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1. 发明授权

US06980519B1 Multi-table based grant generator for improved granularity in an ATM-PON 有权
标题翻译：基于多表的授权生成器，用于改进ATM-PON中的粒度
公开(公告)号：US06980519B1
公开(公告)日：2005-12-27
申请号：US09616408
申请日：2000-07-14
申请人： David N Horn , Kyeong-Soo Kim , J H J Maessen
发明人： David N Horn , Kyeong-Soo Kim , J H J Maessen
IPC分类号： H04L12/44 , H04L12/56 , G01R31/08
CPC分类号： H04Q11/0067 , H04L12/5602 , H04L2012/5605 , H04L2012/561 , H04L2012/5615 , H04L2012/5679 , H04Q2011/0064
摘要： A multi-table-based grant generator in accordance with the present invention solves the issue of bandwidth granularity, while maintaining the simplicity of a table approach. The present invention grant generator provides grants of fine granularity for regulation of upstream transmission of cells in an ATM PON. Multiple grant tables having differing bandwidth granularities are linked together through a simple grant distribution mechanism. The grant tables and grant distribution mechanisms can be recursively linked to achieve a number of different granularities. The grant generator of the present invention is based on multiple grant tables with a combination of multiplexers, dividers, and address counters. The grant generator provides both larger and smaller bandwidths for data grants as well as PLOAM grants without large size grant tables. In one exemplary embodiment of the present invention, improved granularity is achieved, where a first grant table is used for one size of bandwidth grant, e.g., data grants, and the second grant table is used for another size of bandwidth grant, e.g., low bandwidth data grants as well as PLOAM grants. A simple clock divider couples to each of the grant tables through corresponding address counters. The clock divider provides a set number of bandwidth grants from each table over a complete cycle. The clock divider also selects an appropriate input port of a multiplexer through which the grants from each grant table are respectively transmitted. By having the ability to issue variable sized bandwidth grants, the granularity is significantly improved, thereby translating to a more efficient use of the bandwidth. More specifically, grants of a finer granularity can be issued without the need for an excessively large grant table usually thought to be necessary to produce fine granularities.
摘要翻译：根据本发明的基于多表的授权生成器解决了带宽粒度的问题，同时保持了表方法的简单性。本发明的授权生成器提供用于调整ATM PON中的小区的上行传输的细粒度的准许。具有不同带宽粒度的多个授权表通过简单的授权分配机制链接在一起。授权表和授权分配机制可以递归链接以实现多个不同的粒度。本发明的授权生成器基于具有多路复用器，分频器和地址计数器的组合的多个授权表。授权生成器为数据授予提供较大和较小的带宽以及无大容量授权表的PLOAM授权。在本发明的一个示例性实施例中，实现了改进的粒度，其中第一授权表用于一个大小的带宽授权，例如数据许可，并且第二许可表用于另一大小的带宽授权，例如低带宽数据授权以及PLOAM资助。简单的时钟分频器通过相应的地址计数器耦合到每个授权表。时钟分频器在一个完整的周期内提供每个表的一组数量的带宽授权。时钟分频器还选择分配了来自每个授权表的授权的多路复用器的适当输入端口。通过具有发布可变大小的带宽授权的能力，显着提高了粒度，从而转化为更有效地使用带宽。更具体地，可以发出更细粒度的授予，而不需要通常被认为是产生细粒度所必需的过大的授权表。

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