Fig. 1. Contention in central module allocation

Fig. 2. Schematic diagram of Ring-Clos architecture

Fig. 3. Initial connection state of R(8) architecture

Fig. 4. Path allocation of optical packet P(0, 0) in R(8) architecture

Fig. 5. Path allocation of optical packet P(4, 4) in R(8) architecture

Fig. 6. Path allocation of optical packet P(1, 1) in R(8) architecture

Fig. 7. Schematic diagram of CDRC algorithm in first stage

Fig. 8. Schematic diagram of CDRC algorithm in second stage

Fig. 9. Schematic diagram of CDRC algorithm in third stage

Fig. 10. Network performance of Ring-Clos and Clos. (a) Packet loss rate; (b) average hop

Fig. 11. Network performance of Ring-Clos under different iterations. (a) Packet loss rate; (b) average hop