By Denis Sutherland, Sr. Manager, Sales System Engineering
In my last blog, I discussed how ground infrastructure providers like iDirect have a tricky job keeping their technology at the pace of change of developments in space. Much has been said about the exciting changes in the VSAT industry, not least with the many High Throughput Satellites (HTS) launched or planned.
The reality is that there is no common way to build an HTS satellite. O3B is exceptionally different from the other constellations, but we have also seen many other differences in terms of numbers of beams, size of transponders, polarization, onboard process and many other factors. I talked about some of the different business models here.
One thing they have in common is that HTS brings many more beams to cover a similar geographical area. For example, a typical Ku satellite beam could cover Europe, but with an HTS Ka satellite, you may require 30 or more beams. This multi-beam frequency reuse is obviously one of the key advantages of an HTS architecture, but I will not talk about that here. Intelsat do a very good job on the “teach in video” you can view: http://www.intelsat.com/blog/intelsat-presents-a-high-throughput-satellite-teach-in/
Let’s consider how this change impacts the ground vendors or service providers using a TDMA platform like iDirect. With a non-HTS Ku satellite, from a design perspective, we would assume for Europe wide coverage that a single DVB-S2 outbound would sufficiently cover the continent, up to a limited amount of total IP traffic, and we can run some sophisticated modeling to work out numbers of terminals contention ratios, SLA, rain fade with resultant ACM impact. Easy! Read More
By Dave Davis, Sr. Systems Engineer, iDirect Europe
In my last blog I looked at the rise of aero platforms in the Defence and security environment using SatCom, particularly UAVs.
I mentioned that there were some challenges when operating in the aero environment and I’ll address those in this blog.
In the commercial sector, the main thrust is large amounts of data on the downstream to the aircraft. The military sector wants the data, particularly video streams, to be passed largely on the upstream, i.e from the aircraft. This offers some challenges when using IP technology, designed around web traffic, which traditionally pulls more data from the core network on the downstream than it pushes back via the upstream.
The use of SCPC is often the most efficient method of getting a live video stream off a platform, but having the ability to switch back to Adaptive TDMA once the video stream is complete means that the C4 (Command, Control, Communications and Computers) element will be operating at its most effective. When using Adaptive TDMA, employing TRANSEC ensures that the link is protected and security is assured. Read More
From Via Satellite
High Throughput Satellites (HTS) is undoubtedly one of the industry’s hottest topics, no longer confined to a few geographies. As HTS “globalizes,” new questions arise such as how platforms will tend to evolve worldwide; what challenges and opportunities are expected from the emergence of empowering service architectures; and the business models and technologies behind them. With the entire satellite industry gradually transitioning to HTS, these are important debate topics. They affect all stakeholders in the satellite broadband, backhaul and trunking ecosystems including manufacturers, satellite operators, telcos/MNOs, service providers, broadcasters, technology vendors and — most importantly — end users.
Central to the HTS debate is the topic of the business models and, in particular, the pros and cons of the so-called “closed” and “open” network architectures. This is subject to further exploration, debate and clarification during Satellite 2014.
“Closed” HTS Models
The number one goal through this architecture is achieving the lowest possible operational cost per bit on the satellites. This usually pushes HTS architectures toward some degree of vertical integration; such as when the roles of the satellite operator, network infrastructure and IP service are integrated and managed by a single player. Prime examples of this model are HughesNet and ViaSat exede in the U.S. and Eutelsat tooway (KASAT) in Europe. Continue>
iDirect’s Terry Neumann
Market forecasts show that the number of maritime vessels relying on VSAT as their primary means of communications will more than double by 2016, to more than 26,000. Terry Neumann, iDirect’s director of market strategy, talks current trends and future direction of this market with regards to HTS.
Set the current stage with regards to the adoption of VSAT broadband in maritime and where you see the biggest opportunities ahead.
Neumann: We have already seen operators in segments like cruise, offshore oil and gas, and super yachts heavily adopt the use VSAT technology. They are actively leveraging their VSAT networks to help improve ship-to-shore communications, boost business productivity and address crew welfare. Demand in these markets continues to grow as new IP applications are increasing throughput requirements every year.
Outside of these segments there is still plenty of opportunity for VSAT broadband to further permeate the maritime market. Large market segments, like industrial fishing or commercial shipping, have been slower to adopt VSAT despite the fact that they could greatly benefit from using VSAT for all the aforementioned purposes and more. To date, they have been hesitant to adopt due to a range of variables including cost and bandwidth requirements. Read More