Dynamic wavelength bandwidth allocation method , dynamic wavelength bandwidth allocation program , dynamic wavelength bandwidth allocation recording medium , subscriber accommodation devices and passive optical network system

摘要

Disclosed is a wavelength division multiplexing / time division multiplexing passive optical network (WDM / TDM-PON), only if the switching of the upstream wavelength required , by performing the switching of the upstream wavelength , to frequent communication interruption and equipment is intended to prevent an increase in high load and power consumption . A switching instruction signal generating unit 2 of the OLT for each ONU that is not allocated an uplink band based on the band limitation of the upstream wavelength band of the upstream wavelength different from the upstream wavelength to which the ONU is received at the present time but , that there is room to accommodate the bandwidth of the ONU, that the band of the upstream wavelengths to which the ONU is received at this time is less than the band is missing or predetermined threshold afford to accommodate for the ONU, past the ONU of the actual allocation upstream bandwidth is , when you meet all the small things , than past requests upstream bandwidth of the ONU, and from upstream wavelength which the ONU is housed at the present time to the different upstream wavelength , the upstream wavelength to the ONU I want to change the assignment . [ Selection Figure ] Figure 1