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DVB-S2

 

Data Services

GSM Backhaul

GSM Network Backhaul Solutions

ABS can extend the GSM operator’s network quickly, easily and affordably. ABS bridges the gap between isolated rural areas and expands the service footprint regardless of distance, geographic obstructions or lack of infrastructure.

Linking GSM Network coverage areas wirelessly using any of the ABS satellites, operators can expand their existing networks within weeks, with the flexibility of dynamically re-allocating bandwidth as changing demand patterns dictate. The bordering nature of satellite coverage allows operators to locate mobile switching centers (MSC) and base station controller/transceiver (BSC/BTS) combinations anywhere within a wide footprint, giving operators incomparable independence in designing their network.

ABS can help your company stay ahead of the competition by swiftly designing and implementing flexible solutions that can revolutionize and strengthen with your business.

Turnkey solutions

ABS have developed strong alliances and partnerships with system integrators and hardware suppliers across the globe. Provide us your requirements and we will work with our partners to design and implement a reliable, cost-effective, flexible solution that can boost your business goals. By closely working together, innovative GSM compression technologies can also be implemented to help you maximize bandwidth expenditures. Here is a summary of just a few strategic advantages that we can offer:

  • Provide coverage in areas unreachable by terrestrial links
  • Expand your reach quickly and affordably
  • With ABS technical expertise, and our relationships with our partner systems integrators we can provide quick action implementation
  • Expand as your business grows with broader network horizons
  • Provide redundancy and disaster recovery backup services

Internet Connectivity (IPLC)

The ABS network of satellites (both Ku and C-band), is ideal for supporting IP and data services. IP sources are provided in a load sharing and/or dedicated configuration to increase Link Reliability in between various interconnections:

2-way Asymmetric / Duplex IP Process

2-way Asymmetric VSAT is an asymmetric Internet routing platform. The IP data is time-multiplexed with the telephony data, which allows instantaneous phone calls and Internet browsing. IP access is passed without occupying a phone line. The assigned hub transmits to a hi-speed outbound carrier containing IP data while VSAT’s transmit to an inbound carrier. The VSAT acts as a router thus provide connection of more than one PC. Ethernet port at the VSAT is used for PC connectivity. Using this solution, Internet enabling technologies such as TCP spoofing and Internet Page Acceleration are integrated to guarantee user satisfaction.

Requirements for Remote Terminals:

  • DVB IP receiver (PCI, USB or IP Router)
  • SCPC Modulator w/ Up-converter (CDM-600)
  • Satellite Dish 3m Solid minimum size, LNB and Feedhorn
  • Block-up converter (BUC)/SSPA w/ 5W to 20W
  • Redundant to Satellite Dish 3m above

SCPC Data Links

Satellite access schemes dictate that many VSATs in a network can share bandwidth when communicating with one another or with the Hub. SCPC (Single Channel Per Carrier) VSAT networks allocate its own dedicated channel for communication. The channel is reserved and always ON whether it is used or not. ISPs in developing countries connect to their upstream Internet provider using SCPC circuits as they are constantly in use and ISPs need guaranteed bandwidth to provide their customers with acceptable service levels. In a Hybrid System, VSAT systems will use different access schemes to receive and transmit information. For example, it is common to find VSAT systems using SCPC for transmission but TDMA or FDMA for reception.

At ABS, we realize that the cost of satellite bandwidth can often be a significant portion of the expense in utilizing VSAT services, which is why our engineers tailor design VSAT solutions based on our customer’s specific needs and utilize the most advanced VSAT technologies that manage satellite bandwidth as effectively and efficiently as possible.

CnC (Carrier-in-Carrier) SCPC further reduces the Bandwidth cost to the consumer by mirroring the Forward and Return Bandwidth on the same space segment. A savings of 30%~40% can be realized by using CnC technology for SCPC links.

Requirements for Remote Terminals:

  • SCPC Modem (either CDM-550T/600 or CDM750 CnC for High speed satellite trunks & to reduce BW costs)
  • Satellite Dish 2.4 m Solid minimum size, LNB and Feedhorn
  • Block-up converter (BUC) or SSPA w/ 10 Watts to 20 Watts
  • Redundant to Satellite Dish 2.4m above

VSAT Networks (TDM / TDMA & DVB-S2 ACM)

Asia Broadcast Satellite (ABS) provides cost effective and customized VSAT solutions to meet the needs of SMEs, MNCs, government organizations, as well as other network and communication service providers. With our expert technical staff, industry leading hardware providers and teleport operators, ABS can meet the most unique requirement.

ABS with its available Hub can provide TDM/TDMA VSAT network services with a 9-meter antenna and a VSAT antenna (1.2m to 3m depending on the location). All channels are shared and the remote terminals are online, offering exceptionally fast response times.

The Main TDM/TDMA Network Hub transmits a channel divided into time slots (TDM) that is received by all VSATs, but can also be addressed to a specific group. Each VSAT contends for time slots on a shared (TDMA) inbound channel. If there is a collision in a slot, it will automatically re-transmit after a random time delay. Thus, there are two main channels on the satellite: a TDM outbound from the hub to VSATs and a TDMA inbound from VSATs to the Hub.

There are several advantages to typical TDM/TDMA platforms, ABS engineers have designed a superior network over a mesh solution with the following features:

  • Built-in application QoS to classify and prioritize any application, including Voice.
  • Double-Hop voice has been determined to be acceptable, in real deployments.
  • Built-in Real Time Traffic Management features to minimize jitter and delay across the network even in a severely congested network.
  • CIR (committed information rate) allocation to any remote site with dynamically allocated burstable bandwidth based on demand.
  • CIR allocation by application. This feature allows CIR allocation to be triggered based on a configured application, such as voice.
  • Rapid allocation and de-allocation of bandwidth based on demand. Performed 8 times per second.

VSAT TDM/TDM & DVB-S2 ACM Technical Description:
The Main TDM/TDMA Network Hub transmits a link channel divided into time slots TDMA (Time Division Multiplexing Access). This link (Voice or Data) is received by all Remote Sites (VSAT terminals), or can also be addressed to a specific group depending on the required application. Each Remote VSAT terminal contends for time slots on a shared (TDMA) inbound channel. If there is a collision in a slot, the data is automatically re-transmitted after a random time delay. Thus, there are two main channels on the satellite: a TDM outbound from the hub to VSATs and a TDMA inbound from VSATs to the Hub.

DVB-S2 uses the industry’s leading (FEC) forward error coding technology, Low-Density Parity-check Codes

(LDPC) coupled with BCH coding. This results in a 30-40 percent bandwidth efficiency increase over existing DVB-S systems.  This enables smaller remote antenna’s to be deployed at remote sites. The use of ACM (Adaptive Coding Modulation) is employed to reduce the Modcodes for remotes at beam edge thus ensuring higher link availability rates.

Maritime Telephony & Data Services

The maritime industry has seen a growing demand for telephony and data services.  The maritime VSAT platform offers high speed, ship-to-shore-IP broadband satellite communications.   ABS offers a cost effective, integrated communications solution designed specifically for maritime conditions and applications.