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A cost-effective fault-tolerance control modules using concurrent write method for ATM switching system

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4 Author(s)
Woo-Sug Jung ; Electron. & Telecommun. Res. Inst., Daejeon, South Korea ; Kwang-Suk Song ; Hyeong-Ho Lee ; Boseob Kwon

We describe a novel duplicated fault tolerance control module using concurrent write for ATM switching system. To implement a fault-tolerance control module, we expand the bus between the main memory and memory controller that we called a memory bus. We devise a special kind of switch to implement it. In our approach, the memory is consists of CWM (concurrent-write memory) and NCM (non-concurrent-write memory). The memory controller is always accessible to NCM but is impossible to access a self-CWM in standby mode. In a duplicated operating mode, a memory controller of an active module has a responsibility for the refresh cycle of the standby memory as well as the self-side memory. When a write transaction to memory happens, it naturally reflects an other-side memory with simultaneously by a concurrent-write channel as well as a self-memory. This control module can be widely applied to a commercial system, which require a cost-effective fault tolerance control module

Published in:

Communication Technology Proceedings, 1998. ICCT '98. 1998 International Conference on

Date of Conference:

22-24 Oct 1998