei was also responsible for the entire engineering process from design, installation, commissioning, and acceptance.
The integration of such a broad communications system involved complex interfaces, high risks (coordinating and supervising third-party device and service suppliers), and difficulties with overlapping construction and commissioning scenarios. Additionally, strict management was required for all project documentation generated during the design; management; implementation; Reliability, Availability and Maintainability, and Safety (RAMS) study; and testing processes. To address these challenges, Huawei leveraged its strong services capabilities, reliable products, and solutions to implement an end-to-end integrated communications solution, as well as providing delivery services throughout the project.
To build the communications and transmission system, Huawei OSN3500 transmission products were deployed along the extension line to construct a 10G backbone transmission network and deliver mission-critical services, coupled with Huawei S3700 switches which provide access to the specified services. In addition, Huawei S5700 switches were deployed to form four independent IP rings to carry non-mission-critical IP services. The new transmission system is able to interconnect and interwork with the existing transmission system in the following ways:
• Trunk radio system: A Terrestrial Trunked Radio (TETRA) network was deployed along both the original and extension lines to replace the legacy UHF-based radio system. The TETRA system, manufactured by Sepura, was provided by the integrator Comintel.
• Telephone: Huawei’s IP PBX solution was implemented to provide Voice Over IP, or VoIP, services along the original lines and extensions, just like the ip phone systems. The analog telephone system of the original line was migrated and replaced; interconnectivity was also established between the legacy analog telephones and the new system, which allows the devices to be reused.
• PHP: Huawei integrated a Third-party trackside telephone system that allows users to call the customer service centers and dispatch centers with one click and also associates to the CCTV system for recording the help calls in real-time.
• Voice Recording System (VRS): Huawei offered an advanced recording service solution to implement the audio recording of the telephone system and the trunk radio system. Mutual backup, archive, and deletion mechanisms were customized to ensure high reliability of the VRS.
• CCTV: Huawei manufactured high-performance IP cameras which were deployed at stations and trackside along the extension line. The new CCTV equipment meets the urban rail Electromagnetic Compatibility (EMC) requirements and the National Environmental Management Act (NEMA) 4X and IP66 protection levels. In addition, the cameras interconnect with the existing NUUO surveillance software platform and the Network Video Recorders (NVRs) deployed on the original line.
• PA and PIDS: The existing PA and Passenger Information Display Services (PIDS) system from the original line were integrated into the extension line, along with a capacity expansion. The previous PA and PIDS solutions providers are now responsible for both systems throughout the entire line.
• SCADA: Willowglen’s SCADA system was deployed on the extension line to replace the existing SCADA system. The new system monitors all electrical infrastructures and power supply systems along the entire line in real-time and even controls some of the electrical devices. Additionally, the system is able to collect alarm information from other subsystems by means of IP or dry contacts, which assures comprehensive supervision.
Moreover, Huawei provided Prasarana with EN 50126-compliant end-to-end system assurance services. Specifically, EMC assurance services include site surveys, the formulation of EMC standards and relevant processes, subsystem certification, and on-site EMC testing. RAMS assurance services include development of reliability schemes and establishing system reliability prediction models. Security analysis and certification services cover the whole process from design to operation. Last but not least, a comprehensive QA system was set up to ensure the quality of all design and delivery activities.
Leveraging the company’s all-round interface management capabilities, powerful integration verification platforms, and sound organizational processes, Huawei sufficiently verified the functions and performance of interfaces between subsystems by means of pre-integration verification (only for short-list suppliers), with both integration and on-site verification. This ensures stable and reliable interoperability between subsystems, saves integration and commissioning time for the customer, and facilitated timely and efficient delivery of the communications system.
Benefits
The extension project is expected to double the capacity of the Ampang Line system network to more than 400,000 passengers per day, and significantly ease traffic congestion in the southwest areas of Kuala Lumpur.
Construction and reconstruction of ICT infrastructures enabled by cutting-edge technologies will help Prasarana ensure the reliable operations of the Ampang line, improve O&M efficiency, cut down on maintenance costs, and provide an optimal passenger experience.
After the construction is completed, Huawei’s urban rail solution will continue to bring more stable, reliable, and innovative ICT services to Prasarana which helps Malaysia to build a state-of-the-art public transportation system in the future.
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The post Huawei Communications System Extends Ampang LRT appeared first on Huawei Enterprise Blog.
Source: Huawei Enterprise Blog
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