The Cloud offers many opportunities to reduce costs and grow a business. Cloud-based services often present a more economical and simplified solution to the user, but consequently make a highly reliable and robust connection to the Internet that much more critical. Satellite broadband offers a truly unique connectivity solution in many AME regions where terrestrial bandwidth may be sparse or unavailable.
Therefore, moving to the cloud is the logical and inevitable step for most businesses and organizations. Cloud connectivity requires robust and high throughput bandwidth in order to provide users with the most satisfying experience. In the case of Africa and the Middle East, terrestrial connectivity may not be available or may be very costly to deploy. ‘Always-on’ satellite-based connectivity proves to be the logical, and sometimes, only, choice.
Some estimates say that by the end of this year, 2014, over 50 percent of all workload will occur in the Cloud (the balance remaining in traditional data centers) and over 80 percent of new applications will be developed in the Cloud1.
Cloud-based services cover a wide range of applications in three major categories:
For example, Customer Resource Management (CRM) that was typically handled in-house with custom-built solutions is now available in the Cloud as a customizable ‘Software as a Service’ solution. In fact, thousands of companies are today offering cloud-based ‘XaaS’ models with potential cost savings in frontend development, computer infrastructure, maintenance, and training. The cost savings offered by Cloud-based services directly contributes to the growth and economic development in regions by freeing users of the services from the cost and complexity of setting up this capability in-house.
Broadband access and connectivity facilitated by very small aperture terminal (VSAT) satellite networks in the Middle East and African regions have already delivered many benefits such as:
Satellite-based communications have been in operation for decades, providing reliable primary and backup services for a range of industries. In the financial sector, a number of banks, brokerage houses, and financial services companies have been using broadband satellite communications for their primary service, or as an emergency backup to their landline network. Many leading companies in the retail, hospitality, and numerous other industries have been using broadband satellite-based networks to connect their remote locations. In fact, the turnkey managed networks for many such enterprises that have been provided by companies like Hughes certainly qualify as Cloud services, with stringent contractual commitments calling for the highest levels of performance, security, and reliability.
A satellite system must therefore be selected and planned properly in order to provide a high level of reliability and ultimately customer satisfaction. The key aspects of this planning are:
1) Satellite Link Analysis. The link analysis (i.e. link budget) is ultimately what decides the availability of the link. In order to achieve high levels of availability, the link budget may show that, for example, a larger antenna is required. Careful upfront link budget planning will result in far fewer outages due to weather.
2) System Equipment Redundancy. The selected system must offer redundancy of all equipment critical in the operations of the network. For example, within the gateway rack itself, this means that all routers, servers, and common equipment must have either a ‘hot’ standby or be able to take over the full load if a secondary unit fails.
3) Central Communication Diversity. The hub’s uplink/downlink can be affected both by atmospheric conditions which reduce link reliability below acceptable levels or hardware failures. The selected satellite system must be able to provide RFT redundancy such that the two RFT sites can be located far enough apart so that weather affecting one will not affect the other. Typically, connectivity from the hub location to the redundant RFT would be via fiber. Figure 3 illustrates RFT redundancy.
4) Redundant Hubs and Terminal Path Diversity. With the use of two hubs in different locations, the network can be protected, for example, from a natural disaster which disables a primary hub. The satellite terminals must be able to detect the primary carrier outage and automatically switch to the backup hub location. Figure 4 illustrates satellite hub diversity.
5) Efficiency. With the advent of High Throughput Satellites (HTS), space segment prices are dropping significantly. However, the cost of satellite bandwidth remains a significant portion of the operational expense for a satellite-based network. Therefore, the selected system should offer the most efficient use of space segment bandwidth by using Adaptive Coding and Modulation (ACM), advanced coding such as LDPC, Dynamic Uplink Power Control, and other features which maximize the throughput of a link for any given weather condition. In addition, the selected system should offer enhancements to the data layers such as TCP spoofing, header compression, HTTP compression, and prefetch, to name just a few, which reduce the actual number of bytes being transmitted.
6) S e c u r i t y . Any system which is selected to be backbone of a corporate, government, or any other secure application must, of course, include built-in encryption. Secure encryption such as bi-directional 256-bit AES should be available.
7) Scalability. Any system which is selected to provide access for Cloud services should be scalable to allow the business or organization to grow. The system must allow for both capacity expansion at the hub and expansion of the remotes from hundreds to thousands to tens of thousands. Further, with the advent of High Throughput Satellites (HTS) and the bandwidth thirst of XaaS Cloud-based services, consideration should be given to high-density satellite hubs which can be expanded to handle on the order of 1Gbps in a small footprint.
8) Virtual Network Operations (VNO).For data and applications based in a private cloud, VNO capability gives the satellite operator the ability to provide a private network to an organization. This seamless method of operations allows the organization to monitor their private network and provide firsthand response to their end-users similar to a public Cloud-based service provider.
In summary, because the satellite system will form the backbone of the XaaS being accessed in the Cloud, the selected system must be an enterprise-class system with a proven track record.
Satellite connectivity solutions bring many additional benefits beyond basic connectivity alone, including:
In each case, the satellite links provide a unique capability beyond what terrestrial links can offer.
The Cloud offers many opportunities to reduce costs and grow a business. As outlined above, Cloud-based services often present a more economical and simplified solution to the user, but consequently make a highly reliable and robust connection to the Internet that much more critical. Satellite broadband offers a truly unique connectivity solution in many regions of Africa and the Middle East where terrestrial bandwidth may be sparse or unavailable.
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