Combined hardware and software implementation of link capacity adjustment scheme (LCAS) in SONET (synchronous optical network) virtual concatenation (VCAT)
US7558287B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2005 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Aug 18, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/1611
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Combined hardware and software processing is applied in an end node of the network which includes mapping/demapping and deskewing. Most of the LCAS procedure is implemented in software so that it can be modified easily. Some of the procedure is implemented in hardware to meet stringent timing requirements. In particular, the handshaking protocol is implemented in software and the procedure for actually changing of the link capacity in response to the handshaking is implemented in hardware. The hardware and software communicate via a shared memory which includes a receive packet FIFO, receive control and status registers, a transmit packet FIFO, transmit control and status registers, and a transmit time slot interchange table.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.