Group address translation through a network bridge
Patent 4933938 Issued on June 12, 1990. Estimated Expiration Date: 
March 22, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 22, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References Re31852 Station arrangement in data transmission network Method for establishing a limited broadcast path within an interconnected network Lan controller having split bus design Method for implementing a token passing ring network on a bus network Patent #: 4789982 InventorApplicationNo. 326957 filed on 03/22/1989US Classes:370/401Bridge or gateway between networksExaminersPrimary: Safourek, Benedict V.Assistant: Chin, Wellington International ClassH04J 003/02AbstractA method for handling data frames by a bridge between a first network which implements group addressing and a second network which implements functional addressing but does not permit multiple group addressing. A first memory within the bridge receives data frames from the first network and from the second network. The data frames each have a destination address. A system memory within the bridge includes an address table and a translation table. Each entry in the address table has a first field which is a destination address and a second field which indicates if the destination address addresses more than a single station. When the first memory receives from the first network a first data frame having a first destination address, a system processor within the bridge searches the address table for the first destination address to determine whether the first destination address addresses more than a single station. If so, the system processor searches the translation table for a first group address which matches the first destination address and substitutes for the first destination address a first functional address corresponding to the first group address before forwarding the first data frame on the second network.Other References
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