METHOD FOR DYNAMICALLY ALLOCATING BANDWIDTHS IN GIGABIT ETHERNET-PASSIVE OPTICAL NETWORK

摘要

PURPOSE: A method for dynamically allocating bandwidths in a GE-PON(Gigabit Ethernet Passive Optical Network) is provided to improve the utilization coefficient of network resources in consideration of the bandwidths requested from ONUs(Optical Network Units). CONSTITUTION: An OLT(Optical Line Termination) divides BW_TOT_AVAIL, a total available bandwidth, by N and obtains the average of the bandwidths requested from ONUs(100). Then the OLT appoints the first ONU among the ONUs that have requested bandwidths(102), and compares RW_REQi, a requested bandwidth, with the average BW_AVG(104). In case that RW_REQi is larger than BW_AVG, the OLT allocates the bandwidth of BW_AVG only(108). However, if RW_REQi is equal to or smaller than BW_AVG, the OLT allocates the whole of the requested bandwidth RW_REQi as BW_ALLOCi, an allocation bandwidth. Then the OLT adds BW_AVG-BW_REQi, the difference between BW_AVG and BW_REQi, to BW_REMAIN(106).