Dynamic bandwidth allocation method employing tree algorithm and ethernet passive optical network using the same
US7352759B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2003 |
| Grant date | Apr 1, 2008 |
| Priority date | — |
| Expiry date | Feb 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2011/0088
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a DBA (Dynamic Bandwidth Allocation) method for an E-PON including an OLT and ONUs, DBACNs (DBA Control Nodes) corresponding to processes in a tree algorithm are arranged in multi-level stages with the ONUs being in the lowermost stage. DBACNs or ONUs in a specific stage are connected to a DBACN from its immediately higher stage in a tree structure. A process of allowing a DBACN to collect bandwidth request information from DBACNs or ONUs in its immediately lower stage is performed sequentially from the lowermost DBACNs to the uppermost DBACN. The uppermost DBACN allocates the smaller one of a total available allocation-bandwidth and a total requested bandwidth to DBACNs in its immediately lower stage in their priority order. DBACNs, other than the uppermost DBACN, each allocate a bandwidth allocated down from a DBACN in the immediately higher stage to DBACNs or ONUs in the immediately lower stage in their priority order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.