In many cases, time-slot length is designed much longer than guard-time length to increase the link utilization rate upper bound determined by the ratio of guard-time length to timeslot length. This technique can reduce the number of guard-timcs and improve network utilization efficiency. Assuming Tg, F, B, and V are the guard-time length, the frame length the requested bandwidth and the link capacity of the network respectively, T, which is the required time in a frame to cany' the requested bandwidth, can be calculated by F(B/V)). The number n of timeslots required in single time-slot method and multi-time-slot-bonding are given by \T/(TS - Tg)] and \{T + Tg)/Ts], respectively, and the link utilization ratio is represented by T/(nTs) The utilization ratios using single time-slot method and multi-time-slot bonding for Tg=5 ps and Ts=10 ps or 50 ps are shown in Fig. The link utilization ratio using multi-time-slot bonding with Ts=10 ps is higher than that using single time-slot method with both of Ts=10 ps and 50 ps.