Multiplex communications – Special services – Distribution of signal to multiple agent stations
Reexamination Certificate
2006-11-07
2006-11-07
Pezzlo, John (Department: 2617)
Multiplex communications
Special services
Distribution of signal to multiple agent stations
C370S390000, C370S396000, C370S400000, C370S420000, C370S432000
Reexamination Certificate
active
07133371
ABSTRACT:
Methods are described that enable host devices of a multicast IP network to reliably join multicast group address(es) in talkgroup or point-to-point calls. For a talkgroup call, a sourcing host sends “hello” packets or payload to one or more network devices, addressed to a multicast group address. The receiving host issues a join command to the one or more network devices in an attempt to reliably join the multicast group address. If any packets are received by the receiving host within a designated time period associated with the attempt, the receiving host is reliably joined to the multicast group address. For a point-to-point call, a controller sends a pair of multicast group addresses, one designated for sourcing packets and the other designated for receiving packets, to a first and second host participating in the point-to-point call. The designated “source” and “receive” multicast group address are complementary for the first and second hosts. When the first or second host is acting as a source, it sends hello packets or payload addressed to its designated “source” multicast group address. When the first or second host is acting as a receiver, it attempts to join its designated “receive” multicast group address. The first or second host acting as a receiver knows that it is reliably joined to its designated “receive” multicast group address if it receives any packets addressed to that address within a designated time period.
REFERENCES:
patent: 4740954 (1988-04-01), Cotton et al.
patent: 6006259 (1999-12-01), Adelman et al.
patent: 6078957 (2000-06-01), Adelman et al.
patent: 6208647 (2001-03-01), Deng et al.
patent: 6240089 (2001-05-01), Okanoue et al.
patent: 6266339 (2001-07-01), Donahue et al.
patent: 6331983 (2001-12-01), Haggerty et al.
patent: 6515994 (2003-02-01), Chuah et al.
patent: 6654371 (2003-11-01), Dunstan et al.
patent: 6704576 (2004-03-01), Brachman et al.
patent: 6847633 (2005-01-01), Ryu et al.
patent: 2002/0006158 (2002-01-01), Schmidl et al.
patent: 2003/0043804 (2003-03-01), Kumar et al.
patent: 2005/0147086 (2005-07-01), Rosenberg et al.
Helm David
McDonald Daniel J
Senese Thomas J
Hughes Terri S.
Mehra Inder Pal
Motorola Inc.
Pezzlo John
Saladi Indira
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