 
                                                                                | Article ID: | iaor19993198 | 
| Country: | United States | 
| Volume: | 23 | 
| Issue: | 1/4 | 
| Start Page Number: | 177 | 
| End Page Number: | 195 | 
| Publication Date: | Jan 1996 | 
| Journal: | Queueing Systems | 
| Authors: | Chen Hong, Zhang Hangin | 
| Keywords: | queueing networks | 
The diffusion approximation is proved for a class of queueing networks, known as re-entrant lines, under a first-buffer-first-served (FBFS) service discipline. The diffusion limit for the workload process is a semi-martingale reflecting Brownian motion on a non-negative orthant. This approximation has recently been used by Dai, Yeh and Zhou in estimating the performance measures of the re-entrant lines with an FBFS discipline.