D-TDMA
The high cost, and in some regions limited availability, of bandwidth means that a satellite network must be extremely efficient in how it handles the processing and transmission of data.
iGT’s inroute (or upstream) access method is based on D-TDMA (Deterministic - Time Division Multiple Access). iGT utilizes this patented D-TDMA access technology to provide simultaneous high-speed access to shared upstream channels using dynamically assigned time slots. The iGT system constantly analyzes the network demand and allocates bandwidth to each remote based on traffic demand at each remote location, and network operator imposed QoS profiles. The deterministic nature of the bandwidth allocation algorithm used by the iGT systems allows for a very rapid distribution of burst time plans to the remotes in a network – 8 times per second by default.
This type of deterministic architecture allows the system to take advantage of the statistical nature of bursty TCP/IP traffic, creating efficient transport of data traffic. In addition, the D-TDMA protocol’s rapid allocation of bandwidth provides for superior performance of real-time applications and the ability to deploy application specific QoS. Application specific QoS provides prioritization and bandwidth guarantees to different types of traffic per remote. For example, one can prioritize VoIP traffic over HTTP traffic or prioritize video traffic over file transfers. Bandwidth allocation and prioritization can be triggered by Source/Destination IP, Source/Destination subnet, Source/Destination Port, DiffeServ/TOS bits, VLAN ID and/or by protocol type.