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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0829146 (1992-01-31) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 304 인용 특허 : 0 |
A network or telemetry system which allows virtual services at the application or presentation layer to communicate with other virtual services without regard to the physical interconnections. Each message, called a parcel, includes the information to be transmitted along with a virtual address head
A network or telemetry system which allows virtual services at the application or presentation layer to communicate with other virtual services without regard to the physical interconnections. Each message, called a parcel, includes the information to be transmitted along with a virtual address header. The parcel is provided to a gateway, which inserts the parcel without modification into a packet with address information for the physical through session layers in the packet header. The packet is then transmitted to another network node, which receives and delivers the unmodified parcel to the addressed destination virtual service. A number of parcels from the same or different virtual services can be packed into a single packet for transmission from the gateway in cases where these parcels are all directed to virtual services at the same destination node. Once a session is established, such as between a gateway and a workstation, virtual services at the gateway node and the workstation can communicate with each other without requiring a lot of header overhead for each transmission. Instead, the session need simply be identified. Each gateway typically has one session at a time, but a workstation can support up to 64 sessions simultaneously.
A network having a plurality of nodes coupled together over a communication medium, comprising: at least first and second nodes coupled to said communication medium; a plurality of virtual services associated with at least one device coupled to said first node; means, at said first node, for receivi
A network having a plurality of nodes coupled together over a communication medium, comprising: at least first and second nodes coupled to said communication medium; a plurality of virtual services associated with at least one device coupled to said first node; means, at said first node, for receiving and temporarily storing a plurality of parcels from said virtual services, each parcel containing a parcel information field and a virtual address header; means, at said first node, for multiplexing said plurality of parcels into a single packet, said single packet comprising a packet header and a packet information field, with said plurality of parcels being in said packet information field of said single packet; means, at said first node, for transmitting said single packet over said communication medium during a single session; means, at said second node, for receiving said single packet from said communications medium; means, at said second node, for demultiplexing said received packet into a plurality of parcels; and means, at said second node, for directing each of said parcels to the virtual address specified in said virtual address header information; wherein said virtual address header comprises: a source tag byte with a first range of values identifying instruments and a second range of values identifying workstation-based functions; a destination tag byte with said first range of values identifying instruments and said second range of values identifying said workstation-based functions; a parcel information length byte indicating the length of said parcel information field; a parcel flag byte for indicating a kind of action conveyed in said parcel information field, a type of addressing used and a precedence level; an originator service identifier byte indicating a source virtual service; a recipient service identifier byte indicating a destination virtual service; and a pair of action code bytes indicating an action to be taken in processing said parcel information field at an application layer in said destination virtual service.
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