Invention Grant
US09331809B2 DWA control in an OLT with decrease in margin of bandwidth utilization caused by bandwidth reallocation minimized
有权
由带宽重分配引起的带宽利用率边缘减少的OLT中的DWA控制最小化
- Patent Title: DWA control in an OLT with decrease in margin of bandwidth utilization caused by bandwidth reallocation minimized
- Patent Title (中): 由带宽重分配引起的带宽利用率边缘减少的OLT中的DWA控制最小化
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Application No.: US14575398Application Date: 2014-12-18
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Publication No.: US09331809B2Publication Date: 2016-05-03
- Inventor: Masahiro Sarashina
- Applicant: Oki Electric Industry Co., Ltd.
- Applicant Address: JP Tokyo
- Assignee: Oki Electric Industry Co., Ltd.
- Current Assignee: Oki Electric Industry Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Rabin & Berdo, P.C.
- Priority: JP2014-063811 20140326
- Main IPC: H04J14/02
- IPC: H04J14/02
Abstract:
In a TDM/WDM-PON using cyclic sleep, a controller in an OLT calculates the total bandwidth in use for each OSU, and compares the total bandwidth with a threshold. If the calculated bandwidth exceeds the threshold, the controller determines the number of ONUs staying in sleep mode among the ONUs managed by the assignor OSU. If such an ONU exists, that ONU is selected as an ONU whose management is to be changed. From the total bandwidth in use of an assignor OSU from which the management is to be changed, a bandwidth allocated to the ONU which is in sleep mode is subtracted to thereby obtain a bandwidth, which will be compared with the threshold. If the calculated bandwidth exceeds the threshold, from among active ONUs managed by the assignor OSU an ONU whose management is to be changed is selected.
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