GSM signalling for prioritised military LEOs communications

Commercial deployment of low-Earth orbit/medium Earth orbit (LEO/MEO) satellite constellations such as Iridium, Globalstar, and Odyssey will play an important role in the military beyond line-of-sight communications. There are obvious benefits from the military use of satellite based personal communications systems (PCS) because they offer tactical mobility anywhere in the world. A number of issues concerned with the functionally efficient integration of GSM signalling and services with a military LEO mobile communication satellite system are considered. It introduces modified GSM signalling procedures which provide for prioritised access and call set-up, and reduced call set-up delays.