METHOD FOR ALLOCATING BANDWIDTHS FOR VOICE SERVICES IN GIGABIT ETHERNET PASSIVE OPTICAL NETWORK

摘要

PURPOSE: A method for allocating bandwidths for voice services in a GE-PON(Gigabit Ethernet-Passive Optical Network) is provided to offer a voice service within a preset transmission latency time and to efficiently use an allocated bandwidth. CONSTITUTION: An OLT(Optical Line Termination) transmits a transfer opportunity grant frame to each ONU(Optical Network Unit), synchronized with the OLT(S110). Receiving the transfer opportunity grant frame, each ONU transmits a response frame to the OLT. If response frames are received(S120), the OLT judges whether the received response frames are ONU registration requests(S130). In case that it is judged that the received response frames are ONU registration requests, the OLT checks the number of the ONUs that transmitted the response frames(S150). After checking the number of the ONUs, the OLT divides a time slot into a plurality of minislots having an identical bandwidth. Then the OLT segments a part of the bandwidth of the divided minislots according to the number of the ONUs and allocates the fixed voice transmission bandwidth to each of the ONUs(S160).