By Nikola Kromer, Senior Director Product Marketing, iDirect
The need for greater resiliency to your High Throughput Satellite (HTS) network is apparent: Just ask Denis Sutherland, who pointed to five reasons in his last blog.
As he outlined, HTS satellite architectures oftentimes drive a higher concentration of hub equipment at the central gateway site. Higher throughputs on HTS drive larger scale and service complexities resulting in massive networks with thousands of remotes managed by fewer gateways. Scaling many more networks and customers from fewer gateway locations introduces a greater need for network resiliency, and more specifically, teleport and gateway reliability.
Protecting the network from service degradation, service interruptions or even catastrophic events is key to ensuring a very high availability and reliability of the HTS network. And since quite a few HTS constellation leverage Ka-Band, where its frequency has a higher susceptibility to rain fade compared to Ku-band and C-band, maintaining consistent network availability under all weather conditions requires special features.
The Reliability of the Network and its Components
At iDirect, we have designed our platform to have built-in high availability on all aspects of the hub infrastructure ranging from superior line card availability and hub component redundancy, to rain diversity and all the way to complete gateway redundancy. Read More
By Denis Sutherland, Director of Business Development, iDirect
It has always been critical to ensure that satellite communications infrastructure remain online, and operational. High Throughput Satellites (HTS) introduce many reasons for redundancy and resiliency—five reasons, to be exact. Let’s take a look.
1) Gateway Architecture
One of the critical factors that impact satellite operators and service providers is the architecture of a high throughput satellite. Centrally located hub infrastructure accessing a gateway beam, a feeder link, leads to an increased amount of traffic generated from a single teleport, which equates to greater risk of network failure or service impact from uplink degradation. This is particularly relevant in the case of Ka-band, as its frequency has a higher susceptibility to rain fade compared to Ku-band and C-band. Since Ka-band frequencies are particularly prone to rain fade, a network must also leverage adaptive modulation techniques, such as Adaptive Coding and Modulation (ACM) and Adaptive TDMA, to achieve the maximum data throughput and optimized traffic in changing weather conditions.
In many cases satellite operators that are managing the teleport will make provision for service degradation such as for weather so severe that ACM can’t protect the link, or for a failure in the teleport. This will also drive operators to consider smarter gateway diversity, ensuring that failure in one gateway, will be backed up in a different location. This is the case with Telenor’s Thor 7, as explained here, which has two uplinks in Norway to achieve carrier-grade availability.
2) Scale of Networks
In a previous blog I considered how HTS networks will increase in scale. There will be additional network infrastructure with HTS, due to increased numbers of beams, more terminals, and higher data rates. As the networks grows the need for reliable network infrastructure increases. Read More