Control Mechanism for a Packet Bus Communication Controller
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28
This article describes a hardware mechanism for controlling a communication controller operation. The switching part of the controller is a packet bus, which is also used for implementing a random access function between the node controller and each of the switch ports. Using this mechanism it is possible to transfer state and control information (message passing in hardware) between the switch ports and between adjacent nodes. The control mechanism exploits the broadcast properties of packet bus and, by this, demonstrating an additional advantage of having a shared medium switch. The control operation over the packet bus is independent of the packet switch function.