Presenting a Multi-Criteria QoS-Aware Fault Tolerant Routing Algorithm for Network-On-Chips
Subject Areas : electrical and computer engineering
Alireza Mahjoub
1
,
Fatemeh Vardi
2
,
Roya Rad
3
1 - Islamic Azad University, Karaj branch
2 -
3 -
Keywords: Network on chip, routing algorithm, fault tolerance, adaptive approach, reliability,
Abstract :
Network-on-chip is a router-based paradigm that determines the path of packet passing from the source to destination by a routing pattern through simplified protocols of the public data communication network. Sometimes, it is impossible to send packets from source to destination due to the communication problems caused by network elements in NoC such as routers and faulty links. In most cases, fault-tolerant algorithms select a reliable path using definite criteria. Therefore, in this paper, a reliable path is selected using a multi-criteria decision making technique through an adaptive approach according to the density status received from the adjacent nodes along with the path length so that when a failure occurs, a reliable path with similar QoS features is replaced by rating different paths among network nodes. The weight path selection strategy in NoCs to detect the minimal output port and multi-criteria decision making approach with VIKOR method has improvement over the basic routing algorithm in terms of delay and throughput. The algorithm hardware overhead has a reasonably low cost that maintains scalability for large scale On-Chip networks implementations.
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