Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2005-02-15
2005-02-15
Nguyen, Phu K. (Department: 2671)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
Reexamination Certificate
active
06856623
ABSTRACT:
There is provided a communication system (1) such as an ATM-PON including a station-side unit (2) having a point-to-multipoint message generating unit (2A) and a group designation message generating unit (2B) and subscriber-side units (4-1to4-N: N is a natural number) each having a point-to-multipoint message processing unit (4A) and a state control unit (4B). The station-side unit (2) sends a group designating message to some of the subscriber-side units (4-i:i=1 to N), thereby to designate some of the plurality of the subscriber-side units as a component constituting a group of units which are to receive a point-to-multipoint message, and only the subscriber-side units (4-i) controls to bring the reception and the processing on the point-to-multipoint message to a valid status. With this arrangement, only specified components constituting a group of units can be made to receive the point-to-multipoint message. Thus, it becomes possible to avoid unexpected erroneous operation which can be caused if information specific to a vendor of some of the subscriber-side units (4-i) is sent to all of the subscriber-side units. Moreover, it becomes possible to provide information to the specified components constituting a group of units within a very short period of time.
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Edasawa Masanobu
Hamasaki Motoshi
Kuraya Hisayoshi
Murakawa Hiroshi
Fujitsu Limited
Katten Muchin Zavis & Rosenman
Nguyen Phu K.
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