VSAT, Networking, and Hobby

A satellite link is a radio link between a transmitting earth station and receiving earth station through a communications satellite. A satellite link consists of one uplink and one downlink; the satellite electronics (i.e., the transponder) will remap the uplink  frequency to the downlink frequency. The transmission channel of a satellite system is a radio channel using a direct-wave approach, operating in at specific RF bands within the overall electromagnetic spectrum as seen below : The table below shown some key of physical parameters of relevance to satellite communication,  The frequency of operation is in the super high frequency (SHF) range (3-30 GHz). Regulation and practice dictate the frequency of operation, the channel bandwidth, and the bandwidth of the subchannels within the larger channel. Different frequencies are used for the uplink and for the downlink. Frequencies above about 30 MHz can pass through the ionos...

The IoT is expected to continue its trans-formative potential across industries in the foreseeable future, with 2016's momentum expected to lead spending in the IoT space. The major IoT opportunities will be in the deployment and management of IoT projects. This will lead to ad requirement for new skill sets which are currently scarce in the APAC region. There will also be a shift towards computing decentralization as the IT industry gradually shifts towards using more IoT technology. Example include P2P networks becoming more widely used, allowing connected devices to communicate directly with each other rather instead of being routed through a centralized data center. IoT will heavily influenced by "cloudification" and this will lead to its own set of challenges. These include the large amounts of data involved, realignment of existing processes and security solutions. Cybersecurity is also paramount as the security paradigm is increasingly shifting to ph...

The Internet of Things (IoT), also known as Machine-to-Machine (M2M), is hardly a new market for satellite Industry. M2M has been around for years in the form of SCADA (Supervisory Control and Data Aquisition), an industrial control system for remote monitoring and control. The M2M protocol is designed to be quite compact and data rates are low which have long made this technology cost effective over satellite. Where IoT differs is in volume. A typical SCADA system might involve a few hundred sensors across a pipeline network. Today's IoT system are scaled for thousands of endpoints, and are designed for flexibility in terms of bandwidth. For example, an IoT system may transmit low-resolution video but automatically switch to high-resolution video on a single camera when triggered by a motion sensor. Growth in IoT is projected to be astronomical : anything from 25 billion to 50 billion connected devices by 202, depending on which survey you read, f...