In 2009, Hughes was contracted to develop the next generation core architecture for the Globalstar mobile satellite phone and low-speed data communications network. Backed by solid performance on previous outsourcing efforts, SED was sub-contracted by Hughes to design, develop, deliver, and support the Resource Management System (RMS) component of the Globalstar Radio Access Network (RAN) gateways.
The RMS is a highly-available fault-tolerant software system that manages the data-path components of the RAN in real-time to provide pre-planned service to beams and sub-beams during each pass of the low-earth orbit satellites. During each pass, in preciously timed intervals of milliseconds, the RMS allocates portions of the payload’s available power to each beam providing service. At each interval, the RMS allocates power based on received power utilization reports and requests for additional power while considering the satellite, polarization, and beam power limits. Power demands that exceed limits are reduced based on configured priority for various categories of demand. The RMS also manages the payload’s longer-term power requirements, including monitoring satellite power usage over time and reducing the received satellite power limits as needed to ensure that satellite energy limits are not exceeded over the satellite visibility period.