In traditional WMNs with multiple gateways, a unique node u 0 representing the wired network is introduced and there is a unidirectional link from each gateway to u 0 with infinite capacity [15].
Since the aim of our work is to study the network throughput gain in FiWi networks compared with traditional WMNs, to conduct the fair comparison, we model the communication between ONUs and the OLT the same as that in [15] and there is a unidirectional link euu0 ¸ E with infinite capacity for any u ¸ NG in the FiWi network. Since such communication happens in the PON subnetwork, the interference set of such links is also set to be .. The modeling of a FiWi network and its correspondent traditional WMN is shown in Fig. 2.