Systems and methods for mobility management in overlaid mobile communications systems

A method of coordinating communications of a mobile station with first and second overlaid mobile communications systems, the method comprising:

• registering the mobile station with the first mobile communications system;
• and
• concurrently registering the mobile station with the second mobile communications system responsive to the registration of the mobile station with the terrestrial mobile communications system.

A method of coordinating communications of a mobile station with a satellite mobile communications system, the method comprising:

• generating respective copies of a set of authentication tokens at respective ones of the mobile station and the satellite mobile communications system;
• and then
• performing successive registrations of the mobile station with the satellite mobile communications system using successive ones of the authentication tokens.

A mobile communications system, comprising:

• a satellite mobile communications system that supports registration of a mobile station therewith concurrent with registration of the mobile terminal with a terrestrial mobile communications system.

A mobile communications system, comprising:

• a satellite mobile communications system that supports generation of respective copies of a set of authentication tokens at respective ones of a mobile station and the satellite mobile communications system and that is further operative to subsequently accept successive registrations of the mobile station with the satellite mobile communications system using successive ones of the authentication tokens.

A system, comprising:

• a terrestrial mobile communications system that supports registration of a mobile station therewith concurrent with registration of the mobile terminal with a satellite mobile communications system.