Off network mobile to mobile calling using SIP protocol

Details Off network mobile to mobile calling using SIP protocol Off network mobile to mobile calling using SIP protocol

2008-04-28

2011-12-13

Kizou, Hassan (Department: 2472)

Multiplex communications

Communication over free space

Combining or distributing information via time channels

C370S324000, C370S328000, C370S338000

Reexamination Certificate

active

08077697

ABSTRACT:
This invention addresses the need to transport high bit-rate data to multiple users, or between users, over wired and wireless means. Specifically, this disclosure describes a new method of enabling communication from mobile phone to mobile phone when no network services are available as long as radio contact between the mobile handsets is possible by reserving un-assigned timeslots in the medium access control protocol super frame structure.

REFERENCES:
patent: 7626966 (2009-12-01), Ruiter et al.
patent: 2006/0040670 (2006-02-01), Li et al.
patent: 2006/0268813 (2006-11-01), Larsson et al.
patent: 2006/0268908 (2006-11-01), Wang et al.
patent: 2007/0171910 (2007-07-01), Kumar
patent: 2008/0205452 (2008-08-01), Chou

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