Efficient strictly non-blocking multicast switch architecture for time division multiplexed traffic
US7468974B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2004 |
| Grant date | Dec 23, 2008 |
| Priority date | — |
| Expiry date | Oct 24, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/1334
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A Forward Propagation Architecture is a novel switch architecture based on well-known unicast switching architectures, and provides two desirable properties: (1) no rearrangement of established calls is ever required and (2) the architecture is strictly non-blocking for multicast, even when multicast destinations are dynamically added to existing calls. These properties (excluding dynamic multicast destination addition) can be provided by standard architectures or Time:Space:Time architectures with speedup proportional to the width of the widest multicast to be supported. The speedup required by the FPA is constant and practical (approximately 4× speedup) and at significantly less hardware cost than n2 architectures. The key to the FPA's capability is a sequentially doubled fabric with a feedback loop. The FPA requires a routing algorithm for connection setting. The connection-setting algorithm is sufficiently simple to be implemented in hardware.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.