ENHANCED BUS SERVER
Original Publication Date: 1997-Jun-01
Included in the Prior Art Database: 2002-May-28
Charles Sloan: AUTHOR [+3]
AbstractIn communications infrastructure, it is desirable to provide fault tolerance without excessive cost increase to the system. A process that achieves the goals of fault tolerance and cost containment is described below. This process recovers a bus server in a wireless switched system.
MOlVROLA Technical Developments
ENHANCED BUS SERVER
by Charles Sloan, Carl Kraco and Vladimir Pasman
In communications infrastructure, it is desirable to provide fault tolerance without excessive cost increase to the system. A process that achieves the goals of fault tolerance and cost containment is described below. This process recovers a bus server in a wireless switched system.
The system contains a Device Manager that manages one or more subsystems. Each subsystem contains a Bus Server that facilitates communica- tion with peripheral devices within the subsystem. These peripheral devices may include one or more Switching Devices. A Switch Manager sets up circuits on each Switching Device via the Bus Server. Switching Devices and other peripheral devices may remain in service during the period that the Bus Server is out of service. Circuits that were set up before the Bus Server went out of service will remain connected, however no new circuits can be connected while the Bus Server is out of service.
The goal of this recovery process is to maintain service on existing circuits while recovering the Bus
Server functionality. One method of accomplishing this goal is to move the Bus Server to another processor. However, some subsystems do not require more than one processor for normal opera- tion. Therefore, adding an additional processor in
each subsystem for the sole purpose of providing a redundant Bus Server may add considerable expense to the system. This process recovers the Bus Server in a subsystem that contains one or more processors, without affecting existing circuits. A standby processor is not required in order to recover the Bus Server, unless there...