| 摘要 |
A DBA method for transmitting uplink data in an Ethernet PON is provided to minimize the unnecessary waste of an uplink bandwidth by dynamically allocating the uplink bandwidth according to the amount of traffic of an ONU and minimize a transfer time required to distribute a bandwidth by varying WFi, a redundant time use rate, according to the characteristics of traffic, thereby optimizing equity and availability related to bandwidth distribution and minimizing a transmission relay time. A DBA(Dynamic Bandwidth Allocation) method for transmitting uplink data comprises the following steps of: comparing REQi(an uplink bandwidth available prospect time) with CREDITi(a maximum available time) ensured by SLA(Service Level Agreement) if a bandwidth allocation request message including REQi information from a specific ONU(Optical Network Unit, ONUi) is received(S101,S102); determining a REMNANT_TIME which can be used in the traffic processing of the ONUi if the REQi is larger than the CREDITi(S104); and finally determining a GRANTi(an uplink bandwidth available time) by using a WFi(a parameter on distribution of a redundant bandwidth determined by the SLA) and the CREDITi and determining the GRANTi by varying the WFi according to the number of ONUs participating in a SHARED_TIME and traffic conditions(S105).
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