Mobile Subscriber definition in Computer Security terms:
Definition(s): As defined in IEEE 802.16e-2005, an SS capable of moving at vehicular speeds and that supports enhanced power management modes of operation. MS devices typically have a small form factor and are self-powered, e.g., laptops, ultra-mobile portable computers, cellular telephones, or other portable electronic devices.
Source(s): NIST SP 800-127
reference: CSRC Glossary