
US Patent No: 5,187,708
Number of patents in Portfolio can not be more than 2000
Communication device for layered protocols
Stats
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Feb 16, 1993
Issued date -
Oct 3, 1990
filing date -
07/592,531
serial no -
Expired
status
Importance
Abstract
A communication device comprising an upper layer communication control unit having a plurality of upper layer communication protocols; a lower layer communication control unit, subordinated to the upper layer communication control unit, having a function to forming an inter-upper-layer communication by transmitting the data sent from the upper layer communication control unit to a communication transmission path or sending the data received from the communication path to the upper layer communication control unit; and a communication path register memory for storing a set of the address of a communication partner device, the discriminator of the upper layer communication protocol being used and the name of a communication path. In the above communication device, a request of setting/cancelling of the communication path, or a transmission request as well as designation of the communication path to be used is performed from the upper layer communication control unit to the lower layer communication control unit, and indication of setting/cancelling of the communication path, or indication of the communication path used as well as reception indication is performed from the lower layer communication control unit to the upper layer communication control unit.
First Claim
Related Publications
International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,893,307 Method and apparatus for linking SNA terminals to an SNA host over a packet switched communications network | 163 | 1988 | |
| 4,991,133 Specialized communications processor for layered protocols | 145 | 1988 | |
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| 4,941,089 Input/output network for computer system | 144 | 1986 | |
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| 4,922,484 ISDN remote switching unit for accommodating analog and digital lines | 26 | 1988 | |