Pre-Allocation Based Flow Control Scheme for Networks-On-Chip

Shijun LIN  Li SU  Haibo SU  Depeng JIN  Lieguang ZENG  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E92-D   No.3   pp.538-540
Publication Date: 2009/03/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E92.D.538
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: VLSI Systems
Keyword: 
network-on-chip,  system-on-chip,  flow control,  

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Summary: 
Based on the traffic predictability characteristic of Networks-on-Chip (NoC), we propose a pre-allocation based flow control scheme to improve the performance of NoC. In this scheme, routes are pre-allocated and the injection rates of all routes are regulated at the traffic sources according to the average available bandwidths in the links. Then, the number of packets in the network is decreased and thus, the congestion probability is reduced and the communication performance is improved. Simulation results show that this scheme greatly increases the throughput and cuts down the average latency with little area and energy overhead, compared with the switch-to-switch flow control scheme.